How to Build an Auto Giro Plans 1

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BEFORE YOU conclude that this is a model
of a helicopter, take another look. It’s a model
plane with a spinning wing, or rotor, that windmills in the slip stream of a conventional propeller to provide the lift necessary for flight. The
rotor is self-spinning and that’s where the autogiro or gyroplane, as it is now called, differs
from the airplane and the helicopter in appearance, in flying characteristics and also in construction. And on the end of a control line it
is a new experience for model-plane fans.
Control-line gyros have been built, of course,
and flown with fair success. But none could be
considered spectacular performers. Some showed
a persistent tendency to roll up in the control
lines and some that performed satisfactorily
otherwise developed an arm-shaking vibration.
This appears to have been largely due to use of a
rigid motor which tended to develop a condition
of unbalance while in flight. The rocker-type, or
seesaw, rotor used in this model starts spinning
quickly and easily and the gyro lifts off and flies
smoothly without dipping, diving or rolling. It
pulls hard, but not too hard, on the control lines
and settles as lightly as an autum leaf when the
motor fades.
The fuselage is simply an elongated balsa box
made mostly from 3/32-in. material except the
bulkheads, A, B and C, and the stabilizer which






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