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  • 1940-1944  (20,268)
  • 1943  (20,268)
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Keywords
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Year
  • 1
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    List of Orchidaceae collected in 1937 by Dr C. G. G. J. van Steenis in Atjeh (North Sumatra) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 316-323
    Details
    Publication Date: 2024-01-12
    Description: Platanthera angustata (Bl.) Lndl., Gen. et sp. Orch. (1835), 290; etc.\nSumatra: Atjeh, Gajolanden, Poetjoek Angasan, bivouac 1 to 2, 2700 m, blang ground, marshy heath, common (C. G. G. J. van Steenis n. 8350, 28 Jan. 1937). G. Leuser, bivouac 4\xe2\x80\x945, watershed, 2700\xe2\x80\x942800 m (C. G. G. J. van Steenis n. 8502, 31 Jan. 1937). Same locality, central top, Aloer near bivouac 6, 3250\xe2\x80\x943300 m, mountain meadow (C. G. G. J. van Steenis n. 8683, 3 Febr. 1937). G. Goh Lemboeh, from bivouac Aer Poetih waterfall to bivouac Halfweg, 1000 m (C. G. G. J. van Steenis n. 8902, 8 Febr. 1937).
    Repository Name: National Museum of Natural History, Netherlands
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  • 2
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    The influence of Artemisia Absinthium on neighbouring plants. (An essay of Experimental Plant Sociology No. III) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 281-293
    Details
    Publication Date: 2024-01-12
    Description: Eighteen species of plants, most of which were chosen at random, were sown beside a hedge of Artemisia Absinthium; they were severely injured and in one ease ( Levisticum officinale) even killed by the chemical excretions of the latter within a distance of \xc2\xb1 100 cm; seedlings of Artemisia Absinthium, on the contrary, were not harmed by the plants in the hedge. The experiments were made during two successive summers and in different surroundings; the results were consistent and confirmed those of Bode, notwithstanding the fact that climatic conditions were extremely unfavourable for the excretion of absinthiin and that even during fine weather it appeared to be feeble owing to the sea climate of Leiden. Spells of cold and of heavy rains sometimes kept the excretion so low that temporarily the absinth plants seemed to exert no action at all.\nSeedlings which had survived the proximity of the absinth in their first year developed normally during the next season. It was demonstrated that the proximity of Atriplex hortensis had no influence on the same test plants which were injured by Artemisia Absinthium and that they were only physically oppressed by Artemisia vulgaris, viz. by its spreading, branches. This makes it probable that it is indeed the absinthiin, excreted by Artemisia Absinthium, which causes this species to be harmful to the surrounding plants.\nFresh leaves of Artemisia Absinthium, dug in the soil, reduced the percentage of germination and sometimes also hindered the development of the seedlings of a number of species. Foliage of Artemisia vulgaris had sometimes a similar action, but seldom to the same degree. In the case of A. Absinthium two harmful effects are apparently combined: a too great amount of organic manure and the formation of absinthiin.\nIt will be worth while to examine the ecological importance of Artemisia Absinthium in its natural habitat.
    Repository Name: National Museum of Natural History, Netherlands
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  • 3
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    On a new species of Paspalum from the island of Bonaire (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 324-327
    Details
    Publication Date: 2024-01-12
    Description: Among the plants collected in the West-Indies by I. Boldingh during the years 1909 and 1910 there was a grass determined as Paspalum hemisphericum Poir., a name changed into glabrum. These determinations are incorrect because Paspalum hemisphericum Poiret is the same as the wellknown Paspalum paniculatum L. and also quite different from Poiret\xe2\x80\x99s Paspalum glabrum, which, according to Mrs. A. Chase\xe2\x80\x99s investigations, is the Paspalum laxum of Lamarck.\nAmong Bolding\xe2\x80\x99s plants there is a good specimen from the island of Bonaire, which, studied with Chase\xe2\x80\x99s work on the North-American species of Paspalum, could not be identified. In Chase\xe2\x80\x99s work also the species of Central-America and the West-Indian Islands are taken up, moreover the latter are also treated in Hitchcock\xe2\x80\x99s posthumous work on the grasses of that region.
    Repository Name: National Museum of Natural History, Netherlands
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  • 4
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    Some Chlorophyceae from the marine salines of Bonaire (Netherlands West Indies) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 328-335
    Details
    Publication Date: 2024-01-12
    Description: A collection of samples containing algae from the salines of Bonaire was brought home by Mr P. Wagenaar Hummelinck from his trips to the Netherlands West Indian Islands in 1930 and in 1936\xe2\x80\x941937. Though these trips were chiefly undertaken in order to gather zoological material (1, 2) 1), the collector paid attention to botanical objects as well, results of which are to be found in eight earlier papers (3\xe2\x80\x9410).\nSeveral data concerning Bonaire can be learned from Mr Wagenaar Hummelinck\xe2\x80\x99s publications. The island, having an area of about 265 km2, is chiefly composed of quaternary limestone (coralrocks), which forms a large plateau in the North East and the South. The Northwestern part of the island is much higher and more indented. Klein Bonaire, having an area of only 7 km2 and situated \xc2\xbe km West of Bonaire, consists of a low limestone plateau only.
