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).
Instruction to set the radiator steam valve for the 35-EX car.
| Identifier | ExFiles\Box 92\3\ scan0329 | |
| Date | 13th July 1937 | |
| To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Std. 300a Rm{William Robotham - Chief Engineer}/Std.11/AP.13.7.37 35-EX. RADIATOR. Will you please ensure that the radiator steam valve on the radiator for this car is correctly set i.e. blows at 2½ lbs /sq.in. approx. Rm{William Robotham - Chief Engineer}/Std. | ||