In 1944, Vincent Bendix (of washing machine fame) established Bendix Helicopters (later renamed Helicopters Inc.). The Bendix designer, Martin Jensen, devised the Bendix Model J single-seater which used a system of coaxial rotors and was driven by a 450hp Pratt & Whitney R-985 piston engine. This was followed by the Model K - with an enclosed tube and fabric fuselage but with a much smaller 100hp Continental C-100 engine. The Model K (NX41817) made its maiden flight in June 1945, but Bendix eventually ceased operations in 1949 without achieving certification.
R.Simpson "Airlife's Helicopter and Rotorcraft", 1998
|Ted Bohrer, e-mail, 08.07.2017|
I was a good friend of Martin Jensen and stayed with him in Long Beach in 1965 as we rebuilt the coax. I have some film of his 1940s machine flying
|евгенl, e-mail, 22.04.2017|
вот откуда у России вертолёты с соосной схемой
|shoes, e-mail, 14.06.2011|
The model J first flew in 1947 incorporating the lessons learned from the testing of the model K.
|George A. McCooubrey, e-mail, 31.12.2007|
The writer worked for Bendix Helicopters during the devlopment period of 1946 & 1947.Other Info Sources, like this one, usually confuse the planned 4-place production helo, the model J, with the development test single place model K, which was in fact the first Bendix Helo to fly. It was a fortunate decision, for the original control concept patented by Vincent Bendix required redesign. The model J first flew in 1947 incorporating the lessons learned from the testing of the model K.
|Brad Meerfeld, e-mail, 11.02.2007|
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