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  • Inorganic Chemistry  (6,623)
  • Aerodynamics  (160)
  • Earth model, also for more shallow analyses !  (32)
  • Niederschlag  (30)
  • Humans
  • SPACE SCIENCES
  • 1950-1954  (1,730)
  • 1940-1944  (1,714)
  • 1935-1939  (3,401)
Collection
Keywords
Years
Year
  • 1
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    In:  Bull. Seism. Soc. Am., Milano, Gustav Fischer, vol. 29, no. 6, pp. 531-538, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Physical properties of rocks ; BSSA
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  • 2
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 54, no. 6, pp. 499-526, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Earth model, also for more shallow analyses !
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  • 3
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    In:  Geol. Soc. Am. Proc., Milano, Gustav Fischer, vol. 47, no. 3, pp. 306-307, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1936
    Keywords: Tectonics ; CRUST ; Earth model, also for more shallow analyses ! ; Plate tectonics
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  • 4
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    In:  Am. Journ. Science, Milano, Gustav Fischer, vol. 240, no. 6, pp. 147-149, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1942
    Keywords: Earth model, also for more shallow analyses ! ; Geodesy
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  • 5
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    In:  Bull. Geol. Soc. Am., Milano, California Institute of Technology Pasadena, vol. 62, no. 6, pp. 427-440, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1951
    Keywords: CRUST ; Earth model, also for more shallow analyses !
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  • 6
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    In:  Bull. Seism. Soc. Am., Los Angeles California, 1 p., California Institute of Technology Pasadena, vol. 43, no. 6, pp. 223-232, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1953
    Keywords: Velocity analysis ; Seismology ; Earth model, also for more shallow analyses ! ; BSSA
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  • 7
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    In:  Monthly Not. R. astr. Soc., Geophys., Tulsa, 3-4, vol. Suppl. 6, no. 1, pp. 50-59, pp. B09405, (ISBN: 0-12-018847-3)
    Publication Date: 1950
    Keywords: Seismology ; D" ; density ; Earth model, also for more shallow analyses !
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  • 8
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 50, no. 6, pp. 1950, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Physical properties of rocks
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  • 9
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 53, no. 6, pp. 1818-1819, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1942
    Keywords: Seismology ; Earth model, also for more shallow analyses ! ; CRUST
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  • 10
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 54, no. 6, pp. 473-498, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1943
    Keywords: Seismology ; Earth model, also for more shallow analyses !
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  • 11
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. XV:, pp. 382-407, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: Earth model, also for more shallow analyses ! ; Strain ; TIDES ; (The Earth's free) oscillations
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  • 12
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    In:  J. Geophys. Res., Warszawa, Elsevier, vol. 57, no. 2, pp. 227-286, pp. L02307, (ISBN: 0-12-018847-3)
    Publication Date: 1952
    Keywords: Earth model, also for more shallow analyses ! ; Review article ; Elasticity ; Physical properties of rocks ; Velocity depth profile ; incompressibility ; shear ; modulus ; DENS ; JGR
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  • 13
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    In:  Science, Milano, Gustav Fischer, vol. 82, no. 3, pp. 52, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1935
    Keywords: Earth model, also for more shallow analyses ! ; Elasticity ; Geothermics ; Physical properties of rocks
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  • 14
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    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 47, no. 3, pp. 1587-1610, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1936
    Keywords: Tectonics ; CRUST ; Earth model, also for more shallow analyses ! ; Plate tectonics
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  • 15
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    In:  Science, Milano, Gustav Fischer, vol. 90, no. 6, pp. 456-458, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1939
    Keywords: Seismology ; Seismicity ; Earth model, also for more shallow analyses !
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  • 16
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    In:  Science, Milano, California Institute of Technology Pasadena, vol. 111, no. 6, pp. 29-30, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1950
    Keywords: CRUST ; Earth model, also for more shallow analyses !
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  • 17
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    In:  Trans., Am. Geophys. Union, Milano, California Institute of Technology Pasadena, vol. 32, no. 6, pp. 497-543, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1951
    Keywords: Elasticity ; Rock mechanics ; Rheology ; Fluids ; Earth model, also for more shallow analyses ! ; EOS ; BIBTEX? ; ENDNOTE?
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  • 18
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. XI:, pp. 291-299, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Seismology ; Hypocentral depth
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  • 19
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    Dover Publ.
    In:  Dover, 439 pp., Dover Publ., vol. 7, no. XVI:, pp. 385-389, (ISBN 0-12-305355-2)
    Publication Date: 1951
    Keywords: Handbook of geophysics ; Earth model, also for more shallow analyses !
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  • 20
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    British Association for the Advancement of Science, Gray Milne Trust
    In:  London, 50 pp., 4th print., 1970, British Association for the Advancement of Science, Gray Milne Trust, vol. 46, no. XVI:, pp. 1-14, (ISBN: 0-387-30752-4)
    Publication Date: 1940
    Keywords: Earth model, also for more shallow analyses ! ; Travel time ; Seismology ; Handbook of geophysics
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  • 21
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. IX:, pp. 178-226, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: Earth model, also for more shallow analyses ! ; evolution
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  • 22
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. VIII:, pp. 167-177, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: Earth model, also for more shallow analyses ! ; Elasticity ; TIDES ; (The Earth's free) oscillations ; Geothermics
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  • 23
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    In:  Mitt. Obstbauvers. ring Altes Land, York 7:102-115.
    Publication Date: 1952
    Description: Bericht über die Folgen des Spätfrostes im Jahr 1952 an verschiedenen Obstbaumarten (Äpfel, Birnen, Kirschen, Beeren) KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag) auf den Ertrag von Obstbäumen. KATASTER-DETAIL: Delta T (Januar, Februar, März) +, dann Vegetationsbeginn - (früher); Delta Nied (Februar-Mai) -, dann Ertrag (Boskoop, Coulon, Kehdinger Rambur, Cox) -; Delta T (Mai) - : T 〈 0 °C(Spätfröste), dann Schäden der Früchte an Obstbäumen -;
