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  • AERODYNAMICS  (10)
  • Mechanical Engineering  (10)
  • Animals
  • Getreide
  • 1945-1949  (20)
  • 1925-1929  (3)
  • 1947  (18)
  • 1946  (2)
  • 1927  (3)
  • 1
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    Welchen Einfluss hat die ungünstige Witterung dieses Winters auf die Entwicklung unserer Kulturpflanzen? (1927)
    In:  Hannov. land- und forstw. Zeitg.:93-95
    Details
    Publication Date: 1927
    Description: Beschreibung der Witterungsverläufe der Winter und Empfehlungen für die Bodenbearbeitung und Bestandesführung von Winterkulturen KATASTER-BESCHREIBUNG: Einfluss der Witterung (Niederschlag und Temperatur) auf den Ertrag KATASTER-DETAIL: Delta Nied (Vorjahr) ++, dann Ertrag -; Delta Nied (Winter) +, dann Bodenfeuchte + und somit Ertrag +; Delta T (November) -, dann Ertrag -; Delta T (Winter) +, dann Ertrag +; Delta T (Frühling) +, dann Ertrag -;
    Keywords: Niedersachsen ; 1924-26 ; Insekten ; Ertrag ; Getreide ; Landwirtschaft ; Niederschlag ; Pflanzenschädling ; Roggen ; Weizen ; Düngung ; Gerste
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    BIBLIOGRAPHY INKA BB
  • 2
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    Die Weißährigkeit des Weizens und ihre Ursachen (Ophiobolus herpotrichus u.a.) (1927)
    In:  Landwirtschaftliche Wochenschrift der Provinz Sachsen und Anhalt 29; p.668-670
    Details
    Publication Date: 1927
    Description: Der Autor führt aufgrund von Beobachtungen das Auftreten der Weißährigkeit auf Fußkrankheiten und Fusariumpilze, sowie landwirtschaftliche Praktiken zurück. In einem kleinen Abschnitt wird auch auf den Einfluß von Witterung und Bodenverhältnissen eingegangen. KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Sachsen, Sachsen-Anhalt ; 1926-1927 ; Getreide ; Pflanzenkrankheit ; Weizen
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    BIBLIOGRAPHY INKA BB
  • 3
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    Die Beziehung zwischen Bodentemperatur und Lufttemperatur und ihrem Einfluss auf den Ernteertrag. (1927)
    In:  Fortschr. Landw. 2:205-212.
    Details
    Publication Date: 1927
    Description: Untersuchungen über die Gründe für die schlechte Getreideernte im Donau-Einzugsgebiet des Jahres 1924, Zusammenhang zwischen der Luft- und Bodentemperatur, dem Pflanzenwachtum und dem Ertrag KATASTER-BESCHREIBUNG: Korn-Stroh-Verhältnis wird beeinflusst von dem Verhältnis der Boden- zur Lufttemperatur, KATASTER-DETAIL: Delta T (Diff. Boden zu Luft im Mai) 〈 0, dann ertragsrelevant
    Keywords: Bayern ; 1913-15, 1924-26 ; Ertrag ; Getreide ; Temperatur ; Frost
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    BIBLIOGRAPHY INKA BB
  • 4
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    NACA Conference on Boundary Layers. A compilation of the papers presented (1947)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: AERODYNAMICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Summary of NACA submerged-inlet investigations (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 49-52
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  • 6
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    Lift and drag characteristics of a wing with several angles of sweep at high subsonic speeds (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA. Ames Aeron. Lab. NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 21-28
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  • 7
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    Investigation of side inlets at supersonic speeds (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 53-57
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  • 8
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    A review of recent information relating to the drag rise of airplanes (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA. Ames Aeron. Lab. NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 3-13
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  • 9
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    Prediction of the aerodynamic characteristics of wings of arbitrary plan form (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 95-100
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  • 10
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    Nose inlets (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA. Ames Aeron. Lab. NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 43-48
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  • 11
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    Airfoil section characteristics at high subsonic speeds (1947)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Keywords: AERODYNAMICS
    Type: NACA Conf. on Aerodyn. Probl. of Transonic Airplane Design; p 15-20
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  • 12
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    Effect of Misalignment of Strain-gage Components of Strain Rosettes (1946)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: No abstract available
    Keywords: Mechanical Engineering
    Type: NACA-TN-1133
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  • 13
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    Possibilities for drag reduction by boundary layer control (1946)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The mechanics of laminar boundary layer transition are reviewed. Drag possibilities for boundary layer control are analyzed using assumed conditions of transition Reynolds number, inlet loss, number of slots, blower efficiency, and duct losses. Although the results of such analysis are highly favorable, those obtained by experimental investigations yield conflicting results, showing only small gains, and sometimes losses. Reduction of this data indicates that there is a lower limit to the quantity of air which must be removed at the slot in order to stabilize the laminar flow. The removal of insufficient air permits transition to occur while the removal of excessive amounts of air results in high power costs, with a net drag increases. With the estimated value of flow coefficient and duct losses equal to half the dynamic pressure, drag reductions of 50% may be obtained; with twice this flow coefficient, the drag saving is reduced to 25%.
