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).
Graph of volt-excitation curves for a starter motor with narrow brushes.
| Identifier | ExFiles\Box 34\3\ Scan131 | |
| Date | 1st January 1917 guessed | |
| VOLT - EXCITATION CURVES WITH NARROW BRUSHES STARTER MOTOR ARMATURE VOLTS 0 1 2 3 4 5 6 7 8 9 STARTER MOTOR EXCITING CURRENT (AMPERES) 0 10 20 30 40 50 60 70 80 90 100 24 SLOT 45 SLOT 17 SLOT A | ||