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).
Comparative performance curve graph for different starting motors.
| Identifier | ExFiles\Box 61b\3\ scan0163 | |
| Date | 25th February 1924 | |
| STARTING MOTORS COMPARATIVE CURVES Y-AXIS: R.P.M TORQUE LBS FT VOLTS AT MOTOR TERMINALS X-AXIS: AMPS LEGEND: ----- DELCO 4 5/8" TYPE 185 - . - . - Bosch 5" --- . --- W'house 5 1/2" TYPE 7018 NOTES: WINDING FORM 7 Phila Mach No 9816R STALL 13.25 450 AMPS 2.7 VOLTS by FEB 25. 1924 | ||