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).
Radiator silting and water loss in Phantom II cars, recommending a change to the red warning light's operating temperature.
| Identifier | ExFiles\Box 15\1\ Scan177 | |
| Date | 7th December 1929 | |
| X7250 To Ev.{Ivan Evernden - coachwork} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to Sales. Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}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 ll loses more water than the Phantom l 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 10° rise in temperature and additionally to prevent loss of water by boiling, that the red light should operate at 90° 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 ll is better than its predecessors. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||