Back Bell coaxial-rotor helicopter
1945

Bell Coaxial

A little-known fourth research helicopter was also constructed. Used to evaluate the coaxial configuration employed successfully by Breguet in France and Hiller in California, a single-seat prototype with two counterrotating rotors on a common shaft briefly took flight. "With a torque corrected by a torque, it was much more precise in hover than a tail-rotor machine," said Young, the only one to fly it. "It was just like standing on the floor; you could move it an inch or a half inch or whatever you wanted".

The coaxial helicopter was set aside a couple of days into testing when the transmission gears were found to be badly gouged. Although he had learned what he needed from this unusual prototype, Young was later distressed to find that it had been unceremoniously taken away and junked.

J.P.Spencer "Whirlybirds: A History of the U.S. Helicopter Pioneers", 1998

Comments 
polo, e-mail, 13.06.2011

I guess the word "JUNKED" didn't convey the status of the "project" clearly enough.

Anthony k ambei, e-mail, 16.05.2011

It,s better technology an little known to kenya-nairobi.i would like to get basics on home made model helicopters.from design.GOD BLESS

George Mandellos, e-mail, 21.10.2010

Dear Sir

Me interest helicopter coaxial system and wait from you eny information for this.

Thank You
Georges Mandellos

Doc Willingham, e-mail, 28.11.2009

Too many helicopters have been left on the "junk heap" of flying machines. No "boom and zoom", no fame.

Lester, e-mail, 27.09.2009

I guess the word "JUNKED" didn't convey the status of the "project" clearly enough.

kiran, e-mail, 20.04.2009

will u send me model sketch of your project let me know something about your project please

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