"I've benn very interested in this topic... I had an idea, that maybe could be a bit crazy but enough to save the expensive RED cameras: something similar to the ejection seat on the planes with a paragliding...
now you solves two…"
"I agree, of course.... I use a bit of kite string which I run up through two pulleys to the ceiling then across the room, where it attaches to a medium sized wrench to act as a stop so the 'copter does not fall all the way to the ground, and…"
"I like your set-up. I don't have anything so sophisticated but I use a rotating plate for testing yaw...the issue I find is that even though it's got ball-bearings and has relatively low friction the extra mass of the plate and the…"
* extendable mast pole so it can freely move up/down by 1m
* cross frame from CNC machine to allow the entire mount to move in X and Y freely by 1m in 2D
Make these low friction and it will be better able to test your copters."