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).
Test results for a Bentley at Brooklands, detailing speed, temperature and pressure data.
| Identifier | ExFiles\Box 168a\4\ img047 | |
| Date | 8th November 1937 | |
| 6144 RM{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}11/MH.{M. Huckerby}8.11.37 6-B-IV. BENTLEY. Tests on Brooklands. 29.10.37. Figures were obtained on the following:- (1) Maximum and lap speeds. (2) Water temperatures with Thermostat control of water flow. (3) Oil temperatures and pressures using Duckham's N.P.3. (4) Accuracy of A.C. speedometer and rev. counter. Speedo Reading M.P.H. | Rev.counter Reading. R.P.M. | Timed Lap Speed. M.P.H. | Oil Temp. °C. | Oil Pressure Lbs/Sq.In. | Water Temperatures Rear of Block. | Top Water Pipe. --- | --- | --- | --- | --- | --- | --- 60 | 2700 | 60.37 | 82 | 30 | 78 | 76 80 | 3700 | 80.26 | 110 | 26 | 78 | 77 90-86 | { 4100 } { 3900 } | 88.46 (mean of 3 laps) | 130 | 22 | 80 | 79 Fastest lap recorded 88.78 m.p.h. Fastest ½ mile recorded 92.78 m.p.h. Mean of five ½ miles 90.45 m.p.h. Oil pressure with engine idling at 500 R.P.M. at 130°C was 4 lbs/sq.in. Air temperature was 14°C during the tests. confirmed | ||