Absolute World Speed Record for helicopters achieved (modified Westland Lynx AH.1 'G-LYNX')
Monday, August 11, 1986 - Somerset Levels, Glastonbury, United Kingdom
The modifed Westland Lynx AH.1 (registration G-LYNX) achieved the absolute speed record for a rotorcraft (216 kts/400.87 km/hr), piloted by Westland Chief Test Pilot Trevor Egginton with Derek Clews, Flight Test Engineer. The record course covered 15km from East Huntspill to Hartlake Bridge in Somerset, England - see FAI Record Category E-Absolute (Absolute Record for class E - Record ID 11659). A summary of the background to the record attempt is provided in an article in the Sep-Oct 2016 issue of Vertiflite, and "Putting the Record Straight" by D. Gibbings.
Ref: The Aerodynamics of the Helicopter World Speed Record, F. J. Perry, Westland Helicopters Ltd., Presented at the 43rd Annual National Forum of the American Helicopter Society, May 1987
The aircraft is now on display at the The Helicopter Museum in the United Kingdom.
See also the following resource for more information about helicopter speed records,
"Helicopter Speed Records", AHS Staff, AHS web page, last accessed 14 Aug 2017