Matt Kirsch
Posts: 7037
Joined: 7/5/2002 From: Rochester, NY, USA Status: offline
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Those sound like pilot problems to me. Those "doughnuts" the plane was doing is called "ground looping." It is a problem that is very common on airplanes with conventional landing gear. Most of the time it can be controlled through skillful use of the rudder. Using full up elevator is the WORST thing you can do, and only makes the problem worse. You need to get the tail off the ground so the fin and rudder can "bite" the air and keep the tail straight. Also, by holding full up elevator, you encourage the airplane to take off too early, which will result in the plane tip-stalling, flipping over, and crashing on takeoff. It takes skill to make a successful ROG takeoff with a taildragger like the Decathlon. This is NOT a beginner's plane. As for your problems with hand launching, they're typical of a pilot who does not have much time on the sticks. You probably chucked the plane UP into the air, and are yanking and slamming the controls every which way in a futile attempt to get it to fly. As with the ground looping problem, all you're doing is making things WORSE! You're launching the plane UP into a partial stall. When the plane is stalled, the control surfaces have little or no effect. All they do is create more drag and keep the airplane from getting up to flying speed. Eventually, the plane tip-stalls, flips over, and crashes. This will happen no matter what plane you have if you don't fly it properly. When you launch, it should be straight ahead, or even slightly down. Let the plane build up some speed before you try to maneuver it. Concentrate on keeping the nose and wings level, then work into gentle turns. If you do launch it upwards by accident, the first thing you should do is give the plane some DOWN elevator to get the nose level, or even pointed a bit downwards. Many less-experienced people instinctively yank back on the elevator as if it were some magical UP-stick... Anyway, I hope you can use this information to improve your piloting skills and have better luck with your Decathlon next time.
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