f07_ps03_spring04

f07_ps03_spring04 - Spring 2004 Unified Engineering Fluids...

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Unformatted text preview: Spring 2004 Unified Engineering Fluids Problems F7 F7. The profile drag of a particular wing is assumed to be some given constant over the expected range of operating CL ’s. cd � constant For an elliptically-loaded wing of some aspect ratio AR . . . a) Determine the operating CL at which the lift/drag ratio CL /CD is maximized. This is the desirable operating p oint for maximum range. Determine how the CD at this operating p oint compares to cd . 3/2 b) Determine the operating CL at which the “power coefficient” CL /CD is maximized. This is the desirable operating p oint for maximum endurance. Determine how the CD at this operating p oint compares to cd . ...
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This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.

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