INSIGHTS FAIREY ROTODYNE
The Rotodyne could operate in two basic modes. Relying on its rotor for control and, with engine power providing thrust for forward flight, it was a pure helicopter, but with no direct drive to the rotor and forward thrust provided by the propellers, it was an autogyro.
The take-off sequence was initiated by starting the engines and engaging their auxiliary compressors to enable air to flow to the tip-jets. The rotor was then allowed to accelerate to the normal light-up speed of 100rpm. With fuel cocks and ignition selected on, light-up generally took five to 10 seconds to achieve. With the tip-jets burning the rotor could then be accelerated to flight speed of 140rpm.
“ It achieved forward flight like a helicopter, with the tip-jets powering the rotor which was controlled through the collective and cyclic”