The Hamilton H-45 and H-47 were six-passenger-seat, all-metal, high-wing monoplanes powered by single Pratt & Whitney radial engines.

The Hamilton Metalplane Company, which merged with Boeing in 1926, built some of the earliest all-metal US aircraft.

The main legs of the fixed, tailwheel undercarriage were attached at the same wing points as the struts and joined laterally by inverted V bracing.

The two crew members sat in a cabin in front of the wings, accessed by a rooftop hatch.

Northwest Airways flew at least nine aircraft, introducing them on their Chicago-Minneapolis/St Paul route CAM 9 from September 1928.

[6] During 1930, Isthmian Airways used Hamilton floatplanes for their service linking the Atlantic to the Pacific between respectively Cristóbal, Colón and Balboa in the Panama Canal Zone.

H-47 Special 525 hp (390 kW) Wright Cyclone powered, span extended to 60 ft 5 in (18.4 m).