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 flow test results at various engine speeds, comparing performance with and without a thermostat.
| Identifier | ExFiles\Box 78\1\ scan0051 | |
| Date | 21th April 1920 | |
| X.3563 21.4.20. X.3764. 4.EX Car. X.3563. ------ ------- ------ Thermostat taken out - bypass blocked up. Revs. ins. of mercury. Galls of Water. 500 5/16" 8.0 1000 7/8" 12.0 1500 1 3/4" 17.8 2000' 2 15/16" 22.5 Thermostat in circuit. Valve closed - venturi between top water pipe and pump - bypass. 500 1/8" 3.5 1000 7/16" 9.5 1500 3/4" 12.0 2000 1 5/16" 16.0 R.R. 235 A (100 T/S.E. 846. 6-8-19) GL.{G. Linnett} 2460. | ||