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 | WestWitteringFiles\T\November1928\ Scan042 | |
| Date | 20th November 1928 guessed | |
| STARTER MOTOR STATIC TORQUE DATA. MOTOR. | Carcass dia. (") | Armature Dia. (") | Armature Length (") | No. of conductors. | No. of field turns per pole. | Torque for 120 amperes (ln-inches) | Corresponding flux. (kilolines). R.R. Std. | 6.000 | 3.600 | 2.250 | 90 | 8 3/4 | 70 | 231 G2 | 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 3.45 | 5.900 | 3.700 | 2.870 | 82 | ? | 55 | 198 C2 (2s 2p) | 5.000 | 3.100 | 2.750 | 82 | 3 1/4 | 35 | 126 EFC. | ||