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 for the S.I. Spectre at 80 MPH, comparing results with thermostat valves fitted versus removed.
| Identifier | ExFiles\Box 91\4\ scan0162 | |
| Date | 29th July 1935 | |
| 3. S. I. SPECTRECodename for Phantom III. 29.7.35 WATER TEMPERATURE TEST. Radiator With Cut-Away Grille OFF. Thermostats Valves Taken Out. Speed 80 MPH. Thermostats Valves Fitted. Left Table: Miles. Air. Oil. Water. Gear Box. 0 23 84 80 72 1 23 87 80 75 2 23 90 79 76 3 23 92 79 77 4 23 94 81 78 5 23 96 81 79 6 23 96 80 79 7 23 97 82 82 8 23 99 82 82 9 23 100 81 84 10 23 102 82 84 11 23 103 82 84 Right Table: Miles. Air. Oil. Water. Gear Box. 0 22 90 80 78 1 22 93 78 79 2 22 95 79 80 3 22 96 79 80 4 22 97 80 81 5 22 99 80 82 6 22 95 80 82 7 22 94 79 83 8 22 96 80 84 9 22 97 80 85 10 22 98 81 85 11 22 99 80 86 Average Temperatures. 23 95 80.7 79.4 22 95.7 79.6 82 | ||