 The tail and elevator surfaces measured approximately two feet by six feet and were set much farther out from the wings than a normal Curtiss.It was powered by a seven-cylinder Macomber rotary engine that reportedly weighed 250 pounds, generated 450 pounds of thrust, and produced 60 hp to turn an eight-foot propeller.According to at least one source, Walsh added "silver dust" to the unbleached muslin of the flying surfaces.