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).
Engine temperature test results under various bonnet shutter and ignition settings.
| Identifier | ExFiles\Box 24\5\ Scan302 | |
| Date | 18th July 1930 guessed | |
| -2- 5° Test with front bonnet shutters open, 70 M.P.H. Top water Temp. Bottom water Temp. Oil Temp. Air Temp. 87.5 80 90 19. 85 76 90 18.5 ) Note 80 71 90 18.5 ) result 79.5 72.5 88 18.5 ) of rain storm. 82.5 75.5 89 18. 85 78.5 89 18. 87 80 90 18. 87.5 80.5 90 18. 87.5 80 90 18. 6° Test with front and rear bonnet shutters open, 60 M.P.H. Top water Temp. Bottom water Temp. Oil Temp. Air Temp. 81 75 78 17.75 81 75 79 18 80.75 75 80 17.75 7° Test with front and rear bonnet shutters open, 70 M.P.H. Top water Temp. Bottom water Temp. Oil Temp. Air Temp. 87.5 80 87.5 18.25 87.5 80 89 18.5 87 80 90 18.5 8° Ignition retarded 3 notches, 70 M.P.H. temp. test. Top water Temp. Bottom water Temp. Oil Temp. Air Temp. 89.5 82.5 91.5 18.5 90 82.5 92 18.75 90 83 92 18.75 | ||