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).
Proposed design for a 24-slot, 6-volt armature for 'S.S.', including dimensional drawings and wire gauge calculations.
| Identifier | ExFiles\Box 61\2\ scan0265 | |
| Date | 19th August 1919 guessed | |
| PROPOSED 24 SLOT 6 VOLT ARMATURE FOR S.S. .526" .462" .210" .242" .160" .115" 24 x 8 = 192 conductors. 24 Slots. 16 SWG Wire 24 x .160 = 3.84" Try 14 & 15 S.W.G. | ||