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).
Report on anti-spill radiator cap valves, comparing an in-house design to the 'Camel' type.
| Identifier | ExFiles\Box 87\1\ scan0128 | |
| Date | 29th November 1934 | |
| To E.{Mr Elliott - Chief Engineer} x40 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/KW.29.11.34. Anti-Spill Radiator Cap Valve. Attached is a report from Steadman on our own anti-spill radiator valve compared with the "Camel" type of valve. I raised the point because in the U.S.A. with my thermostatically operated shutters working at about 85°C., I lost a certain amount of alcohol by evaporation, and this should not have happened if the valve had sealed the radiator properly. 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} | ||