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 showing the results of a starter motor brake efficiency test for a 24 slot armature.
| Identifier | ExFiles\Box 34\3\ Scan152 | |
| Date | 24th May 1928 | |
| R.R. STARTER MOTOR BRAKE EFFICIENCY TEST x.2642. (24 SLOT ARMATURE.) ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES B.H.P. R.P.M. TORQUE (POUND INCHES) VOLTAGE EFFICIENCY B.H.P ELECTRICAL H.P. AMPERES R.P.M ROLLS-ROYCE LTD. 24 MAY 1928 DERBY. | ||