I don't recall seeing many choices in left-hand rotation blades for Graupner (or Sonic Tronics) folding props back then (and I haven't looked lately).

George, sorry to see the carnage....

I don't suppose quadcopter speed controllers (or flight controllers) have any reason to have motor brakes in their software/hardware. If they did, that could be a way to keep the props from windmilling on boost.

Many (if not most) ESCs intended for fixed-wing airplanes have a brake mode. In some cases how fast it comes on and how much it brakes is also configurable.

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Bernard Cawley
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