ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Other Sources  (810)
  • 1925-1929
Collection
Language
Years
Year
  • 1
    facet.materialart.
    Unknown
    Hessisches Landesamt für Bodenforschung, Darmstadt
    In:  SUB Göttingen | KART B 104:5421 | KART H 86:5421
    Publication Date: 2023-02-14
    Description: Geologische Karte 1: 25 000 mit Erläuterungen. Digitalisat des FID GEO (Fachinformationsdienst Geowissenschaften), erstellt durch das GDZ (Göttinger Digitalisierungszentrum), Karte aus dem Bestand der SUB Göttingen.
    Description: DFG, SUB Göttingen
    Description: map
    Description: DFG, SUB Göttingen
    Keywords: ddc:912 ; ddc:554.3 ; ddc:943.2 ; Ulrichstein ; Geologische Karte
    Language: German
    Type: doc-type:carthographicMaterial
    Format: 109
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    facet.materialart.
    Unknown
    In:  Gerlands Beiträge zur Geophysik, Milano, Gustav Fischer, vol. 24, no. 3, pp. 76, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Geothermics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    facet.materialart.
    Unknown
    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12 + 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 151-263, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Review article ; Seismology ; Instruments ; Seismometer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    facet.materialart.
    Unknown
    In:  Scientia, Milano, Gustav Fischer, vol. 23, no. 3, pp. 375-384, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Geothermics ; Seismicity ; Tectonics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    Unknown
    In:  Gerlands Beiträge zur Geophysik, Milano, Gustav Fischer, vol. 23, no. 3, pp. 22-34, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Earthquake
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    In:  Physikalische Zeitschrift, Milano, Gustav Fischer, vol. 30, no. 3, pp. 230-231, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Elasticity ; Waves ; Inelastic ; Fluids
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    facet.materialart.
    Unknown
    In:  Gerlands Beiträge zur Geophysik, Milano, Gustav Fischer, vol. 22, no. 3, pp. 100-102, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Seismology ; Seismometer ; Nearfield
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    facet.materialart.
    Unknown
    In:  Natur und Museum, Milano, Gustav Fischer, vol. 59, no. 3, pp. 477-487, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1929
    Keywords: Tectonics ; Earth model, also for more shallow analyses !
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 1929
    Description: Ergebnisse (Rangordungs- und Korrelationsmethode) der Beziehung zwischen Witterung und Ertrag vieler Kulturen eingeteilt nach Monaten KATASTER-BESCHREIBUNG: Einfluss der Temperatur und des Niederschlags auf den Ertrag folgender Kulturpflanzen: Winterweizen, Winterroggen, Dinkel, Sommerweizen, Sommerroggen, Sommergerste, Hafer, Hopfen, Luzerne, Rotklee, Wiesen, Kartoffeln) KATASTER-DETAIL: Delta T (Vegetationszeit) -, dann Ertrag (Winter- und Sommergetreide) +; Delta T (Winter, Juni und Juli) -, dann Ertrag (Sommergetreide) +; Delta Nied (Winter) +, dann Ertrag (Getreide) -; Delta T (September) - und Delta Nied (Vegetationszeit) +, dann Ertrag (Futterpflanzen) +; Details für einzelne Kulturpflanzen: siehe Artikel
    Keywords: Württemberg ; 1899-1913 ; Ertrag ; Hafer ; Korrelationsmethode ; Niederschlag ; Rangordnungsmethode ; Temperatur ; Weizen ; Witterung
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    facet.materialart.
    Unknown
    In:  Wisss.Arch. Landw. Abt. A, Pflanzenbau 1:273-329.
    Publication Date: 1929
    Description: Untersuchungen zum Zusammenhang zwischen Klima und Landwirtschaft KATASTER-BESCHREIBUNG: Einfluss der Temperatur, Sonnenscheindauer, Niederschlag und Wind auf das Pflanzenwachstum KATASTER-DETAIL: Delta T -, dann Ertrag -; Delta Nied +, dann Ertrag (Hafer) +; Delta Sonn (September) +, dann Zuckergehalt (Rüben) +; Delta Nied - und Delta T +, Roggenanbaufläche 〉 Haferanbaufläche; Delta Nied (Sommer) +, dann Qualität Getreide -; Delta Nied (Juni, Juli) +, dann Ertrag (Kartoffeln) +; Delta T (Frühjahr) -, dann Saatkartoffeln +; Delta Nied +, dann Umfang Kleeflächen +;
    Keywords: Schlesien ; 1910-1914 ; Landwirtschaft ; Niederschlag ; Temperatur ; Wind ; Sonnenscheindauer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 11
    facet.materialart.
