The Unbuilt Helicopter Projects of Hans Berger

[hesham]

Hi,

from Wikipedia;

Berger-Helicopter - Wikipedia

en.wikipedia.org

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.

 

[Hammer Birchgrove]

Why the heck can't I make a link that takes you directly to the article? ???

 

[Maveric]

the Berger BX-110

 

[hesham]

Thank you my dear Maveric,

and here is the Berger BX-50 single seat helicopter,and
BX-111 project.

http://www.heli-archive.ch/index.php?id=85&L=1

 

[Grey Havoc]

I suppose you could alternatively classify the BX-50 as an 'ultra-light' helicopter.

 

[Jemiba]

From "Der Flieger", March 1964, the BK-300 3-seat turbine helicopter and
an amphibian helicopter project without designation:

 

[hesham]

Excellent my dear Jemiba,


and the last one is new for me.

 

[Jemiba]

... and in From "Der Flieger", December 1964, there was a 3-view of the BK-300:

 

[hesham]

Hi,

I add a two pictures to reply # 3,please note the different between two BX-111 drawings.

 

[hesham]

From JAWA 1985.

 

[hesham]

From two weeks,

I saw a drawing or Info about Berger BX-112 in this forum,but where ?.

 

[Bazinga]

And a 1985 patent for a compound helicopter (BX-111) turning into a gyro at >150 km/h. https://patentimages.storage.googleapis.com/d1/cf/c0/bbd7f8cd446a07/CH666664A5.pdf

 

[Bazinga]

https://www.ogs-seebach.ch/p/infoseld.php?id=4843
This article mentions a BX-2 and a jet powered kids cart