stona
SMF Supporter
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- Jul 22, 2008
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- Steve
You are both close!
There are two 30 cm diametre wheels.
Wheel 1 controls the trim of the tail plane. This had a 12 degree range from +3.5 to -8.5 degrees. It took 5.75 turns of the wheel to move the tailplane through the entire range.
Wheel 2 controls the flaps. It took four turns to lower the flaps fully down,42.5 degrees. As the flaps came down so did the ailerons,something modellers always miss. With the flaps fully down the ailerons would be 11 degrees down too. The flaps could of course be set in an intermediate position.
The advantage of having the two wheels so close together is that by winding both wheels together the pilot automatically compensated for changes in trim caused by lowering the flaps. Lowering the flaps gave rise to a fairly large nose-down pitching moment. This could be achieved using one hand. It's a very clever system and one of the things that British test pilots who flew the Bf109 all remarked on as a positive feature.
Cheers
Steve
There are two 30 cm diametre wheels.
Wheel 1 controls the trim of the tail plane. This had a 12 degree range from +3.5 to -8.5 degrees. It took 5.75 turns of the wheel to move the tailplane through the entire range.
Wheel 2 controls the flaps. It took four turns to lower the flaps fully down,42.5 degrees. As the flaps came down so did the ailerons,something modellers always miss. With the flaps fully down the ailerons would be 11 degrees down too. The flaps could of course be set in an intermediate position.
The advantage of having the two wheels so close together is that by winding both wheels together the pilot automatically compensated for changes in trim caused by lowering the flaps. Lowering the flaps gave rise to a fairly large nose-down pitching moment. This could be achieved using one hand. It's a very clever system and one of the things that British test pilots who flew the Bf109 all remarked on as a positive feature.
Cheers
Steve
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