    Unknown
    In:  Weinbau und Kellerwirtschaft, 8. Jahrgang, Nr. 19, p. 183-186
    Publication Date: 1929
    Description: Bericht über die Beobachtungen zur Frostresistenz von Insekten KATASTER-BESCHREIBUNG: Frosteinwirkung scheint die Entwicklung der Insekten nicht zu behindern KATASTER-DETAIL: -
    Keywords: Baden ; 1928-1929 ; Insekten ; Forst ; Pflanzenschädling
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 12
    Publication Date: 1929
    Description: Einfluss der Witterung ist Gattungs- teils sortenabhängig, und wechselt mit der Lage der Orte. Trockenheit im Vorjahr begünstigt die Ernteerträge, KATASTER-BESCHREIBUNG: Trockenheit im Vorjahr begünstigt verbunden mit hoher Temperatur, geringer Luftfeuchtigkeit und langer Sönnenscheindauer, mit niedriger Temperatur, hoher Luftfeuchte, kurzer Sonnenscheindauer im Erntejahr, wirkt positiv auf die Ernteerträge für bestimmte Apfel - und Birnensorten, umgekehrte Beziehung insbesondere bei Früh-, Herbst- und Winterbirnensorten KATASTER-DETAIL:
    Keywords: Niedersachsen ; 1900-1923 ; Apfel ; Ertrag ; Trockenheit ; Witterung ; Obst ; Birne
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 13
    Publication Date: 1929
    Description: vgl. Neustädt KATASTER-BESCHREIBUNG: Zusammenhang Witterungsfaktoren in wachstumsrelevanten Zeitspannen mit dem Ertrag verschiedener Kulturen KATASTER-DETAIL: Delta Nied (Oktober bis März) -, dann Erträge (Roggen) +; Delta Nied (Januar) -, dann Erträge (Roggen) ++; Delta Nied (Februar) +, dann Erträge (Roggen) +; Delta Nied (Mai) +, dann Erträge (Roggen) +; Delta Nied (Mai) 〉 1,5x Mittel, dann Erträge -; Delta Sonn (Mai, im Bezirk Köthen) +, dann Erträge (Roggen) -; Delta Nied (Januar, März, April) -, dann Erträge (Sommergerste) +; Delta Nied (Februar, Mai bis Ernte) +, dann Erträge (Sommergerste) +; Delta Nied (Mai) +, dann Erträge (Sommergerste) ++; (Informationen zu den weiteren landwirtschaftlicher Kulturpflanzen: siehe Artikel)
    Keywords: Mitteldeutschland ; 1900-1926 ; Kartoffeln ; Ertrag ; Niederschlag ; Roggen ; Temperatur ; Witterung ; Hackfrüchte
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 14
    Publication Date: 1929
    Description: Einfluß der Witterung auf die Qualität von Weizen KATASTER-BESCHREIBUNG: Witterungsverhältnisse der letzten 5 bis höchstens 10 Tage vor der Gelbreife sind von entscheidendem Einfluss, Backqualität nimmt von kontinentalem zum maritimen Klima ab KATASTER-DETAIL: Tmit+, Sonn+, Nied-, dann gute Qualität Nied+, dann Tausendkorngewicht + aber Nied**, dann Tausendkorngewicht - und N-Gehalt +
    Keywords: Mitteldeutschland ; 1900-1925 ; Ertrag ; Korrelationsmethode ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Weizen ; Witterung ; Sonnenscheindauer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 15
    facet.materialart.
    Unknown
    In:  Buch von: Höhne, E., (1919): Landwirtschaftlich-klimatologische Untersuchung des Gebietes zwiwchen mittlerer Saale und Pleiße und Einteilung in klimatische Unterbezirke auf Grund der Beziehungen zwischen Witterungsfaktoren und Ernteerträgen
    Publication Date: 1929
    Description: Untersuchung zur Beziehung zwischen Witterungsfaktoren und Ernteerträgen in verschiedenen Untersuchungsgebieten mittels Rangordnungsdifferenzen. Betrachtet wurden die Erträge von Roggen, Winterweizen, Sommergerste, Hafer, Sommerweizen, Zuckerrübe, Kartoffel und Erbse KATASTER-BESCHREIBUNG: Einfluss der Witterung (Niederschlag, Temperatur, Sonnenschein) auf die Erträge KATASTER-DETAIL: Delta Nied (Oktober bis März) -, dann Erträge (Roggen) +; Delta Nied (Januar) -, dann Erträge (Roggen) ++; Delta Nied (Februar) +, dann Erträge (Roggen) +; Delta Nied (Mai) +, dann Erträge (Roggen) +; Delta Nied (Mai) 〉 1,5x Mittel, dann Erträge -; Delta Sonn (Mai, im Bezirk Köthen) +, dann Erträge (Roggen) -; Delta Nied (Januar, März, April) -, dann Erträge (Sommergerste) +; Delta Nied (Februar, Mai bis Ernte) +, dann Erträge (Sommergerste) +; Delta Nied (Mai) +, dann Erträge (Sommergerste) ++; Köthen (Nied 15-30mm im März), (Delta T- im April/Juni, besonders im Mai), dann Winterweizenertrag++ (weitere Informationen zu den weiteren landwirtschaftlicher Kulturpflanzen und Regionen: siehe Artikel)
    Keywords: Sachsen und Thüringen ; 1899-1926 ; Boden ; Ertrag ; Getreide ; Klima ; Korrelationsmethode ; Landwirtschaft ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Globalstrahlung ; Hackfrüchte
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 16
    facet.materialart.
    Unknown
    In:  Zeitschrift für Pflanzenernährung, Düngung, Bodenkunde 8:425-458
    Publication Date: 1929
    Description: Auswirkungen über gestaffelte Stickstoff-Düngung auf den Ertrag von Weizen, Gerste, Roggen und Hafer. Angaben zu Temperatur und Niederschlag während der Vegetationszeit, Hinweise auf Zusammenhang zwischen Witterung und Ertrag und Wirkung der Düngung, Bedeutung eines längeren Zeitraums für die Beobachtungen KATASTER-BESCHREIBUNG: Einfluss von Niederschlag und Temperatur auf den Ertrag von Hafer KATASTER-DETAIL: Delta Nied (nach der Saat) +, dann t(Aufgang) - (später); Delta Nied (Ende des Wachstum) -, dann Erträge (Hafer) -; Delta T (20 Tage nach dem Aufgang) +: T 〉 11°C, dann Ertrag (Hafer) -;
    Keywords: Bayern ; 1924-28 ; Ertrag ; Getreide ; Hafer ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Düngung ; Gerste
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 17
    facet.materialart.
    Unknown
    In:  Arb. der Biol. Reichsanstalt Land. und Forstwissenschaft 17:423-434.
    Publication Date: 1929
    Description: Zusammenhang zwischen Temperatur, Sonnenscheindauer und Niederschlag und die Auswirkungen auf Parasiten im Obstbau KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Niederelbe ; 1896-1928 ; Niederschlag ; Pflanzenkrankheit ; Pflanzenschädling ; Temperatur ; Obst ; Parasit
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 18
    facet.materialart.
