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).
Anti-spill radiator cap valve, comparing it to a 'Camel' type and suggesting its use for the Spectre or Wraith models.
| Identifier | ExFiles\Box 149a\3\ scan0143 | |
| Date | 31th December 1934 | |
| 23678? To E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}20/KW.31.12.34: Anti-Spill Radiator Cap Valve. Attached is a report from Steadman on our own anti-spill radiator cap valve compared with the "Camel" type of valve. I think if we are designing any valves of this type for the SpectreCodename for Phantom III or Wraith, they should be of the "Camel" seat loading. GWH.{George W. Hancock - Head Chateauroux} carried out a test on a 20/25 with the actual Camel valves which we hand to you, and though he boiled the car furiously, did not get trouble from excessive back pressure. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}: | ||