Radio control helicopters had a rough start in early 1970. They were primitive vehicles compared to what is available today and controllability, just enough to float or ride slow forward flight. This helicopter is an example of the first commercially produced and successful in the United States, operating model, designed by Dave Gray Whirlybird 505 and produced by Du-Bro, a manufacturer of accessories for R / C model airplanes. There is no discussion with the tail rotor as you normally wouldfind in a modern R / C heli, the engine runs at the top of the main rotor and the fuel tank under the engine runs with no possibility to monitor the fuel level. When the engine is stopped, the helicopter descends, as if a string of support have been cut. The flight time is strictly limited to six minutes for security reasons. Many thanks to Joel Rosenzweig for recording this video!
Keywords: heli, radio, control, vintage, flight, rc, helicopter, du-bro, whirlybird
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