    Repository Name: National Museum of Natural History, Netherlands
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  • 5
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    Orchidaceae novae malayenses XVII (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 297-315
    Details
    Publication Date: 2024-01-12
    Description: Planta florens 62\xe2\x80\x9472 cm alta. Caulis inferne vaginatus, ceterum foliatus. Folia c. 8, lineari-lanceolata ad linearia, breviter acuminata ad sensim acutata, acuta, sicco membranacea, 12.5\xe2\x80\x9414 cm longa, 1.8\xe2\x80\x941.1 cm lata, superiora decrescentia et sensim in bracteas vergentia; vaginae inferiores longe tubulosae, superiores 0. Inflorescentia sublaxe vel subdense multiflora, glabra, rachide 12\xe2\x80\x9418 cm longa. Bracteae majusculae, oblongo-ovatae, sensim longe acuminatae, acutae, concavae, c. 2.4 cm longae, 0.8 cm latae. Flores erecto-patentes, inferiores c. 2.3 cm longi. Sepalum dorsale cum petalis galeiforme, ellipticum, vix ovatum, apice leviter contractum, obtusum, basi vix contractum, coneavum, 3-nervium, costa media dorso prominula, c. 0.8 cm longum, 0.4 cm latum. Sepala lateralia oblique elliptica, leviter sigmoidea, apice contracta obtusa et irregulariter marginata (minute crenulata), basi contracta, concava, 3-nervia, c. 0.85 cm longa, 0.35 cm lata. Petala oblique oblonga, margine interiore leviter sigmoidea, paulo inaequilatera praesertim versus basin, obtusa, 2-nervia, c. 0.75 cm longa, 0.25 cm lata. Labellum 3-partitum, calcaratum, usque ad apicem laciniae intermediae 1 cm longum, lamina reflexa, ungue gynostemio adpresso costulis 3 longitudinalibus convexis instructo bene 0.1 cm longo, laciniis lateralibus patentibus cum lacinia intermedia angulum acutum facientibus bene 0.7 cm longis ex ungue late lineari 0.24 cm longo dilatatis et 3/5\xe2\x80\x94 2/3, partibus superioribus extus in lacinulas c. 7 inaequales patentes lineares 0.14\xe2\x80\x940.38 cm longas partitis, lacinia intermedia recta lineari anguste obtusa 0.65 cm longa, 0.075 cm lata; calcar dependens, rectum, clavatum, dimidio superiore inflato, 1.65 cm longum. Gynostemium usque ad apicem processuum stigmaticorum c. 0.53 cm metiens, connectivo hippocrepidiformi, thecis longe remotis subovalibus, canalibus thecas superantibus incurvis linearibus, auriculis parvis. Proeessus stigmatici porrecti, canales superantes, apice recurvi, oblongi, falcati, subacuti. Ovarium pedicellatum.\nBali: Goenoeng Agoeng, southern slope, 1500\xe2\x80\x942000 m, grass-fields, common (C. G. G. J. van Steenis n. 7790, type, in Herb. Buitenz. and Leiden, 6 April 1936; \xe2\x80\x9codour of hyacinths\xe2\x80\x9d).
    Repository Name: National Museum of Natural History, Netherlands
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  • 6
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    The relation between taxonomy and chemistry of plants (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 412-422
    Details
    Publication Date: 2024-01-12
    Description: The first question in this field of science is: can we say, that there is actually any relation between taxonomy and chemistry of plants? Nearly a century ago the worker in chemistry Rochleder (10) attempted to show the possibility of this relation and called that branch of science phytochemistry.\nTo begin with, something must be said about the products in question, Glucose, sucrose, several aminoacids and other acids are, of course, left out of account. Only those chemical products, which are more or less specific and characterise larger or smaller groups of plants are considered here.
    Repository Name: National Museum of Natural History, Netherlands
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  • 7
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    The Convolvulaceae of Malaysia, IV. (with Indices) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 339-411
    Details
    Publication Date: 2024-01-12
    Description: The genera Mina and Lepistemon belong to the Ipomoeeae Hall, f., Stictocardia and Argyreia to the Argyreieae Hall. f.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
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    Investigations sur des tourbieres N\xc3\xa9erlandaises. N. La Tourbi\xc3\xa8re dans la partie m\xc3\xa9ridionale de la Vall\xc3\xa9e Gueldroise (1943)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht vol. 93 no. 1, pp. 542-558
    Details
    Publication Date: 2024-01-12
    Description: La tourbi\xc3\xa8re au Sud de Veenendaal, dans la Vall\xc3\xa9e Gueldroise, ayant environ la forme d\xe2\x80\x99une halt\xc3\xa8re, a son origine dans une nappe d\xe2\x80\x99eau eutrophe, d\xc3\xa9ja pr\xc3\xa9sente lors de la premi\xc3\xa8re phase du tardiglaciaire. Dans les commencements s\xe2\x80\x99y forma un s\xc3\xa9diment (sable humeux), qui se composait, outre de restes v\xc3\xa9g\xc3\xa9taux, de sable apport\xc3\xa9 par le vent. Il est impossible qu\xe2\x80\x99un bras du Rhin ait coul\xc3\xa9 l\xc3\xa0 en ces temps. La tourbe se compose de mati\xc3\xa8res successivement eutrophes et m\xc3\xa9sotrophes. Une grande partie du profil (depuis le d\xc3\xa9but de l\xe2\x80\x99Atlanticum), est compos\xc3\xa9e de tourbe de marais bois\xc3\xa9 (Broekveen). Dans les sondages les plus m\xc3\xa9ridionaux on trouve de l\xe2\x80\x99argile dans les couches sup\xc3\xa9rieures (provenant probablement d\xe2\x80\x99inondations venant du c\xc3\xb4t\xc3\xa9 du Rhin). A mesure qu\xe2\x80\x99on s\xe2\x80\x99approche du Sud, l\xe2\x80\x99argile occupe une place de plus en plus importante dans le profil. Il n\xe2\x80\x99est trace de mati\xc3\xa8res