It was a development of the Nakajima Kotobuki and Wright Cyclone.

These proved a failure, and before completion, the third was converted to use a 9 cylinder 575 hp (429 kW) Wright Cyclone, being completed as the YP-20.

The aircraft was powered by either a Wright Cyclone or Pratt and Whitney Hornet engine.

An Aircruiser with a 850 hp Wright Cyclone engine.

It used 589 kW (790 hp) Wright Cyclones.

The B-5A was a Keystone B-3A with Wright Cyclone rather than Pratt & Whitney engines.

Early 14's used the Pratt & Whitney Hornet engine; later the Wright Cyclone was offered as an option.

It was a Douglas light Bomber powered by twin-engined Wright Cyclones.

At the same time, an order was placed for 25 B-4As, the same aircraft but mounting Pratt & Whitney engines instead of Wright Cyclones.

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