Fastest speed in a helicopter (FAI-approved)

According to Official Guinness Records,

The official FAI speed record for helicopters is 400.87 km/h (249.09 mph) and was set by John Trevor Eggington with co-pilot Derek J Clews, over Glastonbury, Somerset, England on 11 August 1986 in a Westland Lynx demonstrator.

For a complete list of 1986 records, please visit 1986 Guinness Records in United Kingdom.

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