Hi johnny, A few years ago I worked up this airplane powered by a TT 61Pro. It was a bit trickey but under the fuselage is a servo that pulls a pin and the horizontal stabilizer/elevator falls off in flight on command. It is aided with a spring that pops it off with a nice loud report.

The gag goes something like this I takeoff on low power (high power would cause a steep pitch up uncontrollable with the stabilizer still attached ). Fly a stabile circuit and twenty feet stage center over the runway I drop the stab which departs with a loud bang and imediately pull into a vertical climb yelling to my caller to 'give me down trim' who pretends to be trying to get the trims for me. Next step is to pitch into a series of outside snaps and then make a lousy approach
and a landing that is not pretty (Thats a hard thing to fake).

Will get some pics up in a few minutes to avoid a time out, haven't flown the ship in may about five years now.

John