    Keywords: AERODYNAMICS
    Type: NASA-CR-145337 , D-7625
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  • 14
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    Investigation of suction-slot shapes for controlling a turbulent boundary layer (1947)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Keywords: AERODYNAMICS
    Type: NACA-TN-1292 , NASA-TM-79866
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  • 15
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    Investigation of Turbine of Mark 25 Torpedo Power Plant with Five Nozzle Designs (1947)
    In:  CASI
    Details
    Publication Date: 2019-08-17
    Description: Efficiency investigations were made on the two-stage turbine from a Mark 25 aerial torpedo to determine the performance of the unit with five different turbine nozzles. The output of the turbine blades was computed by analyzing the windage and mechanical-friction losses of the unit. A method was developed for measuring the change in turbine clearances with changed operating conditions. The turbine was found to be most efficient with a cast nozzle having a sharp-edged inlet to the nine nozzle ports.
    Keywords: Mechanical Engineering
    Type: NACA-RM-E7I03
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  • 16
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    Performance of the 19XB 10-Stage Axial-Flow Compressor (1947)
    In:  CASI
    Details
    Publication Date: 2019-08-13
    Description: The 19xB compressor, which replaces the 19B coaapreseor and has the same length and diameter 88 the 19B compressor, was designed with 10 stages to deliver 30 pounds of air per second for a pressure ratio of 4.17 at an equivalent speed of 17,000 rpm; the 19B was designed with six stages for a pressure ratio of 2.7 at the same weight flow and speed as the 19XB compressor. The performance characteristics of the new compressor were determined at the NACA Cleveland laboratory at the request of the Bureau of Aeronautics, Navy Department. Results are presented of the investigation made to evaluate the over-all performance of the compressor, the effects of possible leakage past the rotor rear air seal, the effects of inserting instruments in each row of stator blades and in the first row of outlet guide vanes, and the effects of changing the temperature and the pressure of the inlet air. The results of the interstage surveys are also presented.
