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Vintage RC Helicopters - Du-Bro Helicopters
David Greys prototype based on the 'free flight'
contra-rotating helicopter configuration was developed and manufactured in 1972
thus becoming the first US Radio-controlled helicopter kit; the Whirlybird 505. Below is a list of introduction dates for Du-Bro helicopters and 'major' upgrades; I have not included minor kit variations, change of body colours etc.
Du-Bro also produced a training set with extended landing legs with 'wiffle' ball as they called them which allowed the helicopter to slide in any direction and prevented it from being 'tipped' over. Additionally, one of the main problems with learning to hover was the control of the tail, especially with collective pitch which did not have the tendency for torque correction that a fixed pitch system displayed. To counter this an extension to the tail boom was also supplied which had a very large circular auxiliary fin; in a breeze this tended to act as an early 'heading hold' gyro which stopped the helicopter rotating. Top of Page (VRHC - Vintage Radio controlled HeliCopters) |
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