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 sample generator output curves, plotting Amps and Volts against Speed.
| Identifier | ExFiles\Box 60\4\ Scan015 | |
| Date | 26th January 1931 | |
| SAMPLE GENERATOR OUTPUT CURVES SK 415 AMPS VOLTS SPEED + # 1048 ⊕ # 1047 □ # 1046 Jsh 1/26/31 EUGENE DIETZGEN CO., CHICAGO-NEW YORK NO. 346 EX 7500 RECEIVED JAN 26 1931 | ||