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 on the gearbox and rear axle temperatures of a Phantom III at sustained maximum speed.
| Identifier | ExFiles\Box 91\2\ scan0206 | |
| Date | 2nd August 1937 | |
| CHATEAUROUX. 300a To. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} c. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} 32-EX. PHANTOM III Gearbox & Rear Axle Temperatures. As requested in Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}21/AP.15.7.37, we have carried out a test to find the ultimate temperature reached with sustained maximum speed. The air temperature was 15°c. Negretti thermo-meters were used and the following temperatures recorded during a run at maximum speed up and down an eighteen mile straight road. Distance Covered Gearbox Rear Axle Miles. Temp. °c Temp. °c 20 88 95 40 116 110 60 126 123 68 132 127 The temperatures then settled down and no further rise took place. These are quite exceptional conditions and would never be approached in service. The maximum temperatures on a full speed point to point run are 120°c --------- Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||