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Analysis of Ground Effect on the Lifting AirscrewA study is presented of ground effect as applied to the lifting airscrew of the type used in modern gyroplane and helicopters. The mathematical analysis of the problem has been verified by tests made of three rotor models in the presence of a large circular "ground plane." A method of approximating the decelerating effect during vertical approach to the ground has been devised. The results of the study are presented in the form of convenient charts.
Document ID
19930081580
Document Type
Other
Authors
Knight, Montgomery (Georgia School of Technology)
Hegner, Ralph A (Georgia School of Technology)
Date Acquired
September 6, 2013
Publication Date
December 1, 1941
Report/Patent Number
NACA-TN-835
Accession Number
93R10870
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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