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).
Diagram of an E.A.C. Servo with three graphs showing its mechanical gain performance under varying conditions.
| Identifier | ExFiles\Box 30\6\ Scan160 | |
| Date | 18th November 1924 | |
| E.A.C. SERVO Diagram Text: TANGENTIAL PULL P MECH GAIN P/W LOAD W Graph A: Title: VARIATION IN MECH GAIN WITH TEMPERATURE X-Axis: TIME RUN. MINS. Y-Axis: MECHANICAL GAIN Conditions: W = 10.5 LBS, DRUM SPEED 500 R.P.M Graph B: Title: VARIATION IN MECH GAIN WITH SPEED X-Axis 1: DRUM REVS/MIN X-Axis 2: EQUIVALENT ROAD SPEED M.P.H Y-Axis: MECHANICAL GAIN Conditions: W = 10.5 LBS., TEMP DRUM = 100°C Graph C: Title: VARIATION IN MECH GAIN WITH LOAD X-Axis: LOAD W IN LBS WT. Y-Axis: MECHANICAL GAIN Conditions: DRUM SPEED 500 R.P.M, DRUM TEMP 100°C. Initials: W.A.R. | ||