(July 27, 2017 at 12:37 pm)c172 Wrote: Supersonic Helicopter?
Poor choppers.... they're far from ever reaching supersonic speeds...
"A very well-known fastest helicopter, the Eurocopter X3 is the fastest in the world. It is an experimental high-speed compound helicopter produced by the Eurocopter, now the Airbus Helicopters. It has a maximum speed of 472km/h"
"Supersonic travel is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343 m/s, 1,125 ft/s, 768 mph, 667 knots, or 1,235 km/h."