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#16
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At 06:00 26 February 2005, Eric Greenwell wrote:
I start using crab when I'm close to full rudder in the side-slip, which can happen in strong cross winds. The low wing still seems sufficiently high at that point, but I don't have a measurement for the angle it makes with the ground. Regardless, it's very rare that I've had to land where the height of the grass or bushes was a concern. If I routinely landed where the wing tips were over 20'-30' high grass, perhaps I'd be using a crab instead. Here's some interesting data. ASK-21's have quite a bit of dihedral and relatively stiff wings as compared to most fiberglass single place gliders. A K-21 pilot landing with the upwind wing leading edge parallel to the ground has a 3.5 degree bank. If he was foolhardy enough to touch down with the main wheel and upwind wing at the same time, he would be in a 6.5 degree bank. So it might seem reasonable to expect that a pilot proficient in side slips would therefore maybe be willing to touch down with a 5 degree bank. M Eiler |
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