    Keywords: Niederelbe ; 1952 ; Apfel ; Kirsche ; Boden ; Ertrag ; Niederschlag ; Temperatur ; Witterung ; Frost ; Obst ; Birne
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  • 24
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    In:  Prakt. Blätt. Pflanzenb. u. –schutz 14;p. 343-348
    Publication Date: 1937
    Description: Der Autor schildert detailliert den Witterungsverlauf des Vegetationsjahres 1935/36, gibt eine kleine Übersicht über die aufgetretenen Pflanzenkarankheiten und -schädlinge und bringt beides ansatzweise in einen Zusammenhang. Zudem listet er die Erträge des Vegetationsjahres auf und beurteilt diese. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Bayern ; 1936 ; Ertrag ; Getreide ; Niederschlag ; Temperatur ; Wachstum ; Witterung ; Hackfrüchte ; Hochwasser
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  • 25
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    In:  Anz. Schädl.kunde 20: 16ff
    Publication Date: 1944
    Description: Beziehung zwischen Klima und Insektenbiologie KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland, teilw. einzelne Regionen ; 1936-1941 ; Insekten ; Luftfeuchte ; Forst ; Klima ; Niederschlag ; Pflanzenschädling ; Temperatur
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  • 26
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    In:  Dtsch. Forstztg. 10: 307-308
    Publication Date: 1941
    Description: Beschreibung der großen Frassschäden der letzten Jahrzehnte, bezug der Temperatur und des Niederschlages auf die Entwicklungsmöglichkeit einer Population KATASTER-BESCHREIBUNG: Ziiterte Untersuchungen zur Entwicklung der Nonnenraupe KATASTER-DETAIL: Delta T+ (Temperaturoptimum von 21.5°C, Ende April-Anfang Mai), dann günstige Entwiclungsbedingungen Delta Nied- (relative Feuchte schwankt zwischen 50-100%), dann Absterben großer Zahl futtersuchender Raupen
    Keywords: Deutschland, teilw. einzelne Regionen ; 1850-1940 ; Insekten ; Luftfeuchte ; Fichte ; Forst ; Kiefer ; Niederschlag ; Pflanzenschädling ; Temperatur
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  • 27
    Publication Date: 1942
    Description: Beobachtungen zwischen Absterben von Tannen, der Witterung und dem Auftreten von Schädlinen (Tannentriebwickler, Tannentrieblaus) KATASTER-BESCHREIBUNG: Zusammenhang zwischen Tannensterben und ungünstigen Standortbedingungen (trockene Flach- und Hügelland) KATASTER-DETAIL:
    Keywords: Böhmen, Mähren und den Karpathenländern ; 1930-1941 ; Tanne ; Niederschlag
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  • 28
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    In:  Gartenbauwissenschaft Bd. 17, S.603-615
    Publication Date: 1943
    Description: Einfluss der Temperatur und des Niederschlages auf den Ernteertrag von Birnen und Äpfeln KATASTER-BESCHREIBUNG: Durch Berechnung von Kennziffern zu Wirkung des Sommerregens auf den Obstertrag wird die Bedeutung der Niederschläge in bestimmten Monaten des Vor- und des Erntejahres bestimmt KATASTER-DETAIL: Nied+(Oktober des Vorjahres) und Nied+ (Juli des Erntejahres), dann hohe Erträge von Äpfeln und Birnen
    Keywords: Holstein ; 1916-1935 und 1921-1941 ; Apfel ; Ertrag ; Korrelationsmethode ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Birne
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  • 29
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    In:  Z. f. Acker- und Pflanzenbau 95:233-260
    Publication Date: 1952
    Description: Zusammenhang zwischen der Temperatur und dem Niederschlag zu unterschiedlichen Zeitpunkten KATASTER-BESCHREIBUNG: (Einteilung in Dekaden) zu verschiedenen, ertragsrelevanten Zeiträumen (Blühreife, Anlagestadium, Knospenstadium und Blütenstadium) von Apfel und Birnen und Zusammenhang zu Niederschlag und Temperatur bei verschiedenen Sorten KATASTER-DETAIL: Nied+(〉30mm) (Knospendifferenzierung, 20.6-20.7. des Vorjahres), Nied+(〉70mm im März), Nied+ (〉20mm 1-10 Tage vor der Blüte), Tmit*(Tmin 〈-2°C als Nachftrost kritisch, vor, währed und 30 Tage nach der Blüte) und Nied- (〈70mm, bis 30 Tage nach der Blüte) führten zu hohen Erträgen
    Keywords: Baden-Württemberg, Hohenheim ; 1936-1947 ; Apfel ; Ertrag ; Korrelationsmethode ; Niederschlag ; Temperatur ; Witterung ; Frost ; Obst ; Birne
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  • 30
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    In:  Die Gartenbauwissenschaft 10: 289-353
    Publication Date: 1937
    Description: Beschreibung der Beziehungen zwischen Ernteerträgen und der Witterung (Temperatur und Niederschlag mithilfe der Rangordungsmethode nach Holdefleiss) in 2 unterschiedlich klimatischen Regionen, Bestimmung von kritischen Zeiten, Auswirkungen auf die Obstsorten und -arten. KATASTER-BESCHREIBUNG: Faktoren Niederschlag und Temperatur haben zu bestimmten Zeiten wichtige Funktionen, schwanken aber zwischen den Arten und Sorten, jedoch Niederschlag ab Mai gewinnt umso mehr an Bedeutung, je geringer die Wasserspeicherkapazität des Bodens, höchster Wasserbedarf im Mai/Juni KATASTER-DETAIL: Delta Temp+ (April im Erntejahr), dann Ertrag ++ Delta Nied Juni (〉63mm Mittel von 1928-33 in Dahlem), dann Ertrag Gravensteiner 〉 115kg Delta Nied+ und Delta Temp+ (Juli-August im Vorjahr), dann Ertrag ++ Delta Nied- (Juli-August im aktuellen Jahr, , dann Ertrag -
    Keywords: Berlin, Hohenheim ; 1909-33, 1907-28 ; Apfel ; Ertrag ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Birne
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  • 31
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    In:  Der Forschungsdienst 2: 581-587
    Publication Date: 1937
    Description: Effekt der Zusatzberegnung auf den Ertrag von Hafer KATASTER-BESCHREIBUNG: Erste Versuche zur Bestimmung des Beregnungszeitpunktes von Getreide KATASTER-DETAIL: Delta Nied+ (Mai 〉 73mm), dann kein Effekt einer zusätzlichen Beregnung auf Ertrag bei Hafer und Gerste (Jahr 1931 und 1932)
    Keywords: Berlin, Brandenburg ; 1934 ; Ertrag ; Hafer ; Niederschlag ; Trockenheit ; Gerste
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  • 32
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    In:  Landwirtschaftl. Jahrbuch 68:642-686
    Publication Date: 1942
    Description: Ableitung kritischer Faktoren (Temperaturoptima und Wasserversorgung) in einzelnen Wachstumsstadien KATASTER-BESCHREIBUNG: Zusammenhang zwischen Temperaturänderung während der Blüte von Weizen und dem Ertrag KATASTER-DETAIL: Delta T + und -: Tmit von 14-15°C, Änderung um +1 K auf 16°C, aber auch Rückgang um 2K auf 13°C, dann Rückgang des Ertrages
    Keywords: Kölner Bucht ; 1907-37 ; Boden ; Ertrag ; Korrelationsmethode ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Witterung ; Düngung ; Hackfrüchte
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  • 33
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    In:  Kulturtechniker, Berlin 46:19-41.
    Publication Date: 1943
    Description: Bedeutung und Wirkung des Windschutzes auf Anbauart, Fruchtfolge, Gare- und Bodenpflege, Schlageinteilung, Verdunstung, Deck-, Schutz-, Mischfrucht- und Streifenanbau KATASTER-BESCHREIBUNG: Einfluss von Windschutz auf den Ertrag KATASTER-DETAIL: Windschutz +, dann Delta T(Tag) + und Delta T(Nacht)-; Windschutz +, dann Delta Relf +; Windschutz +, dann Verdunstung -; Windschutz +, dann Bodenerosion -; Windschutz +, dann Schneeanhäufung +; angepasste Bodenbearbeitung (schollige, klumpige Bodenoberfläche), dann Wasserhaltungsfähigkeit + -〉 Windschutz +, dann Ertragserhöhung + bzw. ++ (3-400%; ++: Körnerfrüchte auf 20-25vH, Rüben, Gräser, Leguminosen; +: Sommergetreide, Hafer )
    Keywords: weltweit ; letzten100 Jahre ; Boden ; Ertrag ; Niederschlag ; Temperatur ; Verdunstung ; Wind ; Frost
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  • 34
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    In:  Landw. Jahrbuch 89:793-808.
