Berger-Helicopter

Hans Berger, a noted Swiss inventor, formed Berger-Helicopter, to develop a series of light helicopters of his own design. The BX-50 of 1961 and the BX-110 of 1974 were built as prototypes, with the BX-110 proving sound enough to earn a certificate of airworthiness from the Swiss Board of Aviation. Besides these two machines, Berger's other inventions were a jet-powered car, and numerous other helicopter designs. Professionally, Berger was the sales representative for Brantly in Switzerland and Liechtenstein.

Unbuilt Berger helicopter projects

Berger HB-25 - 4 seat design with turbine power
Berger BX-50
Berger BX-110
Berger BX-111 - 2 seat design with Wankel-type engine and coaxial rotors
Berger BX-200 - 2 seat design with turbine power
Berger BX-300 - 3 seat design with stub wings, to be powered by Turboméca turbine

References

Gunston, Bill (1993). World Encyclopedia of Aircraft Manufacturers. Annapolis: Naval Institute Press. p. 45.
Aero Revue (March 1964)
Der Flieger (March 1964)
Cockpit (December 1989)

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