Land-speed landmarks - first to exceed 400 mi/h on one leg of two-leg run

According to Official Guinness Records,

John Cobb (UK), driving Railton Mobil Special (internal combustion engine), achieved a speed of 394.194 mi/h in Bonneville, Utah, USA, on 16 September 1947.
The Railton Mobil Special achived 385 mi/h in the first run and 403 mi/h in the second, averaging 394.194 mi/h.

For a complete list of 1947 records, please visit 1947 Guinness Records in United States.

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