the AA, and the new jet are 2 channel, two motors, one channel for each. the Tri-Fusion/hydrofoam are 3 channel, two motors, one elevator, one channel for each.

also, as monstermaker has been saying, you wouldnt need a rudder to control the plane, boat, jet, while its on water or land. the only differance water or land makes is the resistance the vehicle has to travel over. thrust differential is thrust differential, the motors do the work of the rudder, whether on land, sea, or air.

nick