    Unknown
    In:  Landw. Jahrbuch 68:537-558
    Publication Date: 1929
    Description: Untersuchungen der Beziehungen zwischen Pferdebohne (Vicia faba L.) und der Witterung. Einteilung des Wachstums in Abschnitte KATASTER-BESCHREIBUNG: Einfluss der Witterung auf die Entwicklung und den Ertrag der Pferdebohne KATASTER-DETAIL: Delta T + und Delta Sonn +, dann Reife + (früher); Delta T +, dann 1. Wachstumsabschnitt (vom Auflaufen bis zum Blütebeginnn) - (kürzer); Delta T + und Delta Sonn +, dann 3. Wachstumsabschnitt (Reifezeit) - (kürzer); Delta T +, dann Gesamtwachstumszeit +; Delta Nied +, dann Gesamtwachstumszeit -; Delta T (Gesamtwachstumszeit,Jugendzeit) +, dann Kornzahl +; Delta Sonn (Blütezeit) +, dann Kornzahl +; Delta Nied +, dann Kornzahl -; Delta T (Reifezeit) - und Delta Nied (Reifezeit) +, dann Pilzbefall + und somit Kornzahl -; Delta T +, dann Kornschwere -; Delta Nied (10 Tage vor bis 10 Tage nach Blütenende) +, dann Kornschwere +; Delta T +, dann Hülsenzahl +; Delta Nied +, dann Hülsenzahl -; Delta Nied (alle Wachstumszeiten) + und Delta T (bis zum Blütenende) + und Delta Sonn -, dann Strohgewicht +;
    Keywords: Freising, Bayern ; 1921-1926 ; Ertrag ; Witterung ; Gemüse
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 19
    Publication Date: 1929
    Description: Auswirkungen des Frostes auf Süsskirschen KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Mitteldeutschland ; 1928-29 ; Frost ; Obst
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 20
    Publication Date: 1929
    Description: Einfluss der Witterungsfaktoren auf verschiedene Kulturen und die Betriebssysteme KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Witterung
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 21
    Publication Date: 1929
    Description: Der Autor schildert beobachtete Falter, Puppen, Raupen und Eier aus dem Jahr 1929 und kommt durch ihr häufiges Auftreten zu dem Schluß, daß der extrem kalte Winter keine schädigende Wirkung auf diese hatte. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Oberschlesien, Falkenberg ; 1929
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 22
    facet.materialart.
    Unknown
    In:  Deutsche Landwirtschaftliche Presse, 56. Jahrgang, Nr. 37, p. 528-529
    Publication Date: 1929
    Description: Allgemeine Beobachtungen zum Verlauf der Krankheit sowie Beschreibung des Schadbildes KATASTER-BESCHREIBUNG: - KATASTER-DETAIL: -
    Keywords: Kempen, Nordrhein-Westfalen ; 1929 ; Ertrag ; Hafer ; Pflanzenkrankheit
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 23
    Publication Date: 1929
    Description: Einfluß der Witterung auf das Auftreten von Rübenaaskäfer, Zwergzikade, Ackerschnecke, Weizenhalmfliege, Getreideblumenfliege KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland, regional aufgelöst ; 1893-1927 ; Getreide ; Pflanzenschädling ; Hackfrüchte
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 24
    facet.materialart.
    Unknown
    In:  Kühn-Archiv 20:140-222.
    Publication Date: 1929
    Description: Untersuchungen an Ernteergebnissen mittels Rangordnungs- und Korrelationsmethode zur Abhängigkeit von den Witterungsfaktoren. Untersucht wurden die Erträge von Weizen, Roggen, Sommergerste, Hafer, Erbsen und Zuckerrüben KATASTER-BESCHREIBUNG: Einfluss der Witterung (Temperatur, Niederschlag, Sonnenscheindauer) auf die Erträge der Kurlturpflanzen KATASTER-DETAIL: Delta T (Oktober, November) - und Delta T (Januar, Februar) +, dann Erträge (Weizen) +; Delta Nied (April, Mai) + und Delta Nied (Februar, März) -, dann Erträge (Weizen) +; Delta Sonn (März) +, dann Erträge (Weizen) +; Delta Nied (Mai - Zeit des Schossens) +, dann Erträge (Roggen) +; Delta T (November) -, dann Erträge (Roggen) +; Delta Nied (April, Juni) + und Delta T (April, Juni) -, dann Erträge (Sommergerste) +; Nied (April, Juni) 〉 180mm, dann Erträge (Sommergerste) -; Delta Sonn (März, April) + und Delta Sonn (Mai) -, dann Erträge (Sommergerste) +; Delta Nied (April bis Juni) +, dann Erträge (Hafer) +; Delta Sonn (März, April) +, dann Erträge (Hafer) +; Delta T (Juni) -, dann Erträge (Hafer) +; Delta Nied (Juni, September) +, dann Erträge (Zuckerrübe) +; Delta Nied (August) +, Zuckergehalt +; Delta T (Juni) +, dann Erträge (Zuckerrübe) +; Delta Sonn (September) +, Qualität der Ernte +; Delta Sonn (März, April) + und Delta Sonn (Mai, Juni) -, dann Erträge (Getreide) +;
    Keywords: Mansfelder See- und Saalkreis, Kreis Querfurt, Kreis Merseburg ; 1900-1925 ; Zuckerrüben ; Hafer ; Niederschlag ; Roggen ; Temperatur ; Weizen ; Witterung ; Sonnenscheindauer ; Gerste ; Erbsen
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 25
    facet.materialart.
    Unknown
    In:  Sächs. Landw. Zeitschr. 77; p.34-35
    Publication Date: 1929
    Description: Allgemeine Diskussion über die Abhängigkeit verschiedener Schadinsekten von meteorologischen Faktoren.es werden bekannte Informationen zusammengefasst und erklärt. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Sachsen ; 1900-1928 ; Pflanzenschädling
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 26
    Publication Date: 1929
    Description: Lage der Hochs nördlich und südlich des 50. Breitengrades und ihre Bedeutung für die Witterung und Ernteerträge in Mitteldeutschland KATASTER-BESCHREIBUNG: KATASTER-DETAIL: Tmit+ (Janurar, Februar, März, Mai und Dezember) durch Abnahem der barometrischen Nordlagen Tmit- (August, September) durch Zunahme der barometrischen Nordlagen Nied+ (Janurar, Apri,, Mai, August, September, Dezember) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!) Nied- (Februar, März, Oktober und November) durch Abnahmen der barometrischen Nordlagen (entspricht Zunahmen der Südlagen!)
    Keywords: Deutschland ; 1900-1925 ; Luftfeuchte ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Temperatur ; Trockenheit ; Witterung ; Sonnenscheindauer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 27
    facet.materialart.
    Unknown
    Bornträger
    In:  Berlin, Bornträger, vol. 12, 189 S., no. Subvol. b, pp. 220, (ISBN 0-12-305355-2)
    Publication Date: 1929
    Keywords: Handbook of geophysics
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 28
    facet.materialart.
    Unknown
    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12+ 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 264-298, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Seismology ; NOISE
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 29
    facet.materialart.
