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).
Results of acceleration and hill climbing tests for an improved 25 HP car.
| Identifier | Morton\M13.2\ img083 | |
| Date | 19th August 1931 | |
| ORIGINAL To R.{Sir Henry Royce} From Ha/Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} .E. c. to By.{R.W. Bailey - Chief Engineer} Ha/Rm.{William Robotham - Chief Engineer}9/MJ.19.8.31. x577° y5771 IMPROVED PERFORMANCE 25 HP. With a view to confirming the low speed performance of the car on which the recent higher speeds were obtained on Brooklands, we have carried out some acceleration and hill climbing tests the results of which are attached. It will be observed that up to 50 M.P.H. the performance of this car, with its light body, is almost equal to that of a standard P.11, in fact is slightly better with the low depression carburetter. On our two standard test hills a marked improvement in performance is obtained over the standard unit and silencer fitted in the same car. We are repeating these figures with a 12 x 50 - axle, as it may be considered desirable to use such a ratio to save the power unit and would almost certainly be preferred with a silent higher easy change third, as on the new gearbox. Ha/Rm.{William Robotham - Chief Engineer} | ||