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).
Blueprint showing the cross-section of a copper bar for a starter motor.
| Identifier | ExFiles\Box 62\1\ scan0308 | |
| Date | 8th April 1935 guessed | |
| EL122 .205" .155" .020" RAD SECTION. SCALE 4/1 COPPER BAR. STARTER MOTOR | ||