450 hp P&W Wasp
Photo dated Dec 6, 1931
Information from Vern C. Gorst, Pioneer and Granddad of Uniter Air Lines by Wilbur H. Gorst
... my father Vern Gorst took delivery of a Boeing Flying Boat B-1D. The first Boeing boat to have an enclosed cabin (five passengers and pilot). One month later he took it back to the factory to be modified by extending the forward section of the hull, 18 inches, which made it a B-1E....