    Unknown
    Bornträger
    In:  Professional Paper, Handbuch der Geophysik, Volume 4: Erdbeben (finished), 12 + 1202 S., Berlin, Bornträger, vol. 3, no. VIIa, pp. 1-150, (ISBN: 3-540-23712-7)
    Publication Date: 1929
    Keywords: Review article ; Seismology ; Waves ; Wave propagation
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 30
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: Part I describes vibration tests, in a wind tunnel, of simple airfoils and of the tail plane of an M0-1 airplane model; it also describes the air flow about this model. From these tests are drawn inferences as to the cause and cure of aerodynamic wing vibrations. Part II derives stability criteria for wing vibrations in pitch and roll, and gives design rules to obviate instability. Part III shows how to design spars to flex equally under a given wing loading and thereby economically minimize the twisting in pitch that permits cumulative flutter. Resonant flutter is not likely to ensue from turbulence of air flow along past wings and tail planes in usual flying conditions. To be flutterproof a wing must be void of reversible autorotation and not have its centroid far aft of its pitching axis, i. e., axis of pitching motion. Danger of flutter is minimized by so proportioning the wing's torsional resisting moment to the air pitching moment at high-speed angles that the torsional flexure is always small. (author)
    Type: NACA-TR-285
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 31
    Publication Date: 2019-06-28
    Description: For aircraft engines the three principal operating conditions are idling speed, cruising speed, and diving with the engine stopped. In what follows, we will discuss a method which affords a good idea of the course of pressure for the above mentioned operating conditions. The pressures produced in the driving gear are of three kinds; namely, the pressure due to gases, the pressure due to the inertia of the rotating masses, and the pressure due to the inertia of the reciprocating masses.
    Type: NACA-TM-543
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 32
    Publication Date: 2019-06-28
    Description: In order to understand the numerical relations between the air velocity, temperature of the cylinder walls, heat dissipation, cylinder dimensions and type of construction an experimental plant was installed in the Siemens and Halske laboratory. The experimental cylinder was exposed to the air stream of a wind tunnel. The compression chamber was heated by an electrically heated oil bath kept constantly in motion by a stirrer. The wall temperatures were measured by thermocouples. The air stream was produced a seven-watt blower. The air flowed through a current rectifier (honeycomb), diffuser, air chamber with quieting sieves and a nozzle.
    Type: NACA-TM-540
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 33
    Publication Date: 2019-06-28
    Description: The present report deals with a series of tests made for the purpose of improving flow conditions about wings by applying the suction principle (increase of the lift coefficient and reduction of the drag about very thick wing sections). Though not conclusive, the report contains interesting results.
    Type: NACA-TM-534
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 34
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: It would appear that welds in some stainless steels, heat-treated in some practicable way, will probably be found to have all the resistance to corrosion that is required for aircraft. Certainly these structures are not subjected to the severe conditions that are found in chemical plants.
    Type: NACA-TM-532
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 35
    Publication Date: 2019-06-28
    Description: The recent trial flights and acceptance tests of the Rohrbach "Romar," the largest seaplane in the world, have yielded results fully confirming the principles followed in its development. Its take-off weight of 19,000 kg, its beating the world record for raising the greatest useful load to 2000 m by almost 2500 kg and its remarkable showing in the seaworthiness tests are the results of intelligent researches, the guiding principles of which are briefly set forth in this article.
    Type: NACA-TM-541
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 36
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: This part of the report presents a detailed examination of spark prevention, fire extinguishers, and fuel tank location and design. A continued program of investigations and research is also proposed.
    Type: NACA-TM-537
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 37
    Publication Date: 2019-06-28
    Description: Strip metal construction of wing spars are presented as well as workshop practices.
    Type: NACA-TM-528
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 38
    Publication Date: 2019-06-28
    Type: NACA-TM-527
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 39
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Type: NACA-TM-506
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 40
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: Among the numerous thermodynamic and kinetic problems that have arisen in the application of the gaseous explosive reaction as a source of power in the internal combustion engine, the problem of the mode or way by which the transformation proceeds and the rate at which the heat energy is delivered to the working fluid became very early in the engine's development a problem of prime importance. The work of Becker here given is a notable extension of earlier investigations, because it covers the entire range of the explosive reaction in gases - normal detonation and burning.
    Type: NACA-TM-505
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 41
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Type: NACA-AC-102
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 42
    Publication Date: 2019-06-28
    Description: An investigation was conducted to determine the effect of the wings on propulsive efficiency. The wings are shown to cause a reduction of 1 percent to 3 percent in propulsive efficiency, which is about the same for monoplane as well as biplane wings.
    Type: NACA-TN-322
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 43
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: In order to make a stress analysis of seaplane floats, and especially of the members connecting the floats with the fuselage, it is of great importance to determine the maximum pressure acting on the floats during landing. Here, the author gives a formula for maximum pressures during landing that permits one to apply experimental results to different bodies and different velocities. The author notes that the formula checks very well with experimental results.
    Type: NACA-TN-321
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 44
    Publication Date: 2019-06-28
    Description: A wing interference investigation was conducted to determine why the N.A.C.A. cowling did not yield the expected increase in speed when adapted to the outboard nacelles of trimotored airplanes.
    Type: NACA-TN-320
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 45
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: These experiments show that the rate of auto rotation of a monoplane airfoil is reduced by sweepback, ceasing entirely when the sweepback is 30 degrees. In addition a very serious increase in rate and range of auto rotation with yaw is shown.
    Type: NACA-TN-319
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 46
    Publication Date: 2019-06-28
    Description: Tests were made on the 1927 Williams racer in order to determine the effect of the wing radiator on the airfoil characteristics. It was found that the radiator doubled the minimum drag of the portion of the wing it covered, and also reduced the lift somewhat.
    Type: NACA-TN-318
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 47
    Publication Date: 2019-06-28
    Description: Tests were made on four racing type airfoils in order to determine the high speed characteristics of the wings.
    Type: NACA-TN-317
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 48
    Publication Date: 2019-06-28
    Description: This report describes preliminary wind tunnel tests on a model of a monoplane wing equipped with wing tip floating ailerons. Lift and drag, as well as rolling and yawing moments, were measured.
