Travel Air 4000
The D-4000 had split axle type landing gear with rubber cord shock absorbers. The wings were all wood spars and ribs, fabric covered. The fuselage, tail surfaces and rudder were welded steel tube, fabric covered. The ailerons were aerodynamically balanced and of wood and metal construction.
Engine: Wright J-5 Whirlwind, 225 hp
Cruise: 110 mph