oligotrophes (tourbe de Sphagnum), ni m\xc3\xaame dans le sondage VK (Veenkampen), o\xc3\xb9 cependant la carte g\xc3\xa9ologique mentionne une couche d\xe2\x80\x99argile recouvrant la haute tourbi\xc3\xa8re. La tourbe oligotrophe a sans doute \xc3\xa9t\xc3\xa9 compl\xc3\xa8tement enlev\xc3\xa9e par une extraction commenc\xc3\xa9e d\xc3\xa8s le moyen-\xc3\xa2ge. Il apert que l\xe2\x80\x99histoire des for\xc3\xaats que l\xe2\x80\x99on peut constater dans la tourbe, depuis la premi\xc3\xa8re phase du tardiglaciaire jusqu\xe2\x80\x99\xc3\xa0 la fin de l\xe2\x80\x99Atlanticum (premi\xc3\xa8re apparition de Fagus), est conforme aux r\xc3\xa9sultats acquis pour des tourbi\xc3\xa8res environnantes de cette m\xc3\xaame \xc3\xa9poque, par d\xe2\x80\x99autres investigateurs. Seulement un maximum prononc\xc3\xa9 de Corylus manque dans notre tourbi\xc3\xa8re. Les couches sup\xc3\xa9rieures de la tourbi\xc3\xa8re ne pr\xc3\xa9sentent pas de spectres polliniques r\xc3\xa9cents, mais les spectres qu\xe2\x80\x99on y trouve ferment un ensemble harmonieux avec ceux des couches plus profondes. Nous avons constat\xc3\xa9 que la couche de mousse vivante, dans le Bennekommer Meent offre un spectre pollinique qui repr\xc3\xa9sente assez bien la v\xc3\xa9g\xc3\xa9tation foresti\xc3\xa8re actuelle. Nous avons d\xc3\xa9crit un sondage dans une petite tourbi\xc3\xa8re isol\xc3\xa9e a l\xe2\x80\x99Est du Emmikhuizerberg, qui offre enti\xc3\xa8rement un caract\xc3\xa8re tardiglaciaire. Au cas o\xc3\xb9 l\xe2\x80\x99examen de GL et de AH III et \xc3\xa9ventuellement d\xe2\x80\x99autres sondages (encore en projet), nous ouvriraient de nouveaux horizons, nous donnerons en temps et lieu des informations a ce sujet.\nNous avons accompli cette \xc3\xa9tude au Mus\xc3\xa9e et Herbier Botanique d\xe2\x80\x99Utrecht (Directeur M. le Professeur A. A. PULLE). Je tiens a remercier ici M. F. FLORSCH\xc3\x9cTZ pour ses pr\xc3\xa9cieux conseils et pour la mani\xc3\xa8re enthousiaste avec laquelle il a bien voulu guider ce travail. En m\xc3\xaame temps je veux exprimer ma gratitude affectueuse envers Mlle A. M. J. VAN BERESTEYN pour la traduction dont elle s\xe2\x80\x99est charg\xc3\xa9e.
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
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    A contribution to the knowledge of the Melastomataceae occurring in the Malay Archipelago especially in the Netherlands East\nIndies (1943)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht vol. 91 no. 1, pp. 1-391
    Details
    Publication Date: 2024-01-12
    Description: Originally it had been my intention to write a monograph of the Melastomataceae occurring in the Malay Archipelago. Owing to difficulties caused by the development of the political situation it was impossible for me, to carry out this plan to its full extent. As the important collections of the Herbarium of the Buitenzorg Botanical Garden could not be consulted and as most foreign herbaria too were inaccessible, I had to restrict myself almost entirely to the study of the collections preserved in the Utrecht and Leyden Herbaria. These however, though not so rich as those of the Buitenzorg herbarium, are very important, especially by the large number of type specimens. Of the great number of species described from parts of the Malay Archipelago outside the Dutch influence sphere, the types themselves could as a rule not be examined, and duplicates too were but rarely available. For this reason I was forced to restrict my endeavours almost entirely to the examination of the material collected in the parts known as the Netherlands East Indies. However, all genera known from the malayan region, for so far as they are in my opinion well-defined, have been incorporated in my keys.\nA detailed study of the Netherlands East Indian species was possible for me, as almost all important types are present in the Leyden and Utrecht Herbaria. The Melastomataceae especially those from Sumatra, Java and New Guinea are richly represented in these collections. Borneo, Celebes and the Lesser Sunda Islands probably would yield interesting results. The rich collections obtained from British North Borneo and Sarawak make it probable that the harvest obtained from the Netherlands part of Borneo will also contain many new and interesting forms, but of these collections but a small part has been distributed so far by the Buitenzorg herbarium.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
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    Onderzoek van Nederlandse Venen \xe2\x80\x94 M. Pollenanalyse en stratiegrafie van het veen in het hurener veld (1943)
    In:  Mededelingen van het Botanisch Museum en Herbarium van de Rijksuniversiteit te Utrecht vol. 92 no. 1, pp. 223-231
    Details
    Publication Date: 2024-01-12
    Description: Het Hurener Veld is gelegen in de provincie Overijssel, ten Noorden van de spoorlijn Almelo-Zwolle; tussen Wierden en Nijverdal (zie kaart, fig. 1). Het maakt deel uit van een klein veen van ongeveer 13,5 km\xc2\xb2, dat nu practisch geheel ontgonnen is. Dit veen ligt in een dal, dat in het Oosten en Westen begrensd wordt door heuvelruggen, die ontstaan zijn door stuwing van de Riss-gletschers.\nAan de Westkant zorgt de Regge voor de afwatering van dit dal. Deze afwatering moet echter zeer onvoldoende zijn geweest, waardoor in het dal veenvorming mogelijk was. Het ontstaan van het aangrenzende moerasveen (lagg) in het Noorden kan ook het gevolg zijn geweest van deze onvoldoende afwatering; ongelukkig genoeg is dit moerasveen geheel ontgonnen, zodat een onderzoek naar het verband met het veen van het Hurener Veld onmogelijk is.
