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Comparison of Tests on Air Propellers in Flight with Wind Tunnel Model Tests on Similar FormsThe purpose of this investigation was to determine the performance, characteristics, and coefficients of full-sized air propellers in flight and to compare these results with those derived from wind-tunnel tests on reduced scale models of similar geometrical form. The full-scale equipment comprised five propellers in combination with a VE-7 airplane and Wright E-4 engine. This part of the work was carried out at the Langley Memorial Aeronautical Laboratory, between May 1 and August 24, 1924, and was under the immediate charge of Mr. Lesley. The model or wind-tunnel part of the investigation was carried out at the Aerodynamic Laboratory of Stanford University and was under the immediate charge of Doctor Durand. A comparison of the curves for full-scale results with those derived from the model tests shows that while the efficiencies realized in flight are close to those derived from model tests, both thrust developed and power absorbed in flight are from 6 to 10 per cent greater than would be expected from the results of model tests.
Document ID
19930091287
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Durand, W F
Lesley, E P
Date Acquired
September 6, 2013
Publication Date
January 1, 1926
Report/Patent Number
NACA-TR-220
Report Number: NACA-TR-220
Accession Number
93R20577
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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