    Publication Date: 1940
    Description: Allgemeiner Bericht über Anpassungen der Landwirtschaft an das Klima, wie beispielsweise extensive und intensive Landwirtschaft, Fruchtfolge, Bodenbearbeitung, Frostschadenverhütung und Düngung. KATASTER-BESCHREIBUNG: - KATASTER-DETAIL: -
    Keywords: Deutschland ; 1. Hälfte 20. Jahrhundert ; Anbautermine ; Boden ; Landwirtschaft ; Niederschlag ; Temperatur ; Verdunstung ; Wassermangel ; Düngung ; Frost ; Sonnenscheindauer
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  • 35
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    In:  Der Kulturtechniker 38: 103-129
    Publication Date: 1935
    Description: Bestimmung der Dürremonate in Sachsen im Rahmen der vom Deutschen Ausschuß für Kulturbauwesen in Auftrag gegebene Untersuchungen auch für alle anderen Regionen Deutschlands KATASTER-BESCHREIBUNG: Untersuchungen zu den Niederschlagsmengen an allen 98 Stationen in Sachsen für die Vegetationszeit, Dürrehäufigkeit von 12 von Hundert (westl. Ausläufer des Fichtelgebirges) bis hin zu 54 vH (südlich von Meißen, Hinweis auf die Höhenlage und Windverhältnisse KATASTER-DETAIL: Nied- (〈50mm, in den Monaten Mai-August), dann Dürremonat mit zu erwartenden Konsequenzen für die Landwirtschaft Nied+ (〉100mm in den Monaten Mai-August), dann Bezeichnung als nasser Monat, ebenfalls Folgen für die Produktivität
    Keywords: Sachsen ; 1891-1925 ; Klima ; Landwirtschaft ; Niederschlag ; Trockenheit ; Vegetationsperiode
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  • 36
    Publication Date: 1942
    Description: Betrachtung des Klimas (Temperatur und Niederschlag) in Dekaden und Bildung von Ertrags-, Temperatur- und Niederschlagsklassen und daraus Ableitungen über die Beziehungen Ertrag und Witterung KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag) auf den Ertrag KATASTER-DETAIL: Delta T (März) + und Delta Nied (März) +, dann Erträge +; Delta T (April -, dann Erträge +; Delta Nied (Ende Juni,Ende Juli)-, dann Erträge + Delta T (Anfang Juli) +, dann Erträge +
    Keywords: Schlesien ; 1926-38 ; Boden ; Ertrag ; Niederschlag ; Weizen ; Witterung
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  • 37
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    In:  Landw. Forsch. Darmstadt, 2. Sonderheft: 51-60
    Publication Date: 1952
    Description: Überblick über die Zusammenhänge zwischen Klima bzw. Witterung und Pflanzenqualität von Ackerfrüchten, Wiesengräsern, Obst, Gemüse, Gewürzpflanzen und Wein KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag, Sonnenschein, Strahlung) auf die Qualität verschiedener Anbaukulturen KATASTER-DETAIL: Delta T (Erntezeit) + und Delta Nied (Erntezeit) -, dann Feuchtigkeitsgehalt der Körner (Ackerfrüchte) -; Delta T (Erntezeit) - und Delta Nied (Erntezeit) +, dann Feuchtigkeitsgehalt der Körner (Ackerfrüchte) +; Delta T (Zeit der Kornausbildung) ++ und Delta Nied (Zeit der Kornausbildung) -, dann Stärkegehalt der Körner (Ackerfrüchte) - und Einweißgehalt der Körner + sowie Größe der Körner -; Delta T (Zeit von Milch- zur Voll- und Todreife) + und Delta Sonn (Zeit von Milch- zur Voll- und Todreife) + und Delta Nied (Zeit von Milch- zur Voll- und Todreife) -, dann besserer Kleber und gute Backfähigkeit; Delta blaue Strahlung +, dann Einweißgehalt - und Kleberqualität +; Delta Nied (Juni, Juli) +, dann Fermenttätigkeit +; Informationen zu den anderen Anbaukulturen: siehe Artikel
    Keywords: Deutschland ; 1. Hälfte 20. Jahrhundert ; Ertrag ; Getreide ; Niederschlag ; Temperatur ; Trockenheit ; Wachstum ; Witterung ; Hackfrüchte ; Obst ; Sonnenscheindauer ; Wein ; Gemüse
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  • 38
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    In:  Gesunde Pflanzen 5: 261-263
    Publication Date: 1953
    Description: Beschreibung der Auswirkungen von Spätfrösten auf den Ertrag von verschiedenen frostempfindlichen Kulturpflanzen (Winter-Gerste, Erbsen, Kartoffeln) KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag) auf den Ertrag KATASTER-DETAIL: Delta T (April) + und Delta T (Mai) - (Spätfröste), dann Ertrag (Erbsen) --; Delta T (April) + und Delta T (Mai) - (Spätfröste), dann Erntezeitpunkt (Kartoffeln) + (später);
    Keywords: Mitteldeutschland ; 1952 ; Kartoffeln ; Anbautermine ; Boden ; Ertrag ; Niederschlag ; Temperatur ; Wachstum ; Wassermangel ; Witterung ; Frost ; Gerste ; Erbsen
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  • 39
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    In:  Akademie-Verlag Berlin, Abhandlungen des meteorologischen und hydrologischen Dienstes der deutschen demokratischen Republik, Nr. 14, Bd. II.
    Publication Date: 1952
    Description: Phänogramme und Beschreibung der Abhängigkeit verschiedenster Zeigerpflanzen des Frühlings (Schneeglöckchen, Rosskastanie, Flieder), des Sommers (Holunder, Roggen) und des Herbstes von meteorologischen Faktoren und Vergleich mit landwirtschaftlich wichtigen phänologischen Phasen KATASTER-BESCHREIBUNG: Eintritt phänologischer Phasen ist von den Temperatursummen abhängig; Einfluss der Temperatur auf den Ertrag KATASTER-DETAIL: Delta T +: T 〉 8°C, dann Beginn Pflanzenwachstum; Delta T (Mai und Juni) -, dann Erträge Winterroggen +;
    Keywords: Thüringen ; 1881-1909, 1929-1948 ; Getreide ; Landwirtschaft ; Niederschlag ; Phänologie ; Temperatur
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  • 40
    Publication Date: 1951
    Description: Beobachtungen zum Massenauftreten des Rübenderbrüßlers in Abhängigkeit von der vorherrschenden Witterung KATASTER-BESCHREIBUNG: Zusammenhang zwischen der Witterung (Bodentemperatur und Bodenfeuchte) und dem Massenauftreten des Käfers KATASTER-DETAIL: Delta Nied (Sommer) +, dann Mortalität +; Delta T (Sommer des Vorjahres) + und Delta Nied (Sommer des Vorjahres) - sowie Delta T ( Frühjahr des Schadjahres) +, dann Massenauftreten des Käfers +; Delta T: Tmit (Boden) 〉 10°C, Auskriechen der Käfer aus dem Boden
    Keywords: Mitteldeutschland ; 1947-1949 ; Insekten ; Zuckerrüben ; Boden ; Landwirtschaft ; Niederschlag ; Pflanzenschädling ; Temperatur ; Trockenheit ; Witterung
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  • 41
    facet.materialart.
