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  • 1
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    Unknown
    Recent Results in Rocket Flight Technique (1942)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The concept of the effective ejection velocity of a rocket engine is explained and the magnitude of the attainable ejection velocity theoretically and experimentally investigated. Velocities above 3000 meters per second (6700 mph) are actually measured and the possibilities of further increases shown.
    Type: NACA-TM-1012
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Air admixture to exhaust jets (1953)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The problem of thrust increase by air admixture to exhaust jets of rockets, turbojet, ram- and pulse-jet engines is investigated theoretically. The optimum ratio of mixing chamber pressure to ambient pressure and speed range for thrust increase due to air admixture is determined for each type of jet engine.
    Type: NACA-TM-1357
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Approximate calculation of multispar cantilever and semicantilever wings with parallel ribs under direct and indirect loading (1932)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A method is presented for approximate static calculation, which is based on the customary assumption of rigid ribs, while taking into account the systematic errors in the calculation results due to this arbitrary assumption. The procedure is given in greater detail for semicantilever and cantilever wings with polygonal spar plan form and for wings under direct loading only. The last example illustrates the advantages of the use of influence lines for such wing structures and their practical interpretation.
    Type: NACA-TM-680
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Unknown
    The gas kinetics of very high flight speeds (1950)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The aerodynamic forces on bodies of arbitrary shape were investigated under conditions such that the mean free path of the air molecule is greater than the dimensions of the body. Air pressures and friction forces were calculated from gas kinetic theory for surfaces facing both toward and away from the air stream at any angle. Air forces for an atmosphere of definite composition (molecular hydrogen) were calculated as a function of the flight velocity. The results indicate that the friction stresses between the air and the body surface are of the same magnitude as the dynamic pressure and as the air pressures normal to the surface. The application of the general method to the specific cases such as thin airfoils and projectiles leads to high drag coefficients and poor glide ratios even for the theoretically best wing sections.
    Type: NACA-TM-1270
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    Accurate calculation of multispar cantilever and semicantilever wings with parallel webs under direct and indirect loading (1932)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: In the present report the computation is actually carried through for the case of parallel spars of equal resistance in bending without direct loading, including plotting of the influence lines; for other cases the method of calculation is explained. The development of large size airplanes can be speeded up by accurate methods of calculation such as this.
    Type: NACA-TM-662
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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