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).
Test results for thermostat operating temperatures and vehicle acceleration.
| Identifier | ExFiles\Box 39\4\ Scan192 | |
| Date | 12th November 1930 guessed | |
| THERMOSTAT 25-EX. Starts to Open 50°. Fully Open 61°. Starts to Close 58°. Fully Closed 48°. G.H.Whyman 21.10.30. ACCELERATION TESTS ON 19-EX. 5.11.30. Water temperature 60°. Speed, MPH. time, secs. 10 - 20. ........... 5.16. 20 - 30. ........... 5.00.. 30 - 40. ........... 5.05. 40 - 50. ........... 5.95. average taken both ways. Water temperature 70°. Speed, MPH. Time, secs. 10 - 20. ........... 4.95. 20 - 30. ........... 4.45. 30 - 40.. ........... 4.95. 40 - 50. ........... 5.90. average taken both ways F, Dodd. | ||