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).
Challenges with the Spectre model's cooling system, including limitations imposed by the hydraulic pump on the fan and radiator.
| Identifier | ExFiles\Box 94\5\ scan0002 | |
| Date | 15th October 1935 | |
| To E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} 4324 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}12/KW.15.10.35. SpectreCodename for Phantom III Cooling. We understand that the pump for the new hydraulic jacking system on the SpectreCodename for Phantom III will definitely limit the width of the fan blade and also prevent us bringing the radiator any further back than at present. The present position is that we have a small amount of increased cooling which we can get with the existing size by using the Marston Mark VI matrix. It is doubtful, however, whether this will be adequate for all conditions, particularly with bonnets having shutters, since the Mark V matrix proved inadequate with a louvred bonnet. This being so, we shall probably have to increase the depth of the radiator. With regard to fans, we have now got a very good and silent fan, which is the one brought back from America. We cannot use this fan with the new position of hydraulic pump. We do not know whether we can make a narrow fan efficient, but if the pump remains where it is we shall have to start a new series of investigations. We raise this point because as things are at present it looks as if a lot of our work on the cooling system will have to be done over again. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||