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    In:  Beiträge zur Entomologie, Band 2, Nr. 2/3, p. 256-315
    Publication Date: 1952
    Description: Beobachtungen und Untersuchungen zur Biologie, Epidemiologie und Bekämpfung des Rübenderbrüßlers KATASTER-BESCHREIBUNG: Einflüsse der Witterung auf die Entwicklung und das Massenauftreten des Käfers KATASTER-DETAIL: Delta T und Delta Nied und Delta Sonn: T(Boden)〉8°C und Delta Nied -, Delta T (Luft) + und Delta Sonn +, dann Verlassen des Bodens; Delta T -, dann Unterbrechungen der Abwanderung +; Delta T und Delta Sonn: T〉=22°C und Sonnenschein, dann Flug; Delta T: T〉= 15-17°C, dann Reifung; T=26,2°C und Relf=30-37%, dann maximale Eizahl; T〈2°C, dann Erstarrungszustand; Delta Nied (Mai, Juni) -, dann Massenauftreten +; Delta T +, dann Eizahl +;
    Keywords: Sachsen-Anhalt ; 1950 ; Zuckerrüben ; Boden ; Niederschlag ; Pflanzenschädling ; Temperatur ; Witterung ; Sonnenscheindauer
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  • 42
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    In:  Mitteilungen aus der Biologischen Zentralanstalt für Land- und Forstwirtschaft Berlin-Dahlem, Heft 79
    Publication Date: 1954
    Description: Zusammenfassender Bericht über die in den Jahren 1947-1952 in Westdeutschland durchgeführten Untersuchungen zur Epidemiologie, Verbreitung, wirtschaftlichen Bedeutung und Bekämpfung dieser Virose KATASTER-BESCHREIBUNG: Hauptbefallsgebiete sind solche, mit mildem Winterklima, in denen die langjährigen Mittelwerte des kältesten Monats Januar nicht unter 0°C abfallen; KATASTER-DETAIL: Delta T(Sommer)+ und Delta Nied (Sommer) -, dann Delta t(Individualentwicklung der Überträger)- und Massenentwicklung (der Überträger) +; Delta T(Sommer)+ und Delta Nied (Sommer)-, dann Vergilbungsschäden +; Delta T - und Delta Lichtintensität -, dann Wirkung des Virus -;
    Keywords: Westdeutschland ; 1947-1952 ; Infektionskrankheiten ; Ertrag ; Niederschlag ; Pflanzenkrankheit ; Pflanzenschädling ; Temperatur ; Trockenheit ; Wachstum ; Witterung ; Düngung
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  • 43
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    In:  Nachrichtenblatt des Deutschen Pflanzenschutzdienstes, p. 171-172
    Publication Date: 1950
    Description: Bericht über die Beobachtungen zur Entwicklung und zum Auftreten der Möhrenfliege unter dem Einfluss der Witterung und der Lage KATASTER-BESCHREIBUNG: Einfluss der Witterung und der Lage auf die Befallsstärke der Fliege KATASTER-DETAIL: Delta Lichtintensität +, dann Möhrenfliegenbefall -; Delta Nied +, dann Entwicklung der Maden +; Delta Wind +, dann Befall -
    Keywords: Schleswig-Holstein ; 1948-1949 ; Insekten ; Niederschlag ; Pflanzenschädling ; Temperatur ; Trockenheit ; Wind ; Witterung ; Sonnenscheindauer ; Gemüse
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  • 44
    Publication Date: 1953
    Description: Beobachtungen zu den wichtigsten Massenwechselphasen, welche phänologisch mit Hilfe der Temperatursummenregel ausgewertet wurden sowie Beobachtungen zum Einfluss des Mikroklimas auf die Flugphase KATASTER-BESCHREIBUNG: Zusammenhang zwischen den wichtigsten Massenwechselperioden und der Temperatur, angegeben mit der mittleren Temperatursumme ab dem Eintritt des Vorfrühlings (Schneeglöckchenblüte); Einfluss von flugbegrenzenden Faktoren (Licht, Wind, Niederschlag) und flugbeeinflussenden Faktoren (Temperatur, Luftfeuchtigkeit) KATASTER-DETAIL: Temperatursumme = 160°C, dann Schlüpfen der ersten Fundatrixlarven; Temperatursumme = 360°C, dann Eintreten erster reifer Fundatrizen; Temperatursumme = 600°C, dann Reife der ersten fundatrigenen Fliegen und Anfang des fundatrigenen Zufluges; Temperatursumme = 1000-1050°C, dann Ende des fundatrigenen Zufluges und Anfang des virginogenen Zufluges; temperatursumme = 2280-2420°C, dann Ende des virginogenen Zufluges; Delta Lichtintensität + und Windgeschwindigkeit 〈 0,6m/s und T(Blattoberfläche ) 〉= 17°C, bzw. T (Luft) 〉= 15-16°C und Delta Nied -, dann Abflug +; Delta T +, dann Ablfug +, T 〉 20-26°C, dann Abflug -; Relf = 60%, dann optimaler Bereich für Abflug;
    Keywords: Quedlinburg, Thüringen ; 1949-1952 ; Luftfeuchte ; Klima ; Korrelationsmethode ; Niederschlag ; Pflanzenschädling ; Phänologie ; Temperatur ; Wind ; Witterung
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  • 45
    facet.materialart.
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    In:  Nachrichtenblatt für den deutschen Pflanzenschutzdienst, p. 143-148
    Publication Date: 1953
    Description: Bericht über die Untersuchungen zur Frage der Abhängigkeit der Imagines von klimatischen Faktoren KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Wind, Sonnenscheindauer, Luftfeuchte) auf die Flugaktivität KATASTER-DETAIL: Delta T +: T= 18°C, dann Höchstwert an geschlüpften und geschlechtsreifen Käfern; T 〉 18°C oder T 〈 18°C, dann Zahl an geschlüpften und geschlechtsreifen Käfern -; Delta Sonn +, dann Flugaktivität +; T = 23°C und Relf = 70%, dann Optimum der Flugaktivität; T = 13°C, dann Flugaktivität verhindert Delta Wind +: Wind 〉 1m/s, dann Flugaktivität vermindert, Wind 〉 2m/s, dann Flugaktivität stark gehemmt
    Keywords: Sachsen-Anhalt ; 1951-1952 ; Insekten ; Luftfeuchte ; Korrelationsmethode ; Niederschlag ; Pflanzenschädling ; Temperatur ; Wind ; Witterung ; Sonnenscheindauer
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  • 46
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    In:  Archiv der wiss. Ges. f. Land- und Forstwirtschaft 2
    Publication Date: 1950
    Description: Untersuchungen zu Ertragsunterschieden bei Zuckerrüben, Kartoffeln und Hafer durch Errechnen der Wasserbilanz in einzelnen Monaten KATASTER-BESCHREIBUNG: Einfluss von Temperatur und Niederschlag (=der Wasserbilanz) auf den Ertrag von Zuckerrübe, Hafer und Kartoffel KATASTER-DETAIL: Wasserbilanz (März bis April) ausgeglichen oder leicht positiv, dann Erträge +; Wasserbilanz (Mai bis Juni) stark negativ über mindestens 25 Tage, dann Erträge +; Wasserbilanz (Juli bis September) ausgeglichen, dann Erträge +; Delta T (Frühjahr) +, dann Erträge +; Delta T +, dann Erträge (Zuckerrübe) +; Delta T (außer Juli; bes. Juni) -, dann Erträge (Hafer)+
    Keywords: Niedersachsen, Grossraum Hannover - Göttingen ; 1932-40, 1947-49 ; Kartoffeln ; Ertrag ; Hafer ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Verdunstung ; Wassermangel
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  • 47
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    In:  Diss. Halle (Saale), Kühn-Archiv, Band 42, 1936
    Publication Date: 1936
    Description: Rangordnungsmethode nach Holdefleiß zur qualitativen Ertragsanalyse, Untersucht wurden die Erträge von Roggen, Weizen, Gerste, Hafer, Erbsen, Pferdebohnen, Hackfrüchte, Rübensamen, Zuckerrüben, Futterrüben, Kartoffeln KATASTER-BESCHREIBUNG: Einfluss der Witterung auf den Ertrag KATASTER-DETAIL: Delta Sonn (Winter) +, dann Ertrag (Roggen und Weizen) +; Delta T (Winter, September bis März) + und Delta T (Mai, Juni) -, dann Ertrag (Gerste) +; Delta Sonn (Winter) +, dann Ertrag (Sommergetreide) +; Delta T (April, Mai) - und Delta Nied (April, Mai) +, dann Ertrag (Weizen) +; Delta T (Mai bis Juli) - und Delta Nied (Mai bis Juli) +, dann Ertrag (Gerste) +; Delta Nied (April bis Juni) -, dann Ertrag (Hafer) -; Delta Sonn (März) +, dann Ertrag (Hafer) +; Delta Sonn (März) + und Delta T (Mai bis Erntezeit) -, dann Ertrag (Viktoria-Erbse) +; Delta Sonn (Winter) + und Delta Nied (Sommer) +, dann Ertrag (Pferdebohnen) +; Delta Nied +, dann Ertrag (Hackfrüchte) +; Delta Sonn (März, April) +, dann Ertrag (Zuckerrüben) +; Delta Sonn (Winter) +, dann Ertrag (Futterrüben) +; Delta T (September, Oktober - Vorjahr) + und Delta Nied (September, Oktober - Vorjahr) -, dann Ertrag (Kartoffeln) +; Delta Sonn (Winter) +, dann Ertrag (Kartoffeln) +; Delta Nied (April bis Agust) +, dann Ertrag (Kartoffeln) +;
    Keywords: Eichsfeld und Thüringer Becken ; 1900-1931 ; Ertrag ; Getreide ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Trockenheit ; Wassermangel ; Witterung
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  • 48
    Publication Date: 1950
    Description: Einteilung der Witterung in Pentaden, Berechnung einer Wetterwertzahl und Bezug zum Ernteertrag KATASTER-BESCHREIBUNG: Einfluss der Witterung (Niederschlag, Temperatur) auf den Ertrag verschiedener Getreidearten (Sommerweizen, Sommergerste, Sommerroggen, Hafer, Winterweizen, Wintergerste, Winterroggen) KATASTER-DETAIL: Delta Tmit (Pentade) 〉 5°C, dann Beginn Vegetationsperiode; Delta Nied (Winter) -, dann Ertrag (Sommergetreidearten) +; Delta Nied (März) -, dann Erträge (Sommerweizen, Sommergerste) +; Delta Nied (Winter) +, dann Erträge (Wintergetreidearten) -; Delta Nied (Winter) -, dann Erträge (Winterweizen, Wintergerste) -; t (T 〉 5°C) + (früher), dann Erträge (Winterweizen, Wintergerste) +; Detaillierte Informationen zu den einzelnen Getreidearten: siehe Artikel
    Keywords: Brandenburg ; 1938-39, 1943 ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Weizen ; Wind ; Witterung ; Hackfrüchte
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  • 49
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    In:  Mitteilungen für die Landwirtschaft 51(Heft 46).
