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).
List of finally fixed quantities and specifications for a new experimental standard EAC Dynamo.
| Identifier | ExFiles\Box 60\1\ Scan011 | |
| Date | 7th December 1926 | |
| X 7660. 7.12.26. X.8660. EAC. DYNAMO - QUANTITIES FINALLY FIXED FOR NEW EXPERIMENTAL STANDARD. Brush widths :- Main .280" Control .187" Field winding (19- SWG) Air gap. .022" Main brush position angle 8° Control brush position angle 124° EFC↓ | ||