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).
Bench test results for a post-war R. Bosch starter motor.
| Identifier | ExFiles\Box 64\2\ scan0051 | |
| Date | 10th May 1927 | |
| 10.5.27. R.{Sir Henry Royce} BOSCH STARTER MOTOR (POST WAR) BENCH TEST. (1) Terminal 50 to + brush½ Amperes 29.0 Overall voltage 10.5 Voltage drop on solenoid coil 1.7 Voltage drop on auxiliary field coil 8.8 Current not including opposing coil = less than 1 ampere. (2) Terminal 50 to case. Current 27.0 amperes. Overall voltage = 10.5 Volt drop on solenoid coil 1.5 Volt drop on auxiliary field coil 8.2 Volt drop on armature = .8 (3) Armature held. Amperes 28.5. Overall volts 10.2 Solenoid 1.5 Auxiliary field 8.3 Volt drop across armature .4 EFC. | ||