From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Maximum speed test results for vehicle 14.B.V. at Brooklands, detailing various tyre and exhaust configurations.
| Identifier | ExFiles\Box 97\3\ scan0176 | |
| Date | 3rd July 1939 | |
| To Rm.{William Robotham - Chief Engineer} RM{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}3/JH.3.7.39. 14.B.V. at Brooklands - 26.6.39. (1) Max. speeds. Type of tyre. Tyre pressures hot. Lap speed. Best speed for 1 mile. Front. Rear. All tyres 6.50 x 16. (India.) 32 39 96.5 99.45 (Dunlop Track racing.) 43 47 107 109.5 } runs made in Overdrive. (Ditto with fan removed.) 109 111.1 Vertical Text: Twin Exhaust System. (Avon Heavy tread.) 31 33 96.9 97.3 (Avon Medium tread.) 31 33 97 98.1 (Avon light tread.) 31 33 97 98.1 (Avon light tread) 40 45 101.7 102.8 Overdrive & direct. Vertical Text: Standard B.V. Exhaust System. (Avon light tread.) 40 45 99 - Overdrive. (Avon heavy on rear - light on front.) 40 45 100.3 - Direct. 98.6 98.9 Overdrive. (Ditton.) 100.2 100.5 Direct. | ||