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).
Comparing the cooling systems of various cars.
Identifier | ExFiles\Box 24\4\ Scan108 | |
Date | 12th July 1923 | |
R.R. 493A (40 H) (SL 42 12-7-23). J.H. D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. Expl. No. 1751 REF: Hs{Lord Ernest Hives - Chair}3/LGS.10.23. COMPARISON OF CAR COOLING SYSTEMS. We have obtained by actual measurement details of the cooling systems of well-known makes of car and compared them with those of the R-R models. It is apparent that the 40/50 Radiator is much deeper than the average which works out at something under 4". It is very deficient in face area, however. Another fact that will be noticed is that while the 40/50 makes excellent provision for getting air through the radiator with a large fan, (6 blades seem abnormal) the prospects of the air getting out of the bonnet are not good as the engine is undersheeted and the bonnet shutters are small. It will be observed from the accompanying table, the most popular type of matrix is the zig-zag ribbon. Apart from financial reasons this might be explained by the fact that this type of radiator core gives a greater surface per unit volume than the air tube, and hence better cooling at low speeds (see Lockwoods' article - S.A.E.Journal Jan.1923). A point of interest which has been noted is that the Hispano has two inlet pipes at the top of its large radiator presumably to ensure that there is no stagnant portion of the matrix. OUTSIDE DIA 1 3/16" 10" APART. 2" BELOW RAD. TOP | ||