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).
Instruction regarding the speedometer drive ratio calibration for India 1V cars.
| Identifier | ExFiles\Box 50\4\ Scan222 | |
| Date | 25th October 1928 | |
| X9308 To BY {R.W. Bailey - Chief Engineer} /CGH. {W Clough} from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} Hs {Lord Ernest Hives - Chair} /Rm {William Robotham - Chief Engineer} 2/LG25.10.28. X5310 INDIA 1V - SPEEDOMETERS. BY {R.W. Bailey - Chief Engineer} /CGH {W Clough} 4/N24.10.28. We are asking the A.T. to calibrate their speedometers at 776 revs. Will you therefore instruct this speedometer drive ratio in the gearbox on these cars. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||