    Publication Date: 1936
    Description: Beobachtungen zum Ernteausfall und dessen Beeinflussung durch den Witterungsverlauf im Jahr 1936. Vergleich mit vergangenen Jahren. KATASTER-BESCHREIBUNG: Zusammenhang zwischen Temperatur und Niederschlag in den Monaten April, Mai und Juni und den Reichsertragsschätzungen, bzw. den tatsächlichen Erträgen. Bedeutung eines längeren warmen und niederschlagsarmen Junis für Getreide. KATASTER-DETAIL: Delta T (Juni) -, dann Erträge + Delta T (Juni) + und Niederschlage -, dann Ersträge -
    Keywords: Deutschland ; 1930-1936 ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit
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  • 50
    Publication Date: 1937
    Description: Untersuchungen zur Bedeutung der Winterfeuchtigkeit für Roggen bis etwa zum Zeitpunkt des Ährenschiebens, Wechselwirkung Sonnenscheindauer, Temperatur und Niederschlag in unterschiedlichen phänologischen Stadien bei unterschiedlichen Roggensorten und variierender Stickstoffgabe KATASTER-BESCHREIBUNG: Einfluss der Witterung (Sonnenschein, Temperatur, Niederschlag)auf das Wachstum KATASTER-DETAIL: Delta Sonn -, dann Längenwachstum +; Winterfeuchtigkeit +, dann Wachstum +; Delta Nied (von N-Düngung bis Ährenschieben) - und Delta T (von N-Düngung bis Ährenschieben) +, dann Längenwachstum = max; Delta Nied (Hauptvegetationszeit) +, Delta T (Hauptvegetationszeit) -, Delta Sonn (Hauptvegetationszeit) -, dann Längenwachstum +; Delta Nied (Hauptvegetationszeit) + und Delta Wind (Hauptvegetationszeit) +, dann Lagerbildung +;
    Keywords: Brandenburg, Versuchsfeld Bornim bei Potsdam ; 1932-36 ; Ertrag ; Landwirtschaft ; Niederschlag ; Roggen ; Temperatur ; Wachstum ; Düngung
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  • 51
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    In:  Klima / Boden / Ernte Verlag C.V. Engelhard, Berlin. p. 7, 114-127
    Publication Date: 1942
    Description: Beziehung zwischen Witterungsablauf und Bodenzustand und deren Auswirkung auf Pflanzenwuchs und Ernte KATASTER-BESCHREIBUNG: Einfluss der Witterung auf den Ertrag von Kartoffeln KATASTER-DETAIL: Delta T (April bis Juli) -, dann Erträge (Kartoffel) +; Delta Nied (April bis Juli) -, dann Erträge (Kartoffel) -
    Keywords: Gesamtpreußen, Deutschland,Schlesien ; 1921-1932,1934 ; Zuckerrüben ; Kartoffeln ; Ertrag ; Hafer ; Landwirtschaft ; Niederschlag ; Temperatur ; Witterung ; Hackfrüchte
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  • 52
    Publication Date: 1950
    Description: Beobachtungen zum Auftreten von Roggengallmücke, Halmfliege, Getreidehalmwespe, Hafermilbe und Zwergzikade unter bestimmten Witterungsbedingungen (warme und trockene Sommer und Herbste) KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur und Niederschlag) im Sommer und Herbst auf das Auftreten der Getreideschädlinge KATASTER-DETAIL: Delta T (Sommer und Herbst) + und Delta Nied (Sommer und Hebrst) -, dann Auftreten +; Trockenperioden über mindestens 2 Jahre, dann Massenauftreten
    Keywords: Bayern ; 1947-1950 ; Anbautermine ; Landwirtschaft ; Niederschlag ; Pflanzenschädling ; Roggen ; Temperatur ; Trockenheit ; Weizen ; Witterung
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  • 53
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    McGraw-Hill
    In:  New York, 10 + 413 pp.,, McGraw-Hill, vol. 7, no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Handbook of geophysics
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  • 54
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. I:, pp. 3-10, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Review article
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  • 55
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    McGraw-Hill
    In:  New York, 10 + 413 pp., 1st ed., McGraw-Hill, vol. 7, no. XII:, pp. 301-327, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: CRUST ; Earth model, also for more shallow analyses !
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  • 56
    facet.materialart.
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. VIII:, pp. 165-175, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; CRUST ; Crustal deformation (cf. Earthquake precursor: deformation or strain)
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  • 57
    facet.materialart.
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. IX:, pp. 177-217, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; CRUST
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  • 58
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. XIV:, pp. 345-360, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Elasticity
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  • 59
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    McGraw-Hill
    In:  New York, McGraw-Hill, vol. 7, no. XV:, pp. 361-384, (ISBN 0-12-305355-2)
    Publication Date: 1939
    Keywords: Earth model, also for more shallow analyses ! ; Stress ; Strength ; Elasticity ; Inelastic
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  • 60
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. VIIa, pp. 438-470, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: Review article ; Earth model, also for more shallow analyses !
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  • 61
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. VII:, pp. 150-166, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: Geothermics ; Earth model, also for more shallow analyses !
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  • 62
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    Dover Publ.
    In:  Professional Paper, Internal constitution of the earth - Physic of the earth, Dover, 439 pp., Dover Publ., vol. 7, no. XII:, pp. 314-339, (ISBN: 3-540-23712-7)
    Publication Date: 1951
    Keywords: CRUST ; Earth model, also for more shallow analyses !