    Repository Name: National Museum of Natural History, Netherlands
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  • 11
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    The influence of Satureja hortensis L. on Allium Cepa L. (An essay of Experimental Plant Sociology No. IV) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 294-296
    Details
    Publication Date: 2024-01-12
    Description: Contrary to what Pliny and Dodoens assert, Satureja hortensis appeared to be very deleterious to onions when these species were sown together.
    Repository Name: National Museum of Natural History, Netherlands
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  • 12
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    Note on Pouteria (Sapotaceae) (1943)
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 5 no. 2, pp. 336-338
    Details
    Publication Date: 2024-01-12
    Description: In recent years Baehni has provided us with some elaborate studies on the Sapotaceae (1, 2) and we understand that it is his intention to continue the series of generic monographs.\nAs I pointed out in a criticism (8) concerning the first of his papers, this seemed not a very successful beginning, be it only because one usually does not start a series of generic monographs by giving a survey of the whole family with the nature of a conclusion, without risking the judgment of prematurity. As might have been expected this paper contains a number of incorrectnesses, which may largely be ascribed to an insufficient knowledge of this intricate and difficult family.
    Repository Name: National Museum of Natural History, Netherlands
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  • 13
    Journal available for loan
    Journal available for loan
    FinanzArchiv : public finance analysis (1884-)
    Tübingen : Mohr Siebeck ; 1.1884 - 48.1931; N.F. 1.1932/33 - 10.1943/44(1945),3; 11.1948/49(1949) -
    Details
    Call number: ZS 22.95039
    Type of Medium: Journal available for loan
    Pages: Online-Ressource
    ISSN: 1614-0974 , 0015-2218 , 0015-2218
    URL: https://www.jstor.org/journal/finaarch
    URL: http://www.bibliothek.uni-regensburg.de/ezeit/?2143985
    URL: https://www.mohrsiebeck.com/zeitschrift/finanzarchiv-fa
    URL: https://www.jstor.org/journal/finaarch
    Language: German , English
    Note: N.F. entfällt ab 57.2000. - Volltext auch als Teil einer Datenbank verfügbar , Ersch. ab 2000 in engl. Sprache mit dt. Hauptsacht.
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    E-BOOK
  • 14
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    Jahresbericht des Direktors des Geodätischen Institutes für die Zeit vom April 1942 bis März 1943. (1943)
    Poeschel
    In:  Veröffentlichung des Geodätischen Institutes
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    Publication Date: 2020-02-12
    Language: German
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  • 15
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    Calculated and Measured Turning Performance of a Navy F2A-3 Airplane as Affected by the Use of Flaps (1943)
    In:  CASI
    Details
    Publication Date: 2019-11-26
    Description: No abstract available
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-ACR-3I30 , NACA-WR-W-6
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    NASA TECHNICAL REPORTS
  • 16
    Monograph available for loan
    Monograph available for loan
    Die luftmassenmäßige Arbeitsweise (1943)
    Leipzig : Keller
    Details Availability
    Call number: MOP 41722 / Mitte
    Type of Medium: Monograph available for loan
    Series Statement: Wissenschaftliche Abhandlungen Sonderband
    Location: MOP - must be ordered
    Branch Library: GFZ Library
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    BOOK
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  • 17
    Monograph available for loan
    Monograph available for loan
    Die Physik der Atomkerne (1943)
    Braunschweig : Vieweg
    Associated volumes
    Details Availability
    Call number: O 2012(100) / Regal 12 ; MOP 41370 / Mitte
    In: Die Wissenschaft
    Type of Medium: Monograph available for loan
    Pages: VI, 180 S. : Ill., graph. Darst.
    Series Statement: Die Wissenschaft 100
    Location: Magazine - must be ordered
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    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 18
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    A preliminary theoretical calculation of a propulsion system for the hydrobomb unit (1943)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: No abstract available
    Keywords: unknown
    Type: PR-2
    Format: text
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    NASA TECHNICAL REPORTS
  • 19
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    NACA Investigation of a Jet-Propulsion System Applicable to Flight (1943)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: Following a brief history of the NACA investigation of jet propulsion, a discussion is given of the general investigation and analysis leading to the construction of the jet-propulsion ground-test mock-up. The results of burning experiments and of test measurements designed to allow quantitative flight performance predictions of the system are presented and correlated with calculations. These calculations are then used to determine the performance of the system on the ground and in the air at various speeds and altitudes under various burning conditions. The application of the system to an experimental airplane is described and some performance predictions for this airplane are made.
