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  • Aircraft Propulsion and Power  (2)
  • Seismicity  (2)
  • Seismology  (2)
  • Aerodynamics; Aircraft Design, Testing and Performance  (1)
  • 1975-1979
  • 1955-1959
  • 1940-1944  (6)
  • 1940  (6)
  • 1
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    Unknown
    Experimental Determination of Exhaust Gas Thrust, Special Report (1940)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: This investigation presents the results of tests made on a radial engine to determine the thrust that can be obtained from the exhaust gas when discharged from separate stacks and when discharged from the collector ring with various discharge nozzles. The engine was provided with a propeller to absorb the power and was mounted on a test stand equipped with scales for measuring the thrust and engine torque. The results indicate that at full open throttle at sea level, for the engine tested, a gain in thrust horsepower of 18 percent using separate stacks, and 9.5 percent using a collector ring and discharge nozzle, can be expected at an air speed of 550 miles per hour.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-SR-139
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Flight Tests of Exhaust Gas Jet Propulsion, Special Report (1940)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Flight test s were conducted on the XP-41 airplane, equipped with a Pratt & Whitney R1830-19, 14-cylinder, air-cooled engine, to determine the increase in flight speed obtainable by the use of individual exhaust stacks directed rearwardly to obtain exhaust-gas thrust. Speed increases up to 18 miles per hour at 20,000 feet altitude were obtained using stacks having an exit area of 3.42 square inches for each cylinder. A slight increase in engine power and decrease in cylinder temperature at a given manifold pressure were obtained with the individual stacks as compared with a collector-ring installation. Exhaust-flame visibility was quite low, particularly in the rich range of fuel-air ratios.
    Keywords: Aircraft Propulsion and Power
    Type: NACA-SR-165
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Flight Measurements of Stick Vibration of the YG-1B Autogiro Equipped with Tapered Rotor Blades (1940)
    In:  CASI
    Details
    Publication Date: 2018-06-05
    Description: Records were made in f1iht of the periodic variation in the load in the control system of a YG-1B autogiro fitted with a new set of tapered rotor blades designed to eliminate periodic blade twist. Comparison with similar records obtained previously in tests of the ori6inal blades shows that the new blades considerably reduce the vibration of the control stick.
    Keywords: Aerodynamics; Aircraft Design, Testing and Performance
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Seismicity of the earth (1940)
    In:  Bull. Geol. Soc. Am., Milano, Gustav Fischer, vol. 51, no. 6, pp. 1958, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1940
    Keywords: Seismicity
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Seismological Tables (1940)
    British Association for the Advancement of Science, Gray Milne Trust
    In:  London, 50 pp., 4th print., 1970, British Association for the Advancement of Science, Gray Milne Trust, vol. 46, no. XVI:, pp. 1-14, (ISBN: 0-387-30752-4)
    Details
    Publication Date: 1940
    Keywords: Earth model, also for more shallow analyses ! ; Travel time ; Seismology ; Handbook of geophysics
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Deep focus earthquakes in America (1940)
    University of California Press
    In:  Pacific Science Association, 6th Congress Proceedings, vol. 1, Toronto, University of California Press, vol. 10, no. GL-TR-89-0230, pp. 149-150, (ISBN 3-933346-037)
    Details
    Publication Date: 1940
    Keywords: Seismology ; Seismicity ; Hypocentral depth
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    BIBLIOGRAPHY SEISMOLOGY
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