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  • 63
    Publication Date: 2018-06-05
    Description: As part of the program of flight tests of airplane propellers to determine compressibility effects at high speeds, preliminary flights have been made with a conventional three-blade propeller (Hamilton Standard 3155-6) on a Bell YP-39 airplane. This preliminary report presents the high-speed data obtained thus far with a brief analysis of the results.
    Keywords: Aerodynamics
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  • 64
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aerodynamics
    Type: NACA-RM-SL54F28
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  • 65
    Publication Date: 2019-06-28
    Description: The transonic similarity rules have been applied to the correlation of experimental data for a series of 22 rectangular wings having symmetrical NACA 63A-series sections, aspect ratios from 1/2 to 6, and thicknesses from 2 to 10 percent. The data were obtained by use of the transonic bump technique over a Mach number range from 0.40 to 1.10, corresponding to a Reynolds number range from 1.25 to 2.05 million. The results show that it is possible to correlate experimental data throughout the subsonic, transonic, and moderate supersonic regimes by using the transonic similarity parameters in forms which are consistent with the Prandtl-Glauert rule of linearized theory. The multiple families of basic data curves for the various aspect ratios and thickness ratios have been summarized in single presentations involving only one geometric variable - the product of the aspect ratio and the l/3 power of the thickness ratio.
    Keywords: Aerodynamics
    Type: NACA-RM-A51L17b
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  • 66
    Publication Date: 2019-06-28
    Description: Problems involved in the stability and control of tailless airplanes are discussed. Such factors as the location of the aerodynamic center and its effect on the longitudinal stability, longitudinal trim with high-lift devices, the effects of various changes in the shape of the wing on lateral stability, and the effects of nacelles are covered. It appears that sufficient stability and controllability can be secured without sweepback. With sweepback, a flap over the center section of the wing may be used to serve the dual purpose of elevator control and high-lift device. Sweepback introduces undesirable stalling characteristics, however, and may require auxiliary devices to prevent stalling of the tips.
    Keywords: Aerodynamics
    Type: NACA-TN-837
    Format: application/pdf
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  • 67
    Publication Date: 2019-06-28
    Description: Experiments have been made at Stanford University to determine the performance characteristics of plane-wall, two-dimensional diffusers which were so proportioned as to insure reasonable approximation of two-dimensional flow. All of the diffusers had identical entrance cross sections and discharged directly into a large plenum chamber; the test program included wide variations of divergence angle and length. During all tests a dynamic pressure of 60 pounds per square foOt was maintained at the diffuser entrance and the boundary layer there was thin and fully turbulent. The most interesting flow characteristics observed were the occasional appearance of steady, unseparated, asymmetric flow - which was correlated with the boundary-layer coalescence - and the rapid deterioration of flow steadiness - which occurred as soon as the divergence angle for maximum static pressure recovery was exceeded. Pressure efficiency was found to be controlled almost exclusively by divergence angle, whereas static pressure recovery was markedly influenced by area ratio (or length) as well as divergence angle. Volumetric efficiency. diminished as area ratio increased, and at a greater rate with small lengths than with large ones. Large values of the static-pressure-recovery coefficient were attained only with long diffusers of large area ratio; under these conditions pressure efficiency was high and. volumetric efficiency low. Auxiliary tests with asymmetric diffusers demonstrated that longitudinal pressure gradient, rather than wall divergence angle, controlled flow separation. Others showed that the addition of even a short exit duct of uniform section augmented pressure recovery. Finally, it was found that the installation of a thin, central, longitudinal partition suppressed flow separation in short diffusers and thereby improved pressure recovery
    Keywords: Aerodynamics
    Type: NACA-TN-2888
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  • 68
    Publication Date: 2019-06-28
    Description: An investigation was made of the flow downstream from a "two-dimensional" grid formed of parallel rods. In both two and three dimensional jet fields there is a critical range of grid density below which the downstream flow is stable and above which it is unstable. The flow can be completely stabilized by means of an adequate lateral contraction beginning immediately after the grid or by use of a fine-mesh damping screen parallel to the grid plane and within a definite range of positions downstream from the grid.
    Keywords: Aerodynamics
    Type: NACA-WR-W-90 , NACA-ACR-4H24
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  • 69
    Publication Date: 2019-06-28
    Description: Problem of improving thrust at low speeds is primarily one of reducing angle of attack of operation of sections to improve L/D or reducing blade helix angle. An analysis, based on recent propeller data, is presented for determining improvements in thrust or efficiency which could be obtained by increased number of blades, increased blade width, increased diameter, dual rotation, and two-speed gearing. All methods were found very effective, particularly two-speed gearing.
    Keywords: Aerodynamics
    Type: NACA-WR-L-483
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  • 70
    Publication Date: 2019-06-28
    Description: Test of a ducted body with Internal flow were made in the 8-foot high-speed wind tunnel for the purpose of studying the effects on external drag and an critical speed of the addition of efficient inlet and outlet openings to a basic streamline shape. Drag tests of a 13.6- inch-diameter streamline body of fineness ratio 6.14 were made at Mach numbers ranging from 0.20 to 0.75. The model was centrally mounted on a 9-percent-thick airfoil and was designed to have an efficient airfoil-body juncture and a high critical speed. An air inlet at the nose and various outlets at the tail were added: drag and internal-flow data were obtained over the given speed range. The critical speed of the ducted bodies was found to be as high as that of the streamline body. The external - drag with air flow through the body did not exceed the drag of the basic streamline shape. No appreciable variation in the efficiency of the diffuser section of the internal duct occurred throughout the Mach number range of the tests.
    Keywords: Aerodynamics
    Type: NACA-WR-L-486
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  • 71
    Publication Date: 2019-06-28
    Description: Data taken from tests at constant speed to establish trim limits of stability, tests at accelerated speeds to determine stable limits of center of gravity shift, and tests at decelerated speeds to obtain landing characteristics of several model hull forms were used to establish hull design effect on longitudinal stability of porpoising. Results show a reduction of dead rise angle as being the only investigated factor reducing low trim limit. Various methods of reducing afterbody interference increased upper trim limit
    Keywords: Aerodynamics
    Type: NACA-WR-L-468
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  • 72
    Publication Date: 2019-06-28
    Description: In order to determine the critical stresses caused by an outward acting pressure on the upper surface of a wing due to the difference in internal and external pressures, torsional tests were made on two curved-sheet specimens subjected to an outward acting normal pressure. Results show that an outward acting normal pressure appreciable raises the critical shear stress for an unstiffened curved sheet; the absolute increase in critical shear stress is slightly greater for a 30 in. rib spacing than for a 10 in. rib spacing.
    Keywords: Aerodynamics
    Type: NACA-WR-L-416
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  • 73
    Publication Date: 2019-06-28
    Description: Two airfoil plans were used for propeller blades. One is modified Clark Y section designed for structural reliability and the second an NACA 16 airfoil section designed to produce minimum aerodynamic losses. At low air speeds, the propeller designed for aerodynamic effects showed a gain of from 1.5 to 4.0 percent in propulsive efficiency over the conventional type depending on the pitch. Because of the numerous variables involved, the effect of each one on the aerodynamic characteristics of the propellers could not be isolated.
    Keywords: Aerodynamics
    Type: NACA-WR-L-404
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  • 74
    Publication Date: 2019-06-28
    Description: Description is given of flight tests conducted on gun fairings, designed to correct the detrimental effects of the projecting and submerged wing guns on an F4F-3 fighter. It was found that the installation of unfaired guns on a clean wing resulted in a premature stall that increased the stalling speed in the carrier-approach and landing conditions of flight by suitably fairing the guns, it was possible to reduce the stalling speeds to values approaching very nearly the clean-wing values.