    Type: NACA-TN-316
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 49
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: In the development of Diesel engine fuel injection systems it is necessary to have an approximate knowledge of the absolute viscosity of the fuel oil under high hydrostatic pressures. This report presents the results of experimental tests conducted by Mr. Jackson Newton Shore, utilizing the A.S.M.E. high pressure equipment.
    Type: NACA-TN-315
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 50
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: The flight path followed by an airplane which was being flown by a blindfolded pilot was observed and recorded. When the pilot attempted to make a straight-away flight there was a tendency to deviate from the straight path and to take up a spiral one.
    Type: NACA-TN-314
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 51
    Publication Date: 2019-06-28
    Description: This report describes the atmospheric conditions under which ice is formed upon the exposed parts of airplanes in flight. It identifies the formation found under different conditions, and describes some studies of preventative means.
    Type: NACA-TN-313
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 52
    Publication Date: 2019-06-28
    Description: The air forces on a twenty-centimeter sphere were measured after it had been rebuilt as an open throat type. The results from tests made at widely different densities and airspeeds and also on a smaller sphere are given.
    Type: NACA-TN-312
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 53
    Publication Date: 2019-06-28
    Description: This preliminary report furnishes information on the changes in the forces on each wing of a biplane cellule for various combinations of stagger and gap, stagger and sweepback, stagger and decalage, and gap and decalage. The data were obtained from pressure distribution tests made in the atmospheric wind tunnel of the Langley Memorial Aeronautical Laboratory. Since each test was carried up to 90deg angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TN-330
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 54
    Publication Date: 2019-06-28
    Description: The results of tests to determine the effect of wheel brakes on the landing run of an airplane under conditions of load and at various wind velocities are presented.
    Type: NACA-TN-311
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 55
    Publication Date: 2019-06-28
    Description: Tests were made to determine the effects of air flow on the characteristics of fuel sprays from fuel injection valves. Curves and photographs are presented showing the airflow throughout the chamber and the effects of the air flow on the fuel spray characteristics. It was found that the moving air had little effect on the spray penetration except with the 0.006 inch orifice. The moving air did, however, affect the oil particles on the outside of the spray cone. After spray cut-off, the air flow rapidly distributed the atomized fuel throughout the spray chamber.
    Type: NACA-TN-329
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 56
    Publication Date: 2019-06-28
    Description: This report is on the changes in forces on each wing of a biplane cellule when either the stagger or the gap is varied. Since each test was carried up to a 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning as well as in the structural design of biplane wings.
    Type: NACA-TN-310
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 57
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Type: NACA-TN-309
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 58
    Publication Date: 2019-06-28
    Description: Given here are the results of tests made to determine the effect of fuel consumption on the cylinder temperatures and the performance of a cowled Wright J-5 engine. The results of these tests indicate that enriching the mixture by increasing the carburetor size results in a reduction in cylinder head and barrel temperatures. The cylinders shielded by the magnetos or the points on the cylinder that do not receive a free flow of cooling air increase most rapidly in temperature as the mixture is leaned. A free flow of air past the cylinders is essential for satisfactory operation on a lean mixture. The results of these tests show that the Wright J-5 engine can withstand severe temperatures for short periods of operation. The test results also show to what extent destructive temperatures may be avoided by enriching the mixture.
    Type: NACA-TN-328
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 59
    Publication Date: 2019-06-28
    Description: The general result indicated by this study is that if desirable from any viewpoint the gap between wing and fuselage may be closed without detrimental aerodynamic effects, and with a given monoplane there is less drag if the wing is directly on top of the fuselage than if it is parasol.
    Type: NACA-TN-327
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 60
    Publication Date: 2019-06-28
    Description: Measurements were made in the variable density wind tunnel to determine the pressure distribution over one section of a R.A.F. 31 airfoil with a leading edge slot fully open. To provide data for the study of scale effect on this type of airfoil, the tests were conducted with air densities of approximately one and twenty atmospheres.
    Type: NACA-TN-308
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 61
    Publication Date: 2019-06-28
    Description: This report deals with pressure distribution tests on an airfoil with a conventional trailing edge flap. These tests were conducted in the Atmospheric Wind Tunnel of the National Advisory Committee for Aeronautics. Maximum chord loadings were obtained with the flap displaced downward and with the airfoil at large angles of attack. Greater changes were produced in the normal force and in the center of pressure travel by up-flap than by an equal down-flap displacement.
    Type: NACA-TN-326
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 62
    Publication Date: 2019-06-28
    Type: NACA-TN-307
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 63
    Publication Date: 2019-06-28
    Description: This preliminary report furnishes information on the changes in the forces on each wing of a biplane cellule when the decalage, dihedral, sweepback and overhang are separately varied. The data were obtained from pressure distribution tests made in the Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. Since each test was carried up to 90 degree angle of attack, the results may be used in the study of stalled flight and of spinning and in the structural design of biplane wings.
    Type: NACA-TN-325
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 64
    Publication Date: 2019-06-28
    Description: Given here are a set of column strength curves that are intended to simplify the method of determining the size of struts in an airplane structure when the load in the member is known. The curves will also simplify the checking of the strength of a strut if the size and length are known. With these curves, no computations are necessary, as in the case of the old-fashioned method of strut design. The process is so simple that draftsmen or others who are not entirely familiar with mechanics can check the strength of a strut without much danger of error.
    Type: NACA-TN-306
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 65
    Publication Date: 2019-06-28
    Description: The effect of corrosion on the tensile properties of duralumin while stressed is shown in graphical form. According to the test results, duralumin sheet, coated with aluminum, maintains its initial properties unimpaired for corrosion periods as long as 60 days with an applied tensile stress as high as 20,000 lb/sq.in., which is approximately one-half the stress corresponding to the yield point as defined here. In these tests, that material which had been heat-treated by being quenched in cold water, though far inferior to similar material having the aluminum coating, was superior to the sheet material which was heat treated by being quenched in hot water. These results are in excellent agreement with the results of previous laboratory and exposure tests.
    Type: NACA-TN-305
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 66
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: This compilation of the outstanding characteristics of the available aircraft engines of the world was prepared as a compact ready reference for desk use. It does not pretend to be anything but a skeleton outline of the characteristics of engines reported in the technical press as being in either the experimental, development, or production stage.
