RC Heli Autorotation

If you know how to perform an RC autorotation, you will save yourself a lot of money

Autorotation is that technique by which the helicopter is brought down
safely even when it engines stops working properly.

This is very important
in the times of engine failure. To practice it, the RC heli flyer stops
the engine and enters the helicopter in an autorotation mode.

Autorotation is possible due to the presence of free wheeling unit in
the rotor of the radio controlled helicopters. The free wheeling unit
is somewhat like clutch of an automobile.

It is the link between the engine and the rotor and is the element which
transfer motion from engine to the rotor just like clutch in an automobile
is used to act as a link between the engine and the driving wheels.

When the engine of a radio controlled helicopter fails or is shut down
on purpose, the helicopter enters in an autorotation mode in which the
link with the engine is automatically removed and the rotor rotates directly
without being connected to the engine.

When the helicopter is running the blades and hence the rotor acquires
much inertial force due to continuous rotation. When the engine fails,
then the power from the engine is stopped but the rotor which was revolving
at a real high speed still have stored much inertial power due to rotation.

So the free wheeling unit comes in play and the inertial force stored
in the rotor is used to land the helicopter safely in the ground.

To practice the autorotation method, the power to the engine is cut on
purpose. And the free wheeling unit starts to works due to the fact that
power or motion from the engine suddenly stops. The radio controlled helicopter
is then brought back to the ground safely by using the inertial power
stored in the helicopter rotor.

On a real helicopter, the technique of autorotation saves lives but autoroation
on a RC helicopter can save you a lot of money, by not slamming the RC
helicopter to ground.

One piece of advice that I can give you is to try to practice auto rotation
as much as you can, because it will come in handy on those unexpected
engine fails. Trust me it will happen.