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  • 1
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    The aerodynamic characteristics of seven frequently used wing sections at full Reynolds number (1927)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report contains the aerodynamic properties of the wing sections U.S.A. 5, U.S.A. 27, U.S.A. 35 A, U.S.A. 35 B, Clark Y, R.A.F. 15, and Gottingen 387, as determined at various Reynolds numbers up to an approximately full scale value in the variable density wind tunnel of the National Advisory Committee for Aeronautics. It is shown that the characteristics of the wings investigated are affected greatly and in a somewhat erratic manner by variation of the Reynolds number. In general there is a small increase in maximum lift and an appreciable decrease in drag at all lifts.
    Type: NACA-TR-233
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    The Variable Density Wind Tunnel of the National Advisory Committee for Aeronautics (1926)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report contains an exact description of the new wind tunnel of the National Advisory Committee for Aeronautics. This is the first american type wind tunnel. It differs from ordinary wind tunnels by its being surrounded by a strong steel shell, 35 feet long and 15 feet in diameter. A compressor system is provided to fill this shell - and hence the entire wind tunnel - with air compressed to a density up to 25 times the ordinary atmospheric density. It is demonstrated in the report that the increase of the air density makes up for a corresponding decrease in the scale of the model. Hence such american type wind tunnel is free from scale effect. The report is illustrated by many drawings and photographs. All construction details are described, and many dimensions given. The method of conducting tests is also described and some preliminary results given in the report. So far, the tests have confirmed the chief feature of this wind tunnel - absence of scale effect.
    Type: NACA-TR-227
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Model tests with a systematic series of 27 wing sections at full Reynolds number (1926)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A systematic series of 27 wing sections, characterized by a small travel of the center or pressure, have been investigated at 20 atmospheres pressure in the variable density wind tunnel of the National Advisory Committee for Aeronautics. The results are consistent with each other, and indicate that for such "stable" sections a small effective camber, a small effective S-shape and a thickness of 8 to 12 per cent lead to good aerodynamic properties.
    Type: NACA-TR-221
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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