Quote:
Originally Posted by slakjaw
What's a collector ?
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Others have already chimed in, but it controls the angle of the helicopter blades, full down, would invert the force, holding the helicopter to the ground.
Go watch some videos of stunt RC helicopters being flown, they fly full throttle at all times, and control what they are doing with the collective, they can fly upside down by reversing pitch.
There is a lot of rotational mass in the rotor, and engine assembly, you can't make quick adjustments with the throttle to control the helicopter, so instead, you control the angle of the blade.