Log of engine temperature readings taken at one-minute intervals during a road test.
| Identifier | ExFiles\Box 31\4\ Scan232 | |
| Date | 11th October 1932 guessed | |
| (Test 1). Thermometer placed under bonnet on O.S. of engine between the two S.U. carburetters. Also a second thermometer fitted into the top water pipe from the cylinder head to the radiator. Average road speed 31.4 m.p.h. Time. Water Temp oC. Air Temp oC Under bonnet. Atmos. Temp oC. 1 Min. 27 16 10 2 " 26 17 10 3 " 30 17 10 4 " 34 18 10 5 " 40 20 10 6 " 46 22 9.5 7 " 54 25 9.5 8 " 60 28 9.5 9 " 65 30 10 10 " 70 32 10 11 " 74 34 10 12 " 73 36 10.5 13 " 69 34 10.5 14 " 67 35 10.5 15 " 68 36 10.5 16 " 70 38 10.5 17 " 71 39 10.5 18 " 69 39 11 19 " 70 39 11 20 " 69 39 11 21 " 68 39 11 | ||
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).