 One of the airplanes produced by the company was the DGA-11, powered by a nine-cylinder Pratt & Whitney R-985 Wasp Junior radial engine, was purportedly the fastest four-seat civil aircraft of the late 1930s, able to achieve a top speed of about per hour.A favorite of the high society and Hollywood circles, the DGA-11 cost about $16,500 in 1938 — a princely sum for the time.A slower and less costly version, the DGA-12, used a Jacobs engine.