    Keywords: Aircraft Propulsion and Power
    Type: NACA/TR-802
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    NASA TECHNICAL REPORTS
  • 20
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    Beiträge zur Kenntnis der meteorologischen Verhältnisse Nord-West-Spitzbergens (1943)
    In:  EPIC3Unpublished manuscript, Max-Robitzsch-Nachlass, Leipzig, 15 p.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Book , peerRev
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  • 21
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    Vom Klima der Antarktis, III. Die Stürme der Antarktis (1943)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 13(1), pp. 1-5, ISSN: 0032-2490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 22
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    Nordpolargebiet (1943)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 13(2), pp. 1-15, ISSN: 0032-2490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 23
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    Oceanographic Observations of the Scripps Institution in 1939 (1943)
    PANGAEA
    In:  EPIC3Records of observations, Scripps Institution of Oceanography, University of California Press, Berkley and Los Angeles, Bremerhaven, PANGAEA, 1(2), pp. 65-160
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 24
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    Die Fahrt des Hilfskreuzers Komet durch die Nordostpassage (1943)
    Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research
    In:  EPIC3Polarforschung, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research & German Society of Polar Research, 13(1), pp. 5-7, ISSN: 0032-2490
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: "Polarforschung" , peerRev
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  • 25
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    Experimental Investigation of Impact in Landing on Water (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The extent of agreement of the theoretical impact computations with the actual phenomenon has not as yet been fully clarified. There is on the one hand a certain imperfection in the theory (simplifying assumptions made) and on the other an insufficiency in the experimental data available. The object of our present paper is to show how far test results agree with the available approximate computation methods, to investigate in greater detail the physical nature of impact on water, and to perfect the experimental method of studying the phenomenon.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1046 , ; 438
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  • 26
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    Heat Transfer Through Turbulent Friction Layers (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The "general Prandtl number" Pr(exp 1) - A(sub q)/A Pr, aside from the Reynolds number determines the ratio of turbulent to molecular heat transfer, and the temperature distribution in turbulent friction layers. A(sub q) = exchange coefficient for heat; A = exchange coefficient for momentum transfer. A formula is derived from the equation defining the general Prandtl number which describes the temperature as a function of the velocity. For fully developed thermal boundary layers all questions relating to heat transfer to and from incompressible fluids can be treated in a simple manner if the ratio of the turbulent shear stress to the total stress T(sub t)/T in the layers near the wall is known, and if the A(sub q)/A can be regarded as independent of the distance from the wall. The velocity distribution across a flat smooth channel and deep into the laminar sublayer was measured for isothermal flow to establish the shear stress ratio T(sub t)/T and to extend the universal wall friction law. The values of T(sub t)/T which resulted from these measurements can be approximately represented by a linear function of the velocity in the laminar-turbulent transition zone. The effect of the temperature relationship of the material values on the flow near the wall is briefly analyzed. It was found that the velocity at the laminar boundary (in contrast to the thickness of the laminar layer) is approximately independent of the temperature distribution. The temperature gradient at the wall and the distribution of temperature and heat flow in the turbulent friction layers were calculated on the basis of the data under two equations. The derived formulas and the figures reveal the effects of the Prandtl number, the Reynolds number, the exchange quantities and the temperature relationship of the material values.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1047 , Zeitschrift fuer Angewandte Mathematik und Mechanik; 20; 6; 297-328
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  • 27
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    Heat Transfer and Hydraulic Flow Resistance for Streams of High Velocity (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Problems of hydraulic flow resistance and heat transfer for streams with velocities comparable with acoustic have present great importance for various fields of technical science. Especially, they have great importance for the field of heat transfer in designing and constructing boilers.of the "Velox" type. In this article a description of experiments and their results as regards definition of the laws of heat transfer in differential form for high velocity air streams inside smooth tubes are given.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1054 , Journal of Technical Physics; 9; 9; 808-818
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  • 28
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    Periodic Heat Transfer at Small Pressure Fluctuations (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The effect of cyclic gas pressure variations on the periodic heat transfer at a flat wall is theoretically analyzed and the differential equation describing the process and its solution for relatively. Small pressure fluctuations developed, thus explaining the periodic heat cycle between gas and wall surface. The processes for pure harmonic pressure and temperature oscillations, respectively, in the gas space are described by means of a constant heat transfer coefficient and the equally constant phase angle between the appearance of the maximum values of the pressure and heat flow most conveniently expressed mathematically in the form of a complex heat transfer coefficient. Any cyclic pressure oscillations, can be reduced by Fourier analysis to harmonic oscillations, which result in specific, mutual relationships of heat-transfer coefficients and phase angles for the different harmonics.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1048 , Forschung auf de Gebiete des Ingenieurwesens; 11; 2; 67-75
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  • 29
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    Piezoelectric Instruments of High Natural Frequency Vibration Characteristics and Protection Against Interference by Mass Forces (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The exploration of the processes accompanying engine combustion demands quick-responding pressure-recording instruments, among which the piezoelectric type has found widespread use because of its especially propitious properties as vibration-recording instruments for high frequencies. Lacking appropriate test methods, the potential errors of piezoelectric recorders in dynamic measurements could only be estimated up to now. In the present report a test method is described by means of which the resonance curves of the piezoelectric pickup can be determined; hence an instrumental appraisal of the vibration characteristics of piezoelectric recorders is obtainable.
