This is the Dumas Dehavilland DH89 Kit 42.
Includes: All balsa, lightweight colored (gray) tissue covering two 2 (50.8mm) lightweight foam main wheels, CA hinges, rigging wire, control cables, instruction manual, three full-size plan sheets, acetate sheets for windows, and all hardware to complete this kit
Note: Motors are hardwired and soldered to speed control
Wingspan: 42" (1066mm)
Center of Gravity (CG): 1 5/8" (41.2mm) aft of the upper wing leading edge at the root
Ailerons, Up and Down: 1/2" (12.7mm)
Elevator, Up and Down: 5/8" (15.9mm)
Rudder, Left and Right: 1" (25.4mm)