Has anyone thought or tried using a sailboat winch servo (three full revolutions on the head, end point to end point), with a cable and pulley system, to have an adjustable weight jack? You could put 1-3 oz of weight on the cable, have a pulley near the tail, and use the landing gear channel and atv to move your cg from precision and somewhat stable location, to " holy cow did you see that ", and then back to stable for landing. Wingspan99 and I have been talking about how to work this out, and it would definately be easier on a larger scale plane for many reasons. Access to the tail of the fuse is easier, the plane could handle the extra weight of the servo/pulley head, cable, and pulley system. And since most large scale planes need weight in the tail to balance, they could handle the extra and not see a degradation in performance. You could take a 2 oz weight, inline on the cable, and move it back upwards of 4-6 inches, depending on your pulley/head arrangement, which would alter your balance significantly. On a 15-20 lb plane, it wouldnt notice the overall weight increase, but it sure would boost performance, and sanity on landings.

They use weight jacks on race cars to alter thier balance during the race, why cant we do the same?

Feel free to give some input, positive, negative, or otherwise.

Steve