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).
The performance data of a Hispano servo, detailing the ratio of torque output to input.
| Identifier | WestWitteringFiles\L\2Jan1924-March1924\ Scan67 | |
| Date | 1st March 1924 | |
| R.R. 493 (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (RCJ) EE, (WOR{Arthur Wormald - General Works Manager}) By (E) Da{Bernard Day - Chassis Design} EE RHECROY. (RG{Mr Rowledge}) Expl. No. 4214 1559 REF. Hs{Lord Ernest Hives - Chair}/ACL1/LG11;3.24 OBJECT OF TEST. Data of Hispano servo. TESTER. A.{Mr Adams} C. Lovesey. CONDITIONS. Tests made with engine on test bench. SUMMARY OF TEST. Ratio of Torque Output to Torque Input. Experiments made over a range of loads equivalent to pedal pressures from 15 lbs. to 100 lbs. and an equivalent car speed of approx. 30 M.P.H. Torque output - In these results - Torque output = Torque given by servo + torque input. RESULTS :- | Ratio Torque output / Torque input | Value of μ from results. | |---|---| | Max. value reached. | 10 | .57 | | Min. value reached. | 3 | .28 | | Average value. | 4 | .36 | contd:- | ||