    Keywords: Electronics and Electrical Engineering
    Type: NACA-TM-1040 , BDI-Forschungsheft 407; 12; 1-25; Rept-407
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  • 30
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    Pressure Distribution in Nonuniform Two-Dimensional Flow (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: In an attempt to follow the time rate of change of the processes in turbulent flows by quantitative measurements the measurement of the pressure is often beset with insuperable difficulties for the reason that the speeds and hence the pressures to be measured are often very small. On the other hand, the measurement of very small pressures requires, at least, considerable time, so that the follow-up of periodically varying processes is as goad as impossible. In order to obviate these difficulties a method, suggested by Prof. Prandtl, has been developed by which the pressure distribution is simply determined from the photographic flow picture. This method is described and proved on a worked-out example. It was found that quantitatively very satisfactory results can be achieved.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1039 , Ingenieur-Archives; 6; 1; 34-50
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  • 31
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    Piston Ring Pressure Distribution (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The discovery and introduction of the internal combustion engine has resulted in a very rapid development in machines utilizing the action of a piston. Design has been limited by the internal components of the engine, which has been subjected to ever increasing thermal and mechanical stresses, Of these internal engine components, the piston and piston rings are of particular importance and the momentary position of engine development is not seldom dependent upon the development of both of the components, The piston ring is a well-known component and has been used in its present shape in the steam engine of the last century, Corresponding to its importance, the piston ring has been a rich field for creative activity and it is noteworthy that in spite of this the ring has maintained its shape through the many years. From the many and complicated designs which have been suggested as a packing between piston and cylinder wall hardly one suggestion has remained which does not resemble the original design of cast iron rectangular ring.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1056 , ATZ Automobiltechnische Zeitschrift; 45; 3; 62-67
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  • 32
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    Heat Transfer Over the Circumference of a Heated Cylinder in Transverse Flow (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A method for recording the local heat-transfer coefficients on bodies in flow was developed. The cylinder surface was kept at constant temperature by the condensation of vapor except for a narrow strip which is heated separately to the same temperature by electricity. The heat-transfer coefficient at each point was determined from the electric heat output and the temperature increase. The distribution of the heat transfer along the circumference of cylinders was recorded over a range of Reynolds numbers of from 5000 to 426,000. The pressure distribution was measured at the same time. At Reynolds numbers up to around 100,000 high maximums of the heat transfer occurred in the forward stagnation point at and on the rear side at 180C, while at around 80 the heat-transfer coefficient on both sides of the cylinder behind the forward stagnation point manifested distinct minimums. Two other maximums occurred at around 115 C behind the forward stagnation point between 170,000 and 426,000. At 426,000 the heat transfer at the location of those maximums was almost twice as great as in the forward stagnation point, and the rear half of the cylinder diffused about 60 percent of the entire heat, The tests are compared with the results of other experimental and theoretical investigations.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1050 , Forschung auf dem Gebiete des Ingenieurwesens; 12; 2; 65-73
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  • 33
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    Researches on Preliminary Chemical Reactions in Spark-Ignition Engines (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Chemical reactions can demonstrably occur in a fuel-air mixture compressed in the working cylinder of an Otto-cycle (spark ignition) internal-combustion engine even before the charge is ignited by the flame proceeding from the sparking plug. These are the so-called "prelinminary reactions" ("pre-flame" combustion or oxidation), and an exact knowledge of their characteristic development is of great importance for a correct appreciation of the phenomena of engine-knock (detonation), and consequently for its avoidance. Such reactions can be studied either in a working engine cylinder or in a combustion bomb. The first method necessitates a complicated experimental technique, while the second has the disadvantage of enabling only a single reaction to be studied at one time. Consequently, a new series of experiments was inaugurated, conducted in a motored (externally-driven) experimental engine of mixture-compression type, without ignition, the resulting preliminary reactions being detectable and measurable thermometrically.
    Keywords: Propellants and Fuels
    Type: NACA-TM-1049 , Luftfahrtforschung; 19; 18; 249-266
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  • 34
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    The Heat Transfer to a Plate in Flow at High Speed (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The heat transfer in the laminar boundary layer of a heated plate in flow at high speed can be obtained by integration of the conventional differential equations of the boundary layer, so long as the material values can be regarded as constant. This premise is fairly well satisfied at speeds up to about twice the sonic speed and at not excessive temperature rise of the heated plate. The general solution of the equation includes Pohlhausen's specific cases of heat transfer to a plate at low speeds and of the plate thermometer. The solution shows that the heat transfer coefficient at high speed must be computed with the same equation as at low speed, when it is referred to the difference of the wall temperature of the heated plate in respect to its "natural temperature." Since this fact follows from the linear structure of the differential equation describing the temperature field, it is equally applicable to the heat transfer in the turbulent boundary layer.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1045 , Forschung; 11; 3; 116-124
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  • 35
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    Preliminary Correlation of the Effects of Beveled Trailing Edges on the Hinge-Moment Characteristics of Control Surfaces (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A study of available data from various tests of beveled control surfaces has been made in an attempt to develop a rational method for predicting the effects of beveled trailing edges on the hinge-moment characteristics of control surfaces in both two- and three-dimensional flow. The results of the study indicated that the change in the included angle at the control-surface trailing edge formed a convenient basis on which a correlation could be made of the effects of various profile modifications on hinge-moment characteristics. It is believed that the formulas developed will allow reasonably accurate predictions of the hinge-moment characteristics of sealed beveled control surfaces if the characteristics of the original control surfaces are known. The presence of a gap at the control-surface hinge increased the effect of beveled trailing edges on the hinge-moment characteristics at small control-surface deflections but the available data were insufficient to allow as complete a correlation as was possible for sealed controls.
    Keywords: Aerodynamics; Aircraft Design, Testing and Performance
    Type: NACA-CB-3E14
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  • 36
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    Wind-Tunnel Tests of an NACA 44R-Series Tapered Wing with a Straight Trailing Edge and a Constant-Chord Center Section (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: As part of a general investigation in the NACA 19-foot pressure tunnel to determine stall characteristics and effectiveness of high-lift devices on wings of various sections, tests were made of a tapered. wing having NACA 44R-series airfoil sections. Lift, drag, pitching-moment, and stall characteristics were determined at a Reynolds number of 4,850,000 for the plain wing and for the wing with partial-and with full-span split flaps. The stall progressed slowly over The plain wing; a gradual loss of lift for angles of attack up to and beyond that for the maximum lift coefficient resulted. As Compared with the stall of the plain wing, the initial stall of the wing with either partial-span or full-span flaps deflected occurred at a higher angle of attack and the stall progressed much more rapidly. The maximum lift coefficients at a Reynolds number of 4,850,000 were 1.35 for the plain wing, 2.25 for the wing with partial-span flaps at 60 deg, and 2.67 for the wing with full-span flaps at 60 deg. The positions of the aerodynamic center, in terms of mean chords back of the leading edge of the root section, were approximately 0.458 with no flaps, 0.483 with partial-span flaps at 60 deg, and 0.498 with full-span flaps at 60 deg.
