The Westland Wisp was an unmanned coaxial helicopter developed by Westland Helicopters it was powered by a pair of 5hp twin cylinder two-stroke engine.
The Westland Wisp was an unmanned coaxial helicopter developed by Westland Helicopters it was powered by a pair of 5hp twin cylinder two-stroke engine. (en)
The Westland Wisp was an unmanned coaxial helicopter developed by Westland Helicopters it was powered by a pair of 5hp twin cylinder two-stroke engine. (en)