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Anthony, you've got the issue of compressibility precisely backwards. No
surprise. Rip Mxsmanic wrote: Rip writes: I don't know, but I'm going to find out! I can envision an aircraft with light wing loading, like a Cessna for instance, compressing the air locally as it creates lift. After passage of the wing, the lift created downwash would rebound upward, kind of like skipping a stone on the water. Virtually no compression occurs at the speeds of a Cessna. Compression is only an issue at high speeds. At low speeds, air behaves very much like an imcompressible fluid. The end result is that the downwash stays at a constant altitude, or sinks MUCH more slowly than theory would indicate. The downwash does not stay at a constant altitude. It sinks. It has to, otherwise the aircraft couldn't stay in the air. |
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Actually, he doesn't.
mike "rq3" wrote in message . net... Anthony, you've got the issue of compressibility precisely backwards. No surprise. Rip |
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