    Keywords: Aerodynamics; Aircraft Design, Testing and Performance
    Type: NACA RB No. 3L13
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  • 37
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    Preliminary Investigation of the Effect of Compressibility on the Maximum Lift Coefficient, Special Report (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Preliminary data are presented on the variation of the maximum lift coefficient with Mach number. The data were obtained from tests in the 8-foot high-speed tunnel of three NACA 16-series airfoils of 1-foot chord. Measurements consisted primarily of pressure-distribution measurements in order to illustrate the nature of the phenomena. It was found that the maximum lift coefficient of airfoils is markedly affected by compressibility even at Mach numbers as low as 0.2. At high Mach numbers pronounced decrease of the maximum lift coefficient was found. The magnitude of the effects of compressibility on the maximum lift coefficient and the low speeds at which these effects first appear indicate clearly that consideration of the take-off thrust for propellers will give results seriously in error if these considerations are based on the usual low-speed maximum-lift-coefficient data generally used.
    Keywords: Aerodynamics
    Type: NACA-ACR-246 , NACA-SR-246
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  • 38
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    Determination of Flight Paths of an SBD-1 Airplane in Simulated Diving Attacks, Special Report (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation has been made to determine the motions of and the flight paths describe by a Navy dive-bombing airplane in simulated diving attacks. The data necessary to evaluate these items, with the exception of the atmospheric wind data, were obtained from automatic recording instruments installed entirely within the airplane. The atmospheric wind data were obtained from the ground by the balloon-theodolite method. The results of typical dives at various dive angles are presented in the form of time histories of the motion of the airplane as well as flight paths calculated with respect to still air and with respect to the ground.
    Keywords: Aircraft Stability and Control
    Type: NACA-ACR-248 , NACA-SR-248
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  • 39
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    NACA Radio Ground-Speed System for Aircraft, Special Report (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A method that utilizes the Doppler effect on radio signals for determining the speed of an airplane and the distance traveled by the airplane has been developed and found to operate satisfactorily. In this method, called the NACA radio ground-speed system, standard readily available radio equipment is used almost exclusively and extreme frequency stability of the transmitters is not necessary. No complicated equipment need be carried in the airplane, as the standard radio transmitter is usually adequate. Actual flight tests were made in which the method was used and the results were consistent with calibrated air speed indications and stop-watch measurements. Inasmuch as the fundamental accuracy of the radio method is far better than either of the checking systems used, no check was made on the limitations of the accuracy.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-ACR-256 , NACA-SR-256
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  • 40
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    The Effect of Compressibility on the Growth of the Laminar Boundary Layer on Low-Drag Wings and Bodies (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The development of the laminar boundary layer in a compressible fluid is considered. Formulas are given for determining the boundary-layer thickness and the ratio of the boundary-layer Reynolds number to the body Reynolds number for airfoils and bodies of revolution. It i s shown that the effect of compressibility will profoundly alter the Reynolds number corresponding to the upper limit of the range of the low-drag coefficients . The available data indicate that for low-drag and high critical compressibility speed airfoils and bodies of revolution, this effect is favorable.
    Keywords: Aerodynamics
    Type: NACA-ACR-252 , NACA-SR-252
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  • 41
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    Limitations of Lifting-Line Theory for Estimation of Aileron Hinge-Moment Characteristics (1943)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Hinge-moment parameters for several typical ailerons were calculated from section data with the aspect-ratio correction as usually determined from lifting-line theory. The calculations showed that the agreement between experimental and calculated results was unsatisfactory. An additional aspect-ratio correction, calculated by the method of lifting-surface theory, was applied to the slope of the curve of hinge-moment coefficient against angle of attack at small angles of attack. This so-called streamline-curvature correction brought the calculated and experimental results into satisfactory agreement.
