Blueprint chart showing the representative performance curve of a J Machine Dynamo.
| Identifier | ExFiles\Box 68\4\ scan0109 | |
| Date | 13th September 1928 guessed | |
| 40/50 AMPERE OUTPUT OPERATING VOLTAGES HIGHER-OUTPUT ARMATURE REPRESENTATIVE OUTPUT CURVE OF STANDARD PHANTOM NB DYNAMO AT 80°C (δ=121°) SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR 40/50 HP DYNAMO REPRESENTATIVE PERFORMANCE CURVE OF J MACHINE WITH HIGHER-OUTPUT ARMATURE No.1 B. 8.5° C 127.5° DYNAMO R.P.M CHASSIS M.P.H WITH 15/52 AXLE & 33.5" TYRE DIA. | ||
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).