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).
Graph showing certified calibration curves for a starter motor fitted to a 16 HP car.
| Identifier | ExFiles\Box 145\1\ scan0133 | |
| Date | 3rd January 1935 guessed | |
| Motor Amps. Motor R.P.M. Battery and Starter Volts Motor Shaft Torque (LBS. FT.) Battery Volts Starter Volts R.P.M. Amps. CERTIFIED CALIBRATION CURVES of Starter Motor No. 35607 fitted to standard 16 H.P. Car used in Vacuum Oil Coys Tests. Torque readings measured through gear ratio 120/11 and do not include torque lost in gearing (Total ratio on car 69/11) Battery No 652 maintained at -0.5°C to 0°C : 1.315 S.G | ||