    Keywords: Mechanical Engineering
    Type: NACA-RM-E6L04
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  • 17
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    The Distribution of Loads on Rivets Connecting a Plate to a Beam under Transverse Loads (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-11
    Description: This report gives theoretical discussion of the distribution of leads on rivets connecting a plate to a beam under transverse leads. Two methods of solution are given which are applicable to loads up to the limit of proportionality; in the first the rivets are treated as discrete members, and in the second they are replaced by a continuous system of jointing. A method of solution is also given which is applicable to the case when nonlinear deformations occur in the rivets and the plate, but not in the beam. The methods are illustrated by numerical examples, and these show that the loads carried by the rivets and the plate are less than the values given by classical theory, which does not take into account the slip of the rivets, even below the limit of proportionality. The difference is considerably accentuated when nonlinear deformations occur in the restructure and the beam then carries the greater portion of the bending moment. If the material of the beam has a higher proportional limit and a higher ultimate strength than the material of the plate, there is thus a transfer of load from weaker to stronger material, and this is to the advantage of the structure. The methods given are of simple application and are recommended for use in the design of light-alloy structures when the design lead is likely to be above the proportional limit.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1134 , SME; SME-3301
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  • 18
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    Coefficient of Friction, Oil Flow and Heat Balance of a Full-Journal Bearing (1947)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: Mechanical Engineering
    Type: AD-B204941 , NACA-TM-1165 , NASA-TM-111363 , NAS 1.15:111363
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  • 19
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    Determination of the Stress Concentration Factor of a Stepped Shaft Stressed in Torsion by Means of Precision Strain Gages (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The stress distribution in stepped shafts stressed in torsion is determined by means of the electric precision strain gage the stress concentration factor is ascertained from the measurements. It is shown that the test values always are slightly lower than the values resulting from an approximate formula.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1179 , Berlin-Adlershof; 20; 7; 217-219
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  • 20
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    Cooling Characteristics of the V-1650-7 Engine. II - Effect of Coolant Conditions on Cylinder Temperatures and Heat Rejection at Several Engine Powers (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An investigation has been conducted on a V-1650-7 engine to determine the cylinder temperatures and the coolant and oil heat rejections over a range of coolant flows (50 to 200 gal/min) and oil inlet temperatures (160 to 2150 F) for two values of coolant outlet temperature (250 deg and 275 F) at each of four power conditions ranging from approximately 1100 to 2000 brake horsepower. Data were obtained for several values of block-outlet pressure at each of the two coolant outlet temperatures. A mixture of 30 percent by volume of ethylene glycol and 70-percent water was used as the coolant. The effect of varying coolant flow, coolant outlet temperature, and coolant outlet pressure over the ranges investigated on cylinder-head temperatures was small (0 deg to 25 F) whereas the effect of increasing the engine power condition from ll00 to 2000 brake horsepower was large (maximum head-temperature increase, 110 F).
    Keywords: Mechanical Engineering
    Type: NACA-RM-SE7I02
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  • 21
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    Investigations on Experimental Impellers for Axial Blowers (1947)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: A selection of measurements obtained on experimental impellers for axial blowers will be reported. In addition to characteristic curves plotted for low and for high peripheral velocities, proportions and blade sections for six different blower models and remarks on the design of blowers will be presented.
    Keywords: Mechanical Engineering
    Type: NACA-TM-1123 , ZWB, M94, Nr. 3135; 1-28
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  • 22
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    Vibration Survey of Blades in 19XB Axial-Flow Compressor (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Strain-gage measurements were taken under operating conditions from blades of various stages of the 19XB axial-flow compressor in an effort to determine the reason for failures in the seventh and tenth stages. First bending-mode vibrations were detected in the first five stages of the compressor caused by each integral multiple of rotor speed from three through ten. Lead-wire failures in the last five stages resulted in incomplete data. The dynamic-vibration frequencies at various rotor speeds were compared with statically measured frequencies analytically corrected for the influence of centrifugal force. Large increases in vibration ani~litude with increased pressure ratio were observed. During surging operation, blade vibrations were not present. The effects of pressure ratio and surge indicate the existence of aerodynamic excitation as the cause of the blade vibrations.
    Keywords: Mechanical Engineering
    Type: NACA-RM-E7D09
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  • 23
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    An Analysis of the Full-Floating Journal Bearing (1947)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An analysis of the operating characteristics of a full-floating bearing - a bearing in which a floating sleeve is located between the journal and bearing surfaces - is presented together with charts - from which the performance of such bearings may be predicted. Examples are presented to illustrate the use of these charts and a limited number of experiments conducted upon a glass full-floating bearing to verify some results of the analysis are reported. The floating sleeve can operate over a wide range of speeds for a given shaft speed, the exact value depending principally upon the ratio of clearances and upon the ratio of radii of the bearing. Lower operating temperatures at high rotative speeds are to be expected by using a full-floating bearing. This lower operating temperature would be obtained at the expense of the load-carrying capacity of the bearing if, for comparison, the clearances remain the same in both bearings. A full-floating bearing having the same load capacity as a conventional journal bearing may be designed if decreased clearances are allowable.
    Keywords: Mechanical Engineering
    Type: NACA-RM-E7A28a
    Format: application/pdf
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