Rotorcraft World RecordsArchived 2013-12-03 at the Wayback Machine. Fédération Aéronautique Internationale (FAI). Note search under E-1 Helicopters and "Speed over a straight 15/25 km course".
Rotorcraft World RecordsArchived 2013-12-03 at the Wayback Machine. Fédération Aéronautique Internationale (FAI). Note search under E-1 Helicopters and "Speed over a straight 15/25 km course".