Top 10 High Speed Helicopters
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Helicopters are not very good at flying at high speeds, due to issues like retreating blade stall and an upward pointing rotor system thrust vector.
It should therefore not come as a surprise that the more airplane-like designs dominate the list of the top three fastest VTOL machines.
The first class of fastest machines are the tiltrotors, followed by the hybrid helicopters that are equipped with one or two propellers.
Finally, come the conventional helicopters. Also remarkable is the Lockheed Cheynene, with its high speed and its somewhat controversial development history.