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).
Friction losses in a slow-speed plate servo.
| Identifier | WestWitteringFiles\L\Jan1924-March1924\ Scan122 | |
| Date | 29th March 1924 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. X9900 (handwritten 4910) REF: Hs{Lord Ernest Hives - Chair}/ACL/29.3.24. FRICTION LOSSES IN WW. SLOW SPEED PLATE SERVO. Tests were made on this servo to estimate the proportion of friction. As was suggested, the gain was taken with gradually increasing and decreasing pedal loads between 30 and 150 lbs. on the pedal. The following results were obtained :- | Equivalent pedal press: lbs. | Torque output for - Applied torque | |---|---| | | Increasing loads. | Decreasing loads. | | 29.2 | 1.90 | 3.39 | | 53.5 | 1.81 | 2.49 | | 78 | 1.74 | 2.08 | | 102.2 | 1.66 | 1.87 | | 127 | 1.58 | 1.68 | | 151.5 | 1.54 | 1.54 | Of the values given one unit is due to the applied torque. A test is being arranged to test the efficiency of the servo with pins placed at as large a radius as possible in place of the existing dogs. Hs{Lord Ernest Hives - Chair}/ACL. | ||