I've been thinking...
I've noticed that ground interaction has been known to be troublesome automated takeoffs and landings.
My IEEE student chapter robotics team has been playing with pressure sensitive resistors recently. I was thinking of making some feet out of these sensors, and mounting them at the four corners of the landing gear to provide a seperate feedback control for when the heli is interacting with the ground. Would that be a useful feature? I think my team and I could probably code that.
I'm a bit confused (although that is easy to do these days), what are you trying to accomplish?
Updated thread is here:
Ok, cool. Yeah I'd say that would be a useful feature, people with camera's or other sensitive equipment on their heli's might like a soft landing.
If the heli's skids are flexible enough, you may be able to use the flex sensor and get a more analog voltage than with the piezos.
You might even be able to play with some memory metal, athough I'm not sure how that would go.