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).
Recommending a change to the red warning lamp operation on the Phantom II to prevent water loss from boiling.
| Identifier | ExFiles\Box 27a\3\ Scan098 | |
| Date | 7th December 1929 | |
| X4516. To Ev.{Ivan Evernden - coachwork} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Sales. HS{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}5/MJ.7.12.29. x4516 x7250. We have recently come to the conclusion that radiator silting up is aggravated if the car is run with the top row of tubes above water level. We are of the opinion that this allows the suspended products of corrosions to form a cement. We have therefore been going into the question of expansion and find that the Phantom 11 loses more water than the Phantom 1 owing to the decrease in width and increase in depth of the radiator. Additionally, when the red lamp lights at present, even if the shutters are immediately opened, a considerable amount of water is lost by incipient boiling. We recommend to prevent the loss of the final 10º rise in temperature and additionally to prevent loss of water by boiling, that the red light should operate at 90º as originally arranged. We do not think that this will annoy the owner when hill climbing as it might have done on previous cars as the Phantom 11 is better than its predecessors. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||