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 brake efficiency test results for a 17-slot starter motor.
| Identifier | ExFiles\Box 34\3\ Scan148 | |
| Date | 12th April 1918 | |
| E.A.C. R.R. STARTER MOTOR BRAKE EFFICIENCY TEST. X 2692 (17 SLOT ARMATURE). Y-AXES: ELECTRICAL H.P., EFFICIENCY, VOLTAGE, AMPERES, B.H.P., R.P.M. X-AXIS: TORQUE (POUND INCHES). GRAPH LABELS: EFFICIENCY, B.H.P., ELECTRICAL H.P., R.P.M., AMPERES, VOLTAGE. STAMP: ROLLS-ROYCE LIMITED, DERBY, 12 APR 1918. | ||