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).
Phantom's cooling system performance, potential modifications, and comparisons with competitor vehicles.
| Identifier | ExFiles\Box 29\3\ Scan218 | |
| Date | 1st July 1930 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. SG.{Arthur F. Sidgreaves - MD} WOr.{Arthur Wormald - General Works Manager} c. Ev.{Ivan Evernden - coachwork} S X788 R2/M1.7.30. X.788 X.766 X.3531. BROOKLANDS TESTS. PHANTOM COOLING. Referring to hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/MJ25.6.30. we should like to know how our cooling compares with that of other big cars, such as Hispano, Packard etc. We are very interested to know what happens to the Chrysler which is supposed to have such a light radiator and yet keep passably cool. It has occurred to me that we may have too long a length of tube for its dia. (cross sectional area). We shall not have modified this much in the more recent practice of reducing the size of tube and shortening it, but we may have always been using too long a radiator tube. Ev.{Ivan Evernden - coachwork} suggests that we make one experiment with the shutters entirely removed, and he points out that the American shutters may not obstruct the air so much, (supposing that shutters do obstruct the air). Regarding the petrol supply we shall shortly send you the design for a petrol pump for our car work. In this case the result will not be so involved as the pump will have to be made big enough to give the full supply to the engine at maximum engine revs. It would seem that the back axle ratio has not much influence on the water temperature, as the American car is low geared, but I should certainly like to know the effect of a higher geared car on Brooklands running, both as regards maximum speed and water temperature. R.{Sir Henry Royce} | ||