the d.63 was wood framed and covered with a mixture of plywood and fabric. it was a low wing cantilever monoplane with 5.83° of dihedral. its tapered wings were based on two spruce spars and ply covered around the leading edge with fabric elsewhere; the frise ailerons were constructed in the same way. the d.63 had no flaps but light alloy air brakes were mounted under the wings at 37% chord. the fixed fin and ground adjustable tailplane were ply covered, mounting fabric covered control surfaces. there was a trim tab in the port elevator.