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).
Results of a freeze test on four cylinders.
| Identifier | ExFiles\Box 57\1\ Scan287 | |
| Date | 21th January 1927 | |
| x5770 To Rg. {Mr Rowledge} from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} Hs {Lord Ernest Hives - Chair} /Rml/LG21.1.27 x3994 With reference to Rg {Mr Rowledge} 5/LW7.1.27. We have tested 4 cylinders - 3 of which were filled 6" from the bottom and frozen solid twice, and 1 completely filled and frozen solid. In no case was there a subsequent water leak nor did the jackets appear to have suffered in any way during the test. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||