    Type: NACA-TN-303
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 67
    Publication Date: 2019-06-28
    Description: In a series of weather exposure tests of sheet duralumin, upon which accelerated corrosion tests in the laboratory by the wet-and-dry corrosion method in a sodium chloride solution has already been carried out, a close parallelism between the results of the two kinds of tests was found to exist. The exposure tests showed that the lack of permanence of sheet duralumin is largely, if not entirely, due to corrosion. A corrosion attack of an intercrystalline nature is very largely responsible for the degree of embrittlement produced. The rate of embrittlement was greatly accelerated by a marine atmosphere and by the tropical climate. Variations in corrosion and embrittlement are noted in relation to heat treatment, cold working, and types of protective coatings.
    Type: NACA-TN-304
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 68
    Publication Date: 2019-06-28
    Description: A new method for the prediction of airplane performance in level and climbing flight, together with complete information regarding propeller speeds, is described in this report. Developed from Bairstow's system and making use of American absolute coefficients, this method has advantages of simplicity and brevity.
    Type: NACA-TN-302
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 69
    Publication Date: 2019-06-28
    Description: The investigation described in this report is concerned with the changes in the aerodynamic characteristics of an airfoil which are produced by a gauze-covered suction slot, located near the leading edge, and connected by an air passage to a split flap at the trailing edge. The tests were conducted at the Langley Memorial Aeronautical Laboratory. At the larger values of lift coefficient where the action of the slot might be expected to be most effective, the pressure differences were such that the air flowed out of the slot rather than in through it, and in consequence, the maximum lift coefficient was decreased.
    Type: NACA-TN-324
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 70
    Publication Date: 2019-06-28
    Description: This report presents the results of an investigation to determine the effect of boundary layer control on the lift and drag of an airfoil equipped with a backward opening slot. Various slot locations, widths of opening, and pressures, were used. The tests were conducted in the Five-Foot Atmospheric Wind Tunnel of the Langley Memorial Aeronautical Laboratory. The greatest increase in maximum lift was 96 per cent, the greatest decrease in minimum drag was 27 per cent, and the greatest increase in the ratio, maximum lift coefficient/minimum drag coefficient, was 151 per cent.
    Type: NACA-TN-323
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 71
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Type: NACA-AC-94
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 72
    Publication Date: 2019-06-28
    Description: An adjustable blade metal propeller was tested at five different angle settings, forming a series varying in pitch. The propeller was mounted on a VE-7 airplane in the twenty-foot propeller research tunnel of the National Advisory Committee for Aeronautics. The efficiencies were found to be from 4 to 7 per cent higher than those of standard wood propellers operating under the same conditions. The results are given in convenient form for use in selecting propellers for aircraft.
    Type: NACA-TR-306
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 73
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: This report on a method of analysis of aircraft accidents has been prepared by a special committee on the nomenclature, subdivision, and classification of aircraft accidents organized by the National Advisory Committee for Aeronautics in response to a request dated February 18, 1928, from the Air Coordination Committee consisting of the Assistant Secretaries for Aeronautics in the Departments of War, Navy, and Commerce. The work was undertaken in recognition of the difficulty of drawing correct conclusions from efforts to analyze and compare reports of aircraft accidents prepared by different organizations using different classifications and definitions. The air coordination committee's request was made "in order that practices used may henceforth conform to a standard and be universally comparable." the purpose of the special committee therefore was to prepare a basis for the classification and comparison of aircraft accidents, both civil and military. (author)
    Type: NACA-TR-308
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 74
    Publication Date: 2019-06-28
    Description: This report deals with the results of a series of studies of the kinetics of gaseous explosive reactions where the fuel under observation, instead of being a simple gas, is a known mixture of simple gases. In the practical application of the gaseous explosive reaction as a source of power in the gas engine, the fuels employed are composite, with characteristics that are apt to be due to the characteristics of their components and hence may be somewhat complex. The simplest problem that could be proposed in an investigation either of the thermodynamics or kinetics of the gaseous explosive reaction of a composite fuel would seem to be a separate study of the reaction characteristics of each component of the fuel and then a study of the reaction characteristics of the various known mixtures of those components forming composite fuels more and more complex. (author)
    Type: NACA-TR-305
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 75
    Publication Date: 2019-06-28
    Description: The investigation described in this report was made primarily to afford a comparison between propeller tests in the new propeller research tunnel and flight tests and small model tests on propellers. Three wood propellers which had been previously tested in flight on a VE-7 airplane, and of which models had also been tested in a wind tunnel, were tested again on a VE-7 airplane in the propeller research tunnel. The results of these tests are in fair agreement with those of the flight and model tests. Tests were also made with the tail surfaces removed, and with both the wing and tail surfaces removed. It was found that the effect of the tail surfaces on the propeller characteristics was negligible, but that the wings reduced the maximum propulsive efficiency about 5 percent. (author)
    Type: NACA-TR-301
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 76
    Publication Date: 2019-06-28
    Description: This report covers the results of an investigation carried on at the Bureau of Standards under a research authorization from, and with the financial assistance of, the National Advisory Committee for Aeronautics. The choice of a damping liquid for aircraft instruments is difficult owing to the range of temperature at which aircraft operate. Temperature changes affect the viscosity tremendously. The investigation was undertaken with the object of finding liquids of various viscosities otherwise suitable which had a minimum change in viscosity with temperature. The new data relate largely to solutions. The effect of temperature on the kinematic viscosity of the following liquids and solutions was determined in the temperature interval -18 degrees to +30 degrees C. (1) solutions of animal and vegetable oils in xylene. These were poppy-seed oil, two samples of neat's-foot oils, castor oil, and linseed oil. (2) solutions of mineral oil in xylene. These were Squibb's petrolatum of naphthene base and transformer oil. (3) glycerine solutions in ethyl alcohol and in mixture of 50-50 ethyl alcohol and water. (4) mixtures of normal butyl alcohol with methyl alcohol. (5) individual liquids, kerosene, mineral spirits, xylene, recoil oil. The apparatus consisted of four capillary-tube viscometers, which were immersed in a liquid bath in order to secure temperature control. The method of calibration and the related experimental data are presented.
