ORIGINAL: sheik480
I think we're talking about two different types of gyros. A heli gyro isn't an actual spinning gyroscope, its a sensor between the servo and reciever that sends a modified signal to the servo to correct unwanted movement. I hope that can clear some things up.
It has been tried before. If you do a search over on the other motorcycle forum (been reprimanded here before for naming it) you'll find that the subject has come up several times and has been tested by a few people. I believe both standard rate gyros and head holding gyros have been tried. I played with one for a while before moving on to another idea...
They can be effective when running straight, but end up causing problems for turning...
Dave