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Ground influence on aerofoils / by Arthur E. Raymond.
- Format:
- Book
- Government document
- Author/Creator:
- Raymond, Arthur E., author.
- Series:
- Technical note (United States. National Advisory Committee for Aeronautics) ; 67.
- Technical notes / National Advisory Committee for Aeronautics ; No. 67
- Language:
- English
- Subjects (All):
- Aerofoils.
- Ground-cushion phenomenon.
- Lift (Aerodynamics).
- Physical Description:
- 1 online resource (8 pages, 8 unnumbered pages) : illustrations
- Place of Publication:
- [Washington, D.C]. : National Advisory Committee for Aeronautics, 1921.
- Summary:
- The question of ground influence on airplanes has recently attracted some attention in view of the claims made by certain designers that landing speed of their airplanes is much decreased by an increas in life coefficient due to the proximity of the ground in landing.
- Ground effect is not entirely beneficial. It decreases the landing speed and cushions the landing shock somewhate, but does so at the expense of an increased length of preliminary skimming over the ground. By decreasing the drag and increasing the life it lengthens the distance necessary for the airplane to travel before losing enough speed to land. On the other hand, it is helpful in taking off, especially in the case of flying boats with their low-lying wings. It points to the fact that the closer the wings are to the ground the easier it is to pick up speed and promises economy for low-skimmig flight over smooth water, provided such flight be practical.
- Notes:
- Title from title screen (viewed July 1, 2019).
- "December, 1921."
- "Submitted as a thesis in the graduate course in Aeronautical Engineering in 1921, and published by permission of the Department of Physics at the Massachusetts Institute of Technology"--Page 1
- No Federal Depository Library Program (FDLP) item number.
- Includes bibliographical references (page 2).
- Print version record.
- Other Format:
- Print version: Raymond, Arthur E. Ground influence on aerofoils
- OCLC:
- 1107323809
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