Originally Posted by rdwoebke
One way to do it is with these little altimeter circuits. The newer ones have a way to put the circuit between the speed controller port on the receiver and the speed controller. This allows folks to configure a cut off altitude. As long as people don't have crazy high powered planes that would coast a bunch after the motor cuts out, altitudes should be very similar.
Many folks already have or are interested in getting altimeter devices to play with flight logs and such after the flight (post flight analysis) so as time goes on and more of these things are commonplace that could be a good solution.
I've been testing a ZLOG altitude logger/cutoff switch in an AVA and an E-Blaster to see how they might fit in an altitude limited device. I am working on an article on the results. I think there is a place for these types of devices in some event.