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 lap speeds, oil and engine conditions, tyre changes, and proposed modifications.
| Identifier | ExFiles\Box 160\3\ scan0097 | |
| Date | 24th January 1939 guessed | |
| ( 2 ) Suction operation would compensate the late timing of this governor for part throttle economy and relieve the driver. The tyres were then changed to Dunlop Racing 6.50 x 16" at 45 lbs/sq". Best lap speed 173.791 K.P.H. 107.98 M.P.H. Maximum oil pressure 43 lbs/sq" 3,750 Max. r.p.m. Maximum oil temperature 128°c Rocker cover removed for inspection of rocker and timing gear lubrication. No sign of oil feed. Extra spring removed from relief valve and pressure as standard 28 lbs/sq". Oil feed to rocker shaft now O.K. Lap speed checked again 173.791 K.P.H. at oil temperature 130°c 107.96 M.P.H. The oil temperature rose very quickly to 130°c. Proposed vent be cut in front of bottom cowling. ------------- Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe} | ||