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).
Blueprints for modifying the 20/25 Dynamo to increase output.
| Identifier | ExFiles\Box 62\3\ scan0135 | |
| Date | 26th January 1931 | |
| X5661 EFC. By/RD17/N26.1.31. X.5661/3. Re. 20/25 Dynamo Output. We hand you herewith two blueprints of D.52129 shewing how the poles can be trailed to obtain more output. These should be attached to the curves for U.S.A. inaccordance with Hs{Lord Ernest Hives - Chair}5/MJ16.1.31 and Sg{Arthur F. Sidgreaves - MD}4/E19.1.31. By/RD. | ||