 There was a central fin and rudder rising above the upper tailplane, which had a cut-out to allow the rudder to move, and there were two outboard vertical surfaces, again moving in cut-outs, to assist stability.These latter could be turned in flight to offset asymmetric engine-out forces.The undercarriage was narrow track, with pairs of mainwheels on both sides mounted vertically to the wing and cross braced, with a tailwheel at the rear.