Hans Berger (aircraft manufacturer)

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Hans Berger was a Swiss inventor noted for the two successful helicopters that he designed and built by himself with no formal aeronautical training: the BX-50 of 1961 and the BX-110 of 1974. The latter design proved 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 helicopter projects included:

• Berger HB-25 - 4 seat design with turbine power
• 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

[edit] References

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

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