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).
Table of static torque data for various starter motors.
| Identifier | ExFiles\Box 61b\3\ scan0108 | |
| Date | 24th January 1929 guessed | |
| VS{J. Vickers}243 STARTER MOTOR STATIC TORQUE DATA. MOTOR. | Carcass dia. (") | Armature Dia. (") Length (") | No. of conductors. | No. of field turns per pole. | Torque for 120 amperes (lb-inches) | Corresponding Flux (kilolines). --- R.R. Std. | 6.000 | 3.600 2.250 | 90 | 8 1/2 | 70 | 231 C2 | 5.000 | 3.100 2.750 | 82 | 6 1/2 | 60 | 216 K.{Mr Kilner} | 5.000 | 3.100 to 2.900 2.750 | 90 | 6 1/2 | 51 | 164 R.{Sir Henry Royce} Bosch S.45 | 5.900 | 3.700 2.870 | 82 | ? | 55 | 198 C2 (s 24) | 5.000 | 3.100 2.750 | 82 | 3 1/4 | 35 | 126. EFC. | ||