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).
Request to determine the wheel revolutions per mile for a 'Spectre' chassis with specific tyres for speedometer calibration.
| Identifier | ExFiles\Box 165\4\ img255 | |
| Date | 19th November 1934 | |
| 86065 Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} From Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.12/MA.19.11.34. SPECTRECodename for Phantom III SPEEDOMETER. Will you please arrange to roll the "SpectreCodename for Phantom III" chassis with 7" x 18" Dunlop Fort tyres inflated to 32 lbs/sq.in. pressure in order to obtain the wheel revs per mile. [Handwritten note:] EST Tyres inflated to 35LB" Rolling circumference 96" [Signature] Gudbyman [Stamp:] Hs{Lord Ernest Hives - Chair}/Wst 1100 | ||