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Originally Posted by sperry
I was exagerating about the guy getting knocked over... even misspelling "hyperbole" doesn't change that.... but the down wash is backed by physics, I'm not making it up... so feel free to bring it. The high angle of attack, which the Spit is at because it's rotated to climb out, will generate additional wash... like this:...
The down wash compresses the air below the wing, increasing it's efficiency, as long as the plane stays a few meters off the ground.
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I've seen this and other "ground effect" planes... Birds use it a lot as well. I'm not saying it doesn't exist, it just isin't a big 50+MPH blast is all.
This is the same pressure wave that makes it hard to land planes, and why they basically have to stall the wings to make them drop those last couple feet. You wouldn't have to flare if the damn plane would just continue decending, well, sort of... You have flown RC gliders. sometimes you alsmost have to nose them in to get the dang things to land. Most of mine have top spoilers that force the wing to stop working... Great for pinpoint landings in competition...
One of the coolest landings I ever did with my RC power planes was when I flared to early at about 10' off the ground, and the plane snap rolled and landed on it's wheels almost dead stopped. try that in a 737....