    Keywords: Aerodynamics
    Type: AD-A801563 , NACA-WR-L-281 , NACA-CB-3L02
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  • 42
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    Determination of the Mass Moments and Radii of Inertia of the Sections of a Tapered Wing and the Center-of-Gravity Line along the Wing Span (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: For computing the critical flutter velocity of a wing among the data required are the position of the line of centers of gravity of the wing sections along the span and the mass moments and radii of inertia of any section of the wing about the axis passing through the center of gravity of the section. A sufficiently detailed computation of these magnitudes even if the weights of all the wing elements are known, requires a great deal of time expenditure. Thus a rapid competent worker would require from 70 to 100 hours for the preceding computations for one wing only, while hundreds of hours would be required if all the weights were included. With the aid of the formulas derived in the present paper, the preceding work can be performed with a degree of accuracy sufficient for practical purposes in from one to two hours, the only required data being the geometric dimensions of the outer wing (tapered part), the position of its longerons, the total weight of the outer wing, and the approximate weight of the longerons, The entire material presented in this paper is applicable mainly to wings of longeron construction of the CAHI type and investigations are therefore being conducted by CAHI for the derivation of formulas for the determination of the preceding data for wings of other types.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1052 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-452
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  • 43
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    Heat Transfer of Airfoils and Plates (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The few available test data on the heat dissipation of wholly or partly heated airfoil models are compared with the corresponding data for the flat plate as obtained by an extension of Prandtl's momentum theory, with differentiation between laminar and turbulent boundary layer and transitional region between both, the extent and appearance of which depend upon certain critical factors. The satisfactory agreement obtained justifies far-reaching conclusions in respect to other profile forms and arrangements of heated surface areas. The temperature relationship of the material quantities in its effect on the heat dissipation is discussed as far as is possible at tk.e present state of research, and it is shown that the profile drag of heated wing surfaces can increase or decrease with the temperature increase depending upon the momentarily existent structure of the boundary layer.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1044 , Jahrbuch 1938 der Deutschen Luftfahrtforschung; 245-256
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  • 44
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    Experimental Investigation of a Model of a Two-Stage Turboblower (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: In the present paper an investigation is made of two stages of a multistage turboblower having a vaneless diffuser behind the impeller and guide vanes at the inlet to the nest stage. The method employed was that of investigating the performance of the successive elements of the blower (the impeller, vaneless diffuser, ets.) whereby the kinematics of the flow through the blower could be followed and the pressure at the different points computed. The character of the flow and the physical significance of the loss coefficients could thereby be determined so as to secure the best agreement of the computed with the actual performance of the blower. Since the tests were carried out for various delivery volumes, the dependence of the coefficients on a number of factors (angle of attack, velocities, etc.) could be obtained. The distribution of the losses that occur during the transformation of dynamic pressure at the impeller exit into static pressure could be found and likewise the range within which the friction coefficient varies in the vaneless diffuser. With the aid of factors having a certain physical significance, the centrifugal blower could be computed on the basis of a more or less schematical consideration of the phenomena occuring during the air flow through it, and the use of arbitrary factors and recourse to the geometrical similtude law thus avoided. The present investigation largely summarizes all the previous work af the CHI Blower Section on the different elements of a centrifugal blower. Some considerations on the analysis of model test data for application to full-scale are presented in the appendix.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1043 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-191
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  • 45
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    Effect of Rivet Holes on the Ultimate Strength Developed by 24S-T and Alclad 75S-T Sheet in Incomplete Diagonal Tension (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: Strength tests were made of a number of 24S-T and Alclad 75S-T aluminum-alloy shear webs to determine the effect of rivet or bolt holes on the shear strength. Data were obtained for webs which approached a condition of pure shear stress as well as for webs with well-developed diagonal tension. The rivet factor, (pitch minus diameter) divided by pitch, was varied from approximately 0.81 to 0.62. These tests indicated that the shear stresses on the gross section were nearly constant for all values of the rivet factor investigated if the other properties of the web were not changed.
    Keywords: Metals and Metallic Materials
    Type: NACA-RM-L6I12
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  • 46
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    Turbulent Friction in the Boundary Layer of a Flat Plate in a Two-Dimensional Compressible Flow at High Speeds (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: In the present report an investigation is made on a flat plate in a two-dimensional compressible flow of the effect of compressibility and heating on the turbulent frictional drag coefficient in the boundary layer of an airfoil or wing radiator. The analysis is based on the Prandtl-Karman theory of the turbulent boundary later and the Stodola-Crocco, theorem on the linear relation between the total energy of the flow and its velocity. Formulas are obtained for the velocity distribution and the frictional drag law in a turbulent boundary later with the compressibility effect and heat transfer taken into account. It is found that with increase of compressibility and temperature at full retardation of the flow (the temperature when the velocity of the flow at a given point is reduced to zero in case of an adiabatic process in the gas) at a constant R (sub x), the frictional drag coefficient C (sub f) decreased, both of these factors acting in the same sense.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NACA-TM-1053 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-321
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  • 47
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    Theoretical Determination of Axial Fan Performance (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The report presents a method for the computation of axial fan characteristics. The method is based on the assumption that the law of constancy of the circulation along the blade holds, approximately, for all fan conditions for which the blade elements operate at normal angles of attack (up to the stalling angles). Pressure head coefficient K(sub a) and power coefficient K(sub u) for the force components in the axial and tangential directions, respectively, and analogous to the lift and drag coefficients C(sub y) and C(sub x) are conveniently introduced.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1042 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-295
    Format: application/pdf
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  • 48
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    Tail Buffeting (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: An approximate theory of buffeting is here presented, based on the assumption of harmonic disturbing forces. Two cases of buffeting are considered: namely, for a tail angle of attack greater and less than the stalling angle, respectively. On the basis of the tests conducted and the results of foreign investigators, a general analysis is given of the nature of the forced vibrations the possible load limits on the tail, and the methods of elimination of buffeting.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-TM-1041 , Report of the Central Aero-Hydrodynamical Institute, Moscow; Rept-395
    Format: application/pdf
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  • 49
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    The Coupling of Flexural Propeller Vibrations with the Torsional Crankshaft Vibrations (1943)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: The exact mathematical treatment of the problem is possible by replacing the propeller blade by a homogeneous prismatic rod. Conclusions can them be drawn as to the behavior of an actual propeller, since tests on propeller blades have indicated a qualitative agreement with the homogeneous rod. The natural frequencies are determined and the stressing of the systems under the various vibration modes are discussed.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1051 , Jahrbuch 1938 der Deutschen Luftfahrtforschung; 141-159
    Format: application/pdf
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  • 50
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    A Method of Estimating the Knock Rating of Hydrocarbon Fuel Blends (1943)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The usefulness of the knock ratings of pure hydrocarbon compounds would be increased if some reliable method of calculating the knock ratings of fuel blends was known. The purpose of this study was to investigate the possibility of developing a method of predicting the knock ratings of fuel blends.
    Keywords: Propellants and Fuels
    Type: AD-A301347 , NACA-TR-760 , NASA-TM-111362 , NAS 1.15:111362
    Format: application/pdf
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