    Keywords: Aerodynamics
    Type: NACA-WR-L-247
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  • 75
    Publication Date: 2019-06-28
    Description: Porpoising characteristics were observed on V-body fitted with tail surfaces for different combinations of load, speed, moment of inertia, location of pivot, elevator setting, and tail area. A critical trim was found which was unaltered by elevator setting or tail area. Critical trim was lowered by moving pivot either forward or down or increasing radius or gyration. Increase in mass and moment of inertia increased amplitude of oscillations. Complete results are tabulated and shown graphically.
    Keywords: Aerodynamics
    Type: NACA-WR-L-479
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  • 76
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aerodynamics
    Type: NACA-WR-L-702
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  • 77
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aerodynamics
    Type: NACA-WR-L-493
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  • 78
    Publication Date: 2019-06-28
    Description: Pressure distribution measurements were made over an airfoil with slotted Frise aileron up to 0.76 Mach at various angles of attack and aileron defections. Section characteristics were determined from these pressure data. Results indicated loss of aileron rolling power for deflections ranging from -12 Degrees to -19 Degrees. High stick forces for non-differential deflections incurred at high speed, which were due to overbalancing tendency of up-moving aileron, may precipitate serious control difficulties. Detailed results are presented graphically.
    Keywords: Aerodynamics
    Type: NACA-WR-L-266 , NACA-ACR-L4G12
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  • 79
    Publication Date: 2019-06-28
    Description: Recent developments in airfoil-testing methods and fundamental air-flow investigations, as applied to airfoils, are discussed. Preliminary test results, obtained under conditions relatively free from stream turbulence and other disturbances, are presented. Suitable airfoils and airfoil-design principles were developed to take advantage of the unusually extensive laminar boundary layers that may be maintained under the improved testing conditions. The results are of interest mainly in range of below 6,000,000.
    Keywords: Aerodynamics
    Type: NACA-WR-L-345
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  • 80
    Publication Date: 2019-06-28
    Description: Methods are given of determining the potential flow plast an arbitrary cascade of airfoils and the inverse problem of determining an airfoil having a prescribed velocity distribution in cascade. Results indicated that Cartesian mapping function method may be satisfactorily extended to include cascades. Numerical calculation for computing cascades by Cartesian mapping function method is considerably greater than for single airfoils but much less than hitherto required for cascades. Detailed results are presented graphically.
    Keywords: Aerodynamics
    Type: NACA-WR-L-81 , NACA-ARR-L4K22B
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  • 81
    Publication Date: 2019-06-28
    Description: Flight tests were conducted on the OS2U-2 seaplane with simple circular-arc-type ailerons directly connected to the actuating torque tube. Two aileron test installations were made, differing only in the inclination of the projecting surface with the wing's upper surface. The lateral-control characteristics of the airplane were determined from data obtained in stalls and rudder-fixed aileron rolls. The revised ailerons were deficient in maximum rolling effectiveness, but were capable of controlling the rolling tendencies of the airplane near the stall.
    Keywords: Aerodynamics
    Type: NACA-WR-A-32
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  • 82
    Publication Date: 2019-06-28
    Description: The pitching and the yawing moments of a vee-type and a conventional type of tail surface were measured. The tests were made in the presence of a fuselage and a wing-fuselage combination in such a way as to determine the moments contributed by the tail surfaces. The results showed that the vee-type tail tested, with a dihedral angle of 35.3 deg, was about 71 percent as effective in pitch as the conventional tail and had a yawing-moment to pitching-moment ratio of 0.3. The conventional tail, the panels of which were all congruent to those of the vee-type tail, had a yawing-moment to pitching-moment ratio of 0.48. These ratios are in fair agreement with values calculated by methods shown in this and previous reports. The values of the measured moments were reduced from 15 to 25 percent of the calculated value by fuselage interference.
    Keywords: Aerodynamics
    Type: NACA-TN-815
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  • 83
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: Simultaneous air-flow photographs and pressure-distribution measurements have been made of the NACA 4412 airfoil at high speeds in order to determine the physical nature of the compressibility burble. The flow photographs were obtained by the Schlieren method and the pressures were simultaneously measured for 54 stations on the 5-inch-chord wing by means of a multiple-tube photographic manometer. Pressure-measurement results and typical Schlieren photographs are presented. The general nature of the phenomenon called the "compressibility burble" is shown by these experiments. The source of the increased drag is the compression shock that occurs, the excess drag being due to the conversion of a considerable amount of the air-stream kinetic energy into heat at the compression shock.
    Keywords: Aerodynamics
    Type: NACA-TN-543
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  • 84
    Publication Date: 2019-06-28
    Description: A method is presented for the estimation of the subsonic-flight-speed characteristics of sharp-lip inlets applicable to supersonic aircraft. The analysis, based on a simple momentum balance consideration, permits the computation of inlet pressure recovery - mass-flow relations and additive-drag coefficients for forward velocities from zero to the speed of sound. The penalties for operation of a sharp-lip inlet at velocity ratios other than 1.0 may be severe; at lower velocity ratios an additive drag is incurred that is not cancelled by lip suction, while at higher velocity ratios, unavoidable losses in inlet total pressure will result. In particular, at the take-off condition, the total pressure and the mass flow for a choked inlet are only 79 percent of the values ideally attainable with a rounded lip. Experimental data obtained at zero speed with a sharp-lip supersonic inlet model were in substantial agreement with the theoretical results.
    Keywords: Aerodynamics
    Type: NACA-TN-3004
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  • 85
    Publication Date: 2019-06-28
    Description: Wake development behind circular cylinders at Reynolds numbers from 40 to 10,000 was investigated in a low-speed wind tunnel. Standard hotwire techniques were used to study the velocity fluctuations. The Reynolds number range of periodic vortex shedding is divided into two distinct subranges. At R = 40 to 150, called the stable range, regular vortex streets are formed and no turbulent motion is developed. The range R = 150 to 300 is a transition range to a regime called the irregular range, in which turbulent velocity fluctuations accompany the periodic formation of vortices. The turbulence is initiated by laminar-turbulent transition in the free layers which spring from the separation points on the cylinder. This transition first occurs in the range R = 150 to 300. Spectrum and statistical measurements were made to study the velocity fluctuations. In the stable range the vortices decay by viscous diffusion. In the irregular range the diffusion is turbulent and the wake becomes fully turbulent in 40 to 50 diameters downstream. It was found that in the stable range the vortex street has a periodic spanwise structure. The dependence of shedding frequency on velocity was successfully used to measure flow velocity. Measurements in the wake of a ring showed that an annular vortex street is developed.
    Keywords: Aerodynamics
    Type: NACA-TN-2913
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  • 86
    Publication Date: 2019-06-28
    Description: A supersonic inlet with supersonic deceleration of the flow entirely outside of the inlet is considered. A particular arrangement with fixed geometry having a central body with a circular annular intake is analyzed, and it is shown theoretically that this arrangement gives high pressure recovery for a large range of Mach number and mass flow and therefore is practical for use on supersonic airplanes and missiles. For some Mach numbers the drag coefficient for this type of inlet is larger than the drag coefficient for the type of inlet with supersonic compression entirely inside, but the pressure recovery is larger for all flight conditions. The differences in drag can be eliminated for the design Mach number. Experimental results confirm the results of the theoretical analysis and show that pressure recoveries of 95 percent for Mach numbers of 1.33 and 1.52, 92 percent for a Mach number of 1.72, and 86 percent for a Mach number of 2.10 are possible, with the configurations considered. If the mass flow decreases, the total drag coefficient increases gradually and the pressure recovery does not change appreciably. The results of this work were first presented in a classified document issued in 1946.
