When you shorten the effective wheelbase the most notible effect will be directional instability during takeoff something that is exacerbated by the large fourstroke.
The takeoff problems can be avoided simply by using a racing launch just like the popular warbird pylon racing. Actually various T-34's with vastly over sized four strokes are popular in this type of pylon.
The launch method is not the typical slow throttle up which allows things to get out of hand, instead the caller typically positions the airplane in the t/o position and the pilot runs up the engine to half or as much as full power. The pilot sets full right rudder and postions the elevator where needed. Then and only then the pilot nods for releast to the caller. This is a far safer and easier method to launch any airplane that may have directional problems on takeoff and particularly ones with vastly oversized engines.
Neat project
John
