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).
Water temperature test results for a Spectre with and without thermostat valves fitted at 60 and 80 MPH.
| Identifier | ExFiles\Box 91\4\ scan0161 | |
| Date | 28th July 1935 | |
| 3.S.I. SPECTRECodename for Phantom III. 28.7.35 WATER TEMPERATURE TEST. Radiator with Wut-Away Grille ON Thermostats Valves Taken Out. Speed 60 MPH. Miles. Air. Oil. Water. Gear Box 0 I9 86 80 88 1 I9 88 79 88 2 I9 87 75 86 3 I9 86 7I 85 4 I9 86 70 84 5 I9 86 70 84 6 I8 86 80 86 7 I8 88 76 86 8 I8 88 7I 85 9 I8 86 68 85 10 I8 86 67 84 11 I8 86 67 84 Average Temperatures 18.5 86.5 72.8 85.4 Thermostats Valves Fitted. Miles. Air. Oil. Water. Gear Box 0 I8 97 80 87 1 I8 93 76 85 2 I8 9I 7I 85 3 I8 90 70 85 4 I8 89 69 84 5 I8 87 68 84 6 I8 9I 80 86 7 I8 90 76 85 8 I8 88 7I 84 9 I8 87 68 84 10 I8 86 67 84 11 I8 86 67 84 I8 89.6 7I.9 84.7 Thermostats Valves Taken Out. Speed 80 MPH. Miles. Air. Oil. Water. Gear Box 0 I9 94 80 80 1 I9 93 82 80 2 I9 95 80 8I 3 I9 96 8I 82 4 I9 98 82 83 5 I9 I00 8I 84 6 I9 99 80 85 7 I9 98 83 86 8 I9 I00 83 85 9 I9 IOI 8I 87 10 I9 I02 79 88 11 I9 I04 8I 88 Average Temperatures. I9 98.3 8I 84 Thermostats Valves Fitted. Miles. Air. Oil. Water. Gear Box 0 I8 82 80 75 1 I8 87 80 76 2 I8 92 78 78 3 I8 94 79 79 4 I8 95 78 80 5 I8 96 77 80 6 I8 93 80 80 7 I8 92 77 8I 8 I8 94 76 82 9 I8 95 77 83 10 I8 96 78 83 11 I8 96 78 82 I8 92.6 78.I 79.9 B F | ||