The company worked with Sopwith, Short, De Havilland, and Vickers. From 1947, the company specialized in production of licensed USA helicopters. In 1961, the company changed its name to Westland Helicopters Ltd. and specialized in building helicopters. The fuselage is narrow with a teardrop canopy and a tall, narrow tail fin. Narrow-chord wings are unswept and are set high and very far forward.
Tailplane is rounded.
Landing gear with tail wheel is retractable. A more powerful engine is housed in the starboard nacelle, while a less powerful engine with cabin supercharger is housed in the port nacelle. The reason for the development was that British were expecting large numbers of high-altitude German bombers over Great Britain. The fuselage is rectangular with rounded edges and a large, glazed cockpit. Long and narrow tail boom extends from the fuselage.