    Type: NACA-TR-299
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 77
    Publication Date: 2019-06-28
    Description: This report presents the results of an investigation of the rolling and yawing moments due to ailerons of various chords and spans on two airfoils having the Clark Y and U. S. A. 27 wing sections. Some attention is devoted to a study of the effect of scale on rolling and yawing moments and to the effect of slightly rounding the wing tips. The results apply to level flight with the wing chord set at an angle of attack of +4 degrees and to conditions of zero pitch, zero yaw, and zero roll of the airplane. It is planned later to extend the investigation to other attitudes for monoplane and biplane combinations. The work was conducted in the 10 foot wind tunnel of the Bureau of Standards on models of 60-inch span and 10-inch chord. (author)
    Type: NACA-TR-298
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 78
    Publication Date: 2019-06-28
    Description: This report shows how the actual performance of an airplane varies with air temperature when the pressure is held constant. This leads to comparatively simple methods of reducing observed data to standard conditions. The new methods which may be considered exact for all practical purposes, have been used by the Navy Department for about a year, with very satisfactory results. The report also contains a brief historical review of the important papers which have been published on the subject of performance reduction, and traces the development of the standard atmosphere. (author)
    Type: NACA-TR-297
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 79
    Publication Date: 2019-06-28
    Description: This report is concerned with the problem of calculation of the horizontal tail area necessary to give a statically stable airplane. Two entirely different methods are developed, and reduced to simple formulas easily applied to any design combination. Detailed instructions are given for use of the formulas, and all calculations are illustrated by examples. The relative importance of the factors influencing stability is also shown. (author)
    Type: NACA-TR-293
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 80
    Publication Date: 2019-06-28
    Description: This report presents the results of wind-tunnel tests on eight C-class airship hulls with various fineness ratios, conducted in the Navy Aerodynamic Laboratory, Washington. The purpose of the tests was to determine the variation of resistance with fineness ratio, and also to find the pressure and friction elements of the total drag for the model having the least shape coefficient. Seven C-class airship hulls with fineness ratios of 1.0, 1.5, 2.0, 3.0, 6.0, 8.0, and 10.0 were made and verified. These models and also the previously constructed original C-class hull, whose fineness ratio is 4.62, were then tested in the 8 by 8 foot tunnel for drag of 0 degree pitch and yaw, at various wind speeds. The original hull, which was found to have the least shape coefficient, was then tested for pressure distribution over the surface at various wind speeds. (author)
    Type: NACA-TR-291
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 81
    Publication Date: 2019-06-28
    Description: The pressure distribution tests described in this report, covering angles of attack up to 90 degrees, were made on a rectangular monoplane wing model in the atmospheric wind tunnel of the Langley Memorial Aeronautical Laboratory. These tests indicate that a rectangular wing, by reason of its large tip loads, is uneconomical aerodynamically and structurally, has pronounced lateral instability above maximum lift, and is not adaptable to accurate calculation based on the classical wing theory. (author)
    Type: NACA-TR-288
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 82
    Publication Date: 2019-06-28
    Description: Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
    Type: NACA-AR-14
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 83
    Publication Date: 2019-06-28
    Description: This report presents the results of preliminary tests made on the effects of supercharging an air-cooled engine under airplane flight conditions. Service training airplanes were used in the investigation equipped with production types of Wright J engines. A N.A.C.A. Roots type supercharger was driven from the rear of the engine. In addition to measuring those quantities that would enable the determination of the climb performance, measurements were made of the cylinder-head temperatures and the carburetor pressures and temperatures. The supercharging equipment was not removed from the airplane when making flights without supercharging, but a by-pass valve, which controlled the amount of supercharging by returning to the atmosphere the surplus air delivered by the supercharger, was left full open. With the supercharger so geared that ground-level pressure could be maintained to 18,500 feet, it was found that the absolute ceiling was increased from 19,400 to 32,600 feet, that the time to climb to 16,00 feet was decreased from 32 to 16 minutes, and that this amount of supercharging apparently did not injure the engine. (author)
    Type: NACA-TR-283
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 84
    Publication Date: 2019-06-28
    Description: This report presents the results of tests made on three sizes of roots type aircraft engine superchargers. The impeller contours and diameters of these machines were the same, but the length were 11, 8 1/4, and 4 inches, giving displacements of 0.509, 0.382, and 0.185 cubic foot per impeller revolution. The information obtained serves as a basis for the examination of the individual effects of impeller speed and displacement on performance and of the comparative performance when speed and displacement are altered simultaneously to meet definite service requirements. According to simple theory, when assuming no losses, the air weight handled and the power required for a given pressure difference are directly proportional to the speed and the displacement. These simple relations are altered considerably by the losses. When comparing the performance of different sizes of machines whose impeller speeds are so related that the same service requirements are met, it is found that the individual effects of speed and displacement are canceled to a large extent, and the only considerable difference is the difference in the power losses which decrease with increase in the displacement and the accompanying decrease in speed. This difference is small in relation to the net power of the engine supercharger unit, so that a supercharger with short impellers may be used in those applications where the space available is very limited with any considerable sacrifice in performance.
    Type: NACA-TR-284
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 85
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: I will attempt to determine mathematically the buckling-strength curves of various centrally loaded light-metal tubes which exhibit conspicuous differences of behavior under compressive loads. For this purpose I will employ Von Karman's method, after adapting it to special conditions.
    Type: NACA-TM-525
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 86
    Publication Date: 2019-06-28
    Description: The following examples do not take up the discussion of viewpoints to be heeded in determining the design of a framework for given external conditions. Rather they are methods for determining the forces in airplane fuselages and wings, though similar considerations are applied to certain simple cases of a different kind. The object of this treatise is to summarize and amplify these considerations from definite viewpoints.
    Type: NACA-TM-522
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 87
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: The most essential phenomena of aircraft should be classified according to their origin and then measured. Information can thus be obtained in a quicker, cheaper, and more reliable way than otherwise would be possible.
    Type: NACA-TM-519
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 88
    Publication Date: 2019-06-28
    Description: The present paper treats less of the effect of the union (of spars and ribs, namely, the reduction of the bending moment at the fixed ends of the spars) than of its influence on the torsional rigidity of the wing. The calculations are carried out for a two-spar wing of constant cross section, in which the ribs are replaced by a continuous member of constant rigidity.
    Type: NACA-TM-520
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 89
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: This report presents the results of tests on two-stroke-cycle Diesel engines to determine the efficiency of the crank case scavenging pump. It was determined that efficiencies were between 95 and 100%.
    Type: NACA-TM-516
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 90
    Publication Date: 2019-06-28
    Description: Different methods of constructing light airplanes are presented with a view toward increasing production and efficiency.
