Back Hiller J-5
1946

Hiller J-5

To counteract torque this two-bladed-rotor experimental helicopter used not a conventional tail rotor but a jet thrust system. The latter consisted of a fan blower placed just behind the engine with a 'stove pipe' tail forward. Air was thus forced under pressure through the hollow fuselage into a tail orifice where vanes directed the jet thrust laterally.

Main rotor torque was effectively overcome, but this torque compensation system's power requirements proved markedly excessive at speeds greater than 64km/h.

P.Lambermont "Helicopters and Autogyros of the World", 1958

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Single-seat experimental helicopter with open frame front mounting pilot and engine and metal cone tail with jet thrust duct. One built.

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

Comments 
polo, e-mail, 13.06.2011

NOTAR...in!

deaftom, e-mail, 13.04.2011

NOTAR...in 1946!

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