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).
Potential causes for B.HP engine trouble at Siddeley-Deasy, referencing cooling issues.
| Identifier | WestWitteringFiles\A\November1917\ Scan10 | |
| Date | 26th November 1917 | |
| EH. from R.{Sir Henry Royce} c. to Oy. c. to BJ. ORIGINAL. R3/W26.11.17. 1917 RECEIVED X. 2884 Re - B.H.P. at Siddeley-Deasy. Thank you for your memo with reference to B.H.P. at Siddeley-Deasy. It would seem that the trouble arose through one of three causes, either steam pockets(as you suggest) preventing the necessary cooling, or the valve seats are somewhat insulated from the aluminium and therefore do not carry off the heat so quickly as direct water cooled metal, or else the valves or seats become distorted and so blow past. I presume, however, that this is not a question of running with weak mixtures or bad distribution, such as you would notice straight away. Your own experience would suggest that it was the water circulation that was at fault. R.{Sir Henry Royce} | ||