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 report detailing performance metrics such as speed, consumption, and temperatures during a track run.
| Identifier | ExFiles\Box 160\3\ scan0128 | |
| Date | 27th January 1939 guessed | |
| ( 2 ) Speedometer trip set at zero. 5 laps were completed before timing for the hour. Average speed for I hour 172 K.P.H. 107 M.P.H. Petrol consumption by gauge 45 litres. 12.25 m.p.g. approx. Oil temperature rose to 135°c maximum and then dropped to 130°c with pressure at 21 lbs/sq". Water temp. 63°c. 2 extra laps were completed at the finish of the hour at, 175.740 K.P.H. 109.21 M.P.H. Complete list of lap times attached to this report. Track Conditions. Air temperature 19°c (taken in the sun) Wind............ Nil Barometer........ 741 Humidity figure of 88 All speeds are actual without correction. Thermostat replaced in water system. 5.50 x 18" Dunlop wheels fitted at 45 lbs/sq" to rear. Best lap speed 174.404 K.P.H. 108.423 M.P.H. Maximum 3,700 r.p.m. Water temperature 85°c Oil temperature 110°c Track freezing, too dangerous to continue. ----------- Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe} | ||