Test report detailing performance metrics and modifications from test runs 6 to 10.
| Identifier | ExFiles\Box 160\3\ scan0170 | |
| Date | 1st September 1940 guessed | |
| ( 2 ) 6th Test. As 5 but LM.4 needles. Best lap speed 175.069 KPH. Oil temp. 124°c 108.8 MPH. Water " 90°c 7 laps completed. 7th Test. Repetition of 5th. Tyre pressures altered by Dunlop Representative. Fronts. 5.50 x 18 to 3 kgs. Rears. 5.50 x 19 to 3.3 kgs. Best lap speed 174.404 KPH. Oil temp 115°c 108.423 MPH. 7 laps completed. 8th Test. As 5 but with air taken from a point just in front and side of radiator. Thermostat valve drilled to lower water temperature. 2 holes 5 m {Mr Moon / Mr Moore} /m in diameter. Best lap speed 175.069 KPH. Oil temp 115°c 108.8 MPH. Water " 75°c 9 laps completed. 9th Test. As before but with exhaust standard. No cut-out. Best lap speed 172.437 KPH. 107.19 MPH. 7 laps completed. 10th Test. Air silencer fitted with cold air taken in front of radiator. LM.8 needles and out-cut plate off. Best lap speed 173.088 KPH. Oil temp. 110/112°c 107.5 MPH. Water " 75/80°c 7 laps completed. Track conditions... Dry Wind.............. 4 meters per sec. Barometer......... 759 Air temperature ... 6.5°c Summary of Tests. Air scoops and ventilation made no apparent difference to oil temperature. There is a marked difference now in the time taken to reach a maximum than originally with this unit. | ||
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).