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).
Specification sheet for a Royce D.C. 6-Pole Motor.
| Identifier | ExFiles\Box 76\2\ scan0099 | |
| Date | 21th August 1928 | |
| X632 21.8.28. ROYCE D.C. 6-POLE MOTOR. Field excitation 1.50 amperes Armature voltage 83 Speed 600 r.p.m. At 100 armature volts with same excitation, speed would be 750 r.p.m. and at 230 volts about 1200 r.p.m. . Speed cannot be increased much by weakening field on load as armature current becomes excessive. EFC. | ||