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).
Water boiling issues on 40/50 HP and 20 HP cars, comparing radiators and recommending shutters.
| Identifier | ExFiles\Box 77\4\ scan0344 | |
| Date | 1st February 1924 | |
| BJ. from Hs.{Lord Ernest Hives - Chair} C O P Y. [Handwritten]: Copy Hm.{Capt. W. Hallam - Head Repairs} E.P. [Handwritten, crossed out]: X4240 Hs{Lord Ernest Hives - Chair}3/LG4. 2. 24. RE. WATER BOILING ON 40/50 AND 20 HP. CARS. [Handwritten]: X766 R6/M10.8.23. Replying to your memo. BJ15/H16.1.24. We reported on the above in our memos. Hs{Lord Ernest Hives - Chair}3/LG5.10.23 and Hs{Lord Ernest Hives - Chair}2/LG6.9.23., the conclusions we arrived at after tests and making comparisons between 40/50 HP. and other makes of cars was that the radiator on the 40/50 HP. RR. is small. Since that time we are now fitting to the 40/50 HP. as standard, a radiator in which the matrix is 21.25" deep instead of 20.25". These radiators were standard from 'S' series. This larger radiator will undoubtedly be a definite improvement but we shall still have a small radiator compared with other cars. The radiator on the 20 HP. compares very favourably with the radiators on other cars. From tests we have made, we find the only way in which we could improve the 20 HP. would be to fit shutters to the bonnet. These, when open, will increase the cooling efficiency 5 to 6%. We have not heard of many complaints of 20 HP. cars boiling. We should recommend shutters are only fitted on cars for hot and hilly countries. Hs.{Lord Ernest Hives - Chair} | ||