In spite of its checkered past, this aircraft, in model form, is a true performer. The model's long nose, simple, light fuselage structure, generous stab and large wings make this model truly a biplane wakefield.
The C/G should be set 2-1/16" from the leading edge of the top of the wing.
Scale: .75 = 12"
Weight: 136 grams (4.7 oz.)
Wing Loading: .53 gm/sq. in.
Wing Span: 32"
Plane Length: 23.5"
Wing Area: 254 in.
Designed as the logical replacement for the DH-4, The DH-9 never completely lived up to its anticipated billing. The DH-9's airframe was simpler, quicker to build, and apparently would have improved performance over the DH-4. However, never ending engine problems plagued this aircraft until the wars end. Even the designer, Jeoffrey De Havilland, writing to the Air Board warned that the performance of the DH-9 would be inferior to that of the DH-4. The biggest issue was the aircraft's lack of power to carry a bomb load at more than 15000' altitude. None of the engines chosen that would fit the airframe were reliable and/or predictable enough to provide the needed horsepower. Regrettably the Air Board locked in production on the DH-9 not withstanding.
This model was designed to be flown as Rubber free flight, Electric Free Flight or Electric R/C. Irrespective of power and type chosen, this model is constructed in the same manner. All laser cut parts included for either choice.