    Type: NACA-TM-515
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 91
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: The present investigation relates to a box-type fuselage with sides consisting of thin smooth sheet metal, stiffened by longitudinal members riveted to the flanged channel-section bulkheads or transverse frames and to the semicircular corrugated corner stiffenings. The results obtained in this particular case can be applied to a great number of similar structures.
    Type: NACA-TM-511
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 92
    Publication Date: 2019-06-28
    Description: This investigation of the pressure distribution on the tail surfaces of a pursuit airplane in violent maneuvers was conducted for the purpose of determining the maximum loads likely to be encountered on these surfaces in flight. The information is a part of that needed for a revision of existing loading specifications to bring these into closer agreement with the actual flight conditions. A standard F6C-4 airplane was used and the pressure distribution over the right horizontal and complete vertical tail surfaces was recorded throughout violent maneuvers. The results show that the existing loading specifications do not conform satisfactorily to the loadings existent in critical conditions, and in some cases were exceeded by the loads obtained. An acceleration of 10.5 G. Was recorded in one maneuver in which the pilot suffered severely; it is therefore indicated that the limits of the physical resistance of the pilot to violent maneuvers are being approached. Navy specifications for the structural design of tail surfaces are included as an appendix. (author)
    Type: NACA-TR-307
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 93
    Publication Date: 2019-06-28
    Description: This report describes an investigation made in order to determine the effect of tip speed on the characteristics of a thin-bladed metal propeller. The propeller was mounted on a VE-7 airplane with a 180-HP E-2 engine, and tested in the 20-foot propeller research tunnel of the National Advisory Committee for Aeronautics. It was found that the effect of tip speed on the propulsive efficiency was negligible within the range of the tests, which was from 600 to 1,000 feet per second (about 0.5 to 0.9 the velocity of sound in air). (author)
    Type: NACA-TR-302
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 94
    Publication Date: 2019-06-28
    Description: This report presents the results of an analytical investigation on the practicability of using mechanically operated discharge valves in conjunction with a manually operated intake control for improving the performance of N. A. C. A. Roots type superchargers. These valves, which may be either of the oscillating or rotating type, are placed in the discharge opening of the supercharger and are so shaped and synchronized with the supercharger impellers that they do not open until the air has been compressed to the delivery pressure. The intake control limits the quantity of air compressed to engine requirements by permitting the excess air to escape from the compression chamber before compression begins. The percentage power saving and the actual horsepower saved were computed for altitudes from 0 to 20,000 feet. These computations are based on the pressure-volume cards for the conventional and the modified roots type superchargers and on the results of laboratory tests of the conventional type. The use of discharge valves shows a power saving of approximately 26 per cent at a critical altitude of 20,000 feet. In addition, these valves reduce the amplitude of the discharge pulsations and increase the volumetric efficiency. With slow-speed roots blowers operating at high-pressure differences even better results would be expected. For aircraft engine superchargers operating at high speeds these discharge valves increase the performance as above, but have the disadvantages of increasing the weight and of adding a high-speed mechanism to a simple machine. (author)
    Type: NACA-TR-303
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 95
    Publication Date: 2019-06-28
    Description: This report presents the results of wind tunnel tests on four elliptic cylinders with various fineness ratios, conducted in the Navy Aerodynamic Laboratory, Washington. The object of the tests was to investigate the characteristics of sections suitable for streamline wire which normally has an elliptic section with a fineness ratio of 4.0; also to learn whether a reduction in fineness ratio would result in improvement; also to determine the pressure distribution on the model of fineness ratio of 4. Four elliptic cylinders with fineness ratios of 2.5, 3.0, 3.5, and 4.0 were made and then tested in the 8 by 8 wind tunnel; first, for cross-wind force, drag, and yawing moment at 30 miles an hour and various angles of yaw; next for drag 0 degree pitch and 0 degree yaw and various wind speeds; then for end effect on the smallest and largest models; and lastly for pressure distribution over the surface of the largest model at 0 degree pitch and 0 degree yaw and various wind speeds. In all tests, the length of the model was transverse to the current. The results are given for standard air density, p = .002378 slug per cubic foot. This account is a slight revised form of report no. 315. A summary of conclusions is given at the end of the text. (author)
    Type: NACA-TR-289
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 96
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: The laws of comparison of dynamically similar fluid motions are derived by three different methods based on the same principle and yielding the same or equivalent formulas. This report outlines the three current methods of comparing dynamically similar motions, more especially of fluids, initiated respectively by Newton, Stokes (or Helmholtz), and Rayleigh. These three methods, viz., the integral, the differential, and the dimensional, are enough alike to be studied profitably together. They are treated in succession then compared. (author)
    Type: NACA-TR-287
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 97
    Publication Date: 2019-06-28
    Description: Many treatises in regard to construction of airship sheds are lacking in data on air currents, for which reason this phase of the problem will be here thoroughly discussed in connection with the accompanying photographs of currents.
    Type: NACA-TM-512
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 98
    facet.materialart.
    Unknown
    In:  CASI
    Publication Date: 2019-06-28
    Description: This report presents a thermodynamic basis for rating heat engines. The production of work by a heat engine rests on the operation of supplying heat, under favorable conditions, to a working fluid and then taking it away.
    Type: NACA-TM-509
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 99
    Publication Date: 2019-06-28
    Description: A nomogram is developed which renders it possible by drawing a few lines, to determine: the location of the center of gravity for zero wing and tail moments; the longitudinal dihedral angle; the tail coefficient F(sub h) iota/F(sub t). Moreover there is no difficulty in determining the magnitude of the restoring moment or of the unstable moment.
    Type: NACA-TM-545
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 100
    Publication Date: 2019-06-28
    Description: This investigation was conducted by the National Advisory Committee for Aeronautics at Langley Field, Va., at the request of the Army Air Corps, for the purpose of comparing the full scale lift and drag characteristics of an airplane equipped with several sets of wings of commonly used airfoil sections. A Sperry Messenger Airplane with wings of R.A.F.-15, U.S.A.-5, U.S.A.-27, and Gottingen 387 airfoil sections was flown and the lift and drag characteristics of the airplane with each set of wings were determined by means of glide tests. The results are presented in tabular and curve form. (author)
    Type: NACA-TR-304
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...