    Keywords: Aerodynamics
    Type: NACA-TN-2286
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  • 87
    Publication Date: 2019-06-28
    Description: The hypersonic similarity law as derived by Tsien has been investigated by comparing the pressure distributions along bodies of revolution at zero angle of attack. In making these comparisons, particular attention was given to determining the limits of Mach number and fineness ratio for which the similarity law applies. For the purpose of this investigation, pressure distributions determined by the method of characteristics for ogive cylinders for values of Mach numbers and fineness ratios varying from 1.5 to 12 were compared. Pressures on various cones and on cone cylinders were also compared in this study. The pressure distributions presented demonstrate that the hypersonic similarity law is applicable over a wider range of values of Mach numbers and fineness ratios than might be expected from the assumptions made in the derivation. This is significant since within the range of applicability of the law a single pressure distribution exists for all similarly shaped bodies for which the ratio of free-stream Mach number to fineness ratio is constant. Charts are presented for rapid determination of pressure distributions over ogive cylinders for any combination of Mach number and fineness ratio within defined limits.
    Keywords: Aerodynamics
    Type: NACA-TN-2250
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  • 88
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Aerodynamics
    Type: NACA-TN-2211
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  • 89
    Publication Date: 2019-06-28
    Description: Tests were made in 8-ft high-speed wind tunnel to determine the drag reduction possible by eliminating the barrel jacket of a protruding 50-caliber aircraft gun. It was found that the drag of a standard aircraft gun protruding into the air stream at right angles to the flow can be reduced by 23% by discarding the barrel jacket. At 300 mph and sea-level conditions, this amounts to a decrease in drag of from 83 to 64 pounds. A rough surface finish on the barrel was found to have no adverse effects on the drag of the barrel, the drag being actually less at high Mach Numbers.
    Keywords: Aerodynamics
    Type: NACA-WR-L-581
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  • 90
    Publication Date: 2019-06-28
    Description: Tank tests were made of a hull model of the Hughes-Kaiser cargo airplane for estimates of take-off performance and maximum gross load for take-off. At hump speeds, with the model free to trim, the trim and resistance were high, which resulted in a load-resistance ratio of approximately 4.0 for a gross load coefficient of 0.75. With a 4000,000-lb load, the full size craft may take off in 69 sec over a distance of 5600 ft.
    Keywords: Aerodynamics
    Type: NACA-WR-L-683
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  • 91
    Publication Date: 2019-06-28
    Description: Tests were conducted on hydrofoil assemblies approximating an arrangement for use under seaplanes or surface boats. A series of hydrofoils, each supported by two struts, was towed at various depths ranging from partial submersions to a depth of 5-chord lengths. At depths greater than 4 or 5 chords, the influence of the surface of the water is small; hydrofoils operating at low speed will have characteristics similar to those of airfoils of the same section.
    Keywords: Aerodynamics
    Type: NACA-WR-L-758
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  • 92
    Publication Date: 2019-06-28
    Description: Several tail modifications of the Brewster XSBA-1 scout-bomber were investigated and results compared. Modifications consisted of variation of the chord of the elevator and rudder while the total area of the surfaces is kept constant and variations of the total area of the vertical tail surface. Configuration number 2 reduced trim changes by 50 percent and reduced average elevator control force gradient from 30 to 27 pounds/g. Stick travel required to stall in maneuver was 4.6 inches.
    Keywords: Aerodynamics
    Type: NACA-WR-L-598
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  • 93
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: Analysis was made to determine characteristics required of a balancing-tab system for ailerons in order to reduce aileron stick forces to any desired magnitude. Series of calculations based on section data were made to determine balancing-tab systems of various chord tabs and ailerons that will give, for a particular airplane, zero rate of aileron hinge moment with aileron deflection and yet will produce same maximum rate of roll as a plain unbalanced 15-percent chord aileron of same span. Effects of rolling velocity and of forces in tab link on aileron hinge moments have been included.
    Keywords: Aerodynamics
    Type: NACA-WR-L-346
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  • 94
    Publication Date: 2019-06-28
    Description: Results of flight tests indicate that profile-drag coefficients which were obtained with the low-drag airfoils were lower than with the conventional types over the range of light coefficients tested. For comparable conditions of the lift coefficient and Reynolds Number, the low-drag airfoils have profile-drag coefficients which may be 27 percent lower than the profile drag of the conventional airfoils tested. Detailed results are presented graphically.
    Keywords: Aerodynamics
    Type: NACA-WR-L-139 , NACA-ACR-L4E31
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  • 95
    Publication Date: 2019-06-28
    Description: Rough conventional, smooth conventional, and laminar-flow or low-drag sections were tested. The items covered are rotor thrust for fixed power in hovering, range and endurance at cruising speed, and power required at high-forward speed. Calculations indicated that a smooth conventional section gives marked performance gains. Smaller gains are obtainable by using a low-drag section. At high speeds or loads the low-drag section is inferior to the smooth conventional section.
    Keywords: Aerodynamics
    Type: NACA-WR-L-26 , NACA-ACR-L4H05
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  • 96
    Publication Date: 2019-06-28
    Description: Tests of 10-ft. diameter, eight-blade, single - and dual - rotating propellers were conducted in 20-ft propeller research tunnel. Propellers were mounted at front end of a streamline body in spinners that covered hubs and parts of shanks. Effect of a symmetrical wing mounted in slipstream was investigated. Blade-angle settings ranged from 20 Degrees to 65 Degrees. Results indicated that dual rotation resulted in gains of from 1 to 8 percent in efficiency over single rotation for eight-blade propellers, but presence of a wing reduced gain about one-half. Greater power absorption caused by dual rotation over flight range and higher efficiency or thrust for range of take-off and climb was indicated
    Keywords: Aerodynamics
    Type: NACA-WR-L-384
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  • 97
    Publication Date: 2019-06-28
    Description: An investigation was made of the cooling characteristics of a P and W R-2800 engine with NACA short-nose high inlet-velocity cowling. The internal aerodynamics of the cowling were studied for ranges of propeller-advance ratio and inlet-velocity ratio obtained by deflection of cowling flaps. Tests included variations of engine power, fuel/air ratio and cooling-air pressure drop. Engine cooling data are presented in the form of cooling correlation curves, and an example for calculation of cooling requirements in flight is included.
    Keywords: Aerodynamics
    Type: NACA-WR-L-207 , NACA-ACR-L4F06
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  • 98
    Publication Date: 2019-06-28
    Description: Investigations were undertaken to improve the ailerons of a P-51 fighter so as to obtain greater effectiveness without increasing the stick forces. Modifications consisted of increasing the deflection range of the aileron to 70 percent and changing the original concave section to a thick section with beveled trailing edge. Results of the modified ailerons showed an increase in effectiveness over the original aileron of 70 percent at low speed and 55 percent at high speeds.
    Keywords: Aerodynamics
    Type: NACA-WR-L-636
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  • 99
    Publication Date: 2019-06-28
    Description: Hinge-moment, lift, and pressure-distribution measurements were made in the two-dimensional test section of the NACA stability tunnel on a blunt-nose balance-type aileron on an NACA 66,2-216 airfoil at speeds up to 360 miles per hour corresponding to a Mach number of 0.475. The tests were made primarily to determine the effect of speed on the action of this type of aileron. The balance-nose radii of the aileron were varied from 0 to 0.02 of the airfoil chord and the gap width was varied from 0.0005 to 0.0107 of the airfoil chord. Tests were also made with the gap sealed.
    Keywords: Aerodynamics
    Type: NACA-WR-L-431 , NACA-ACR-3F11
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  • 100
    Publication Date: 2019-06-28
    Description: Aerodynamics data are obtained for the design of linked balancing tabs and effect of varied tab span and location to produce suitable lateral control characteristics with reasonable stick pressures for high-speed aircraft. Simple and spring-linked balancing tabs may considerably reduce control pressures if aileron system is designed for low maximum aileron deflection. Spring-linked tabs also decrease variation of stick pressure with speed and impart better controlllability at low speeds.
    Keywords: Aerodynamics
    Type: NACA-WR-L-470
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