Aerotechnik

HW100 - 45000
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Aerotechnik WGM.21

WGM.21
Role - Quadrotor helicopter
National origin - Germany
Manufacturer - Aerotechnik
Introduction - 1969

The Aerotechnik WGM.21 is a quadrotor helicopter that was developed in the 1970s.
Design and development
The WGM.21 is an open cockpit quadrotor. Four rotors are mounted at the end of a four tubular supports arranged into a X shape. Cyclic and collective controls are mixed into a single control yoke. Pitch is controlled by foot pedals. A second model, the WGM.22, was developed with side-by-side configuration seating and an enclosed cockpit.

Variants

WGM.21
Single seat prototype
WGM.22
Two seat enclosed version

Aircraft on display
Hubschraubermuseum Bückeburg - prototype

Specifications (WGM.21)
Data from Air Progress

General characteristics
Crew: 1
Empty weight: 90 kg (198 lb)
Gross weight: 335 kg (739 lb)
Powerplant: 1 × BMW 700 Automotive conversion, 40 kW (54 hp)
Main rotor area: 21.3 m2 (229 sq ft)
Performance
Maximum speed: 125 km/h (78 mph, 67 kn)
Cruise speed: 115 km/h (71 mph, 62 kn)
Service ceiling: 2,100 m (6,900 ft)