Weir W.3


This single-seater was powered by an inverted 4-cylinder in-line engine and fitted with a two-bladed 'auto-dynamic' rotor. It could make a 'jump take-off': to do this, the rotor was run at overspeed in flat pitch then suddenly given sufficient positive pitch to produce the jump while the engine was declutched. The W.3 was publicly displayed at Hounslow Heath on 23rd July 1936.

P.Lambermont "Helicopters and Autogyros of the World", 1958

Weir W.3

Technical data for W.3

Number of seats: 1, engine: 1 x Weir Pixie rated 50hp, rotor diameter: 5.66m, length: 4.37m, height: 2.16m, gross weight: 295kg