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).
Circuit diagram showing the arrangement of apparatus and connections for a starter motor test.
| Identifier | ExFiles\Box 168a\2\ img034 | |
| Date | 20th March 1931 guessed | |
| -38- SUPPLY + A S₂ V + - EMS S₁ Os ARRANGEMENT OF APPARATUS & CONNECTIONS FOR STARTER MOTOR TEST | ||