GRAUPNER Skalar, Manual

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elektro
Skalar
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this prevents the rotor plane tilting excessively in forward flight. In model helicopters a single
hinge shared by both blades has proved an effective solution to the problem.
Auto-rotation
This term refers to a helicopter flying without motor power. The rotational speed of the main rotor
can be kept high by setting both blades to negative pitch, and the airflow through the rotor as it
descends then keeps the blades turning. The rotational energy stored in the rotor by this means
can be converted into upthrust when the helicopter is close to the ground, by the pilot applying
positive collective pitch. Of course, this can only be done once, and it has to be done at the
correct moment. Auto-rotation allows a model helicopter to land safely when the motor fails, just
like a full-size machine.
However, auto-rotation places considerable demands on the pilot’s judgement and reflexes; you
can only halt the machine’s descent once, and you must not „flare“ too early or too late. Much
practice is required to get it right.