Rolls-Royce Archives
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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 starter motor static torque data for various motor models.

Identifier  ExFiles\Box 64\2\  scan0219
Date  20th November 1928 guessed
  
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 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 S.45 | 5.900 | 3.700, 2.870 | 82 | ? | 55 | 198
C2 (2s2p) | 5.000 | 3.100, 2.750 | 82 | 3 1/4 | 35 | 126
R.{Sir Henry Royce} Bosch Post war | 4.920 | 2.750, 2.800 | 62 | — | 32 | 153.5
N | 5.000 | 3.100 to 3.000, 3.500 | 74 | EFC. 4 1/2 | 53.5 | 213.5
  
  


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