Partially covering radiators during autumn to maintain an economical engine temperature.
| Identifier | ExFiles\Box 78\1\ scan0276 | |
| Date | 20th October 1919 | |
| X.3653 To RJ. from R. {Sir Henry Royce} Copy to CJ. " " EN. " " PN. {Mr Northey} " " HN. {F. C. Honeyman - Retail orders} " " EP. {G. Eric Platford - Chief Quality Engineer} " " EH. " " HM. {Capt. W. Hallam - Head Repairs} R5/G20.10.19. X.3456. X.3653. Dear RJ., RE RADIATORS. It is a very opportune time of the year to warn users of R.R. cars that as the radiators are large enough for Tropical climates and not summer time, it is advisable at this autumn time to see that part of the radiator is covered to enable the engine to maintain itself at an economical temperature of about 70/80°C. We do not consider it will be found to much to block off the upper half of the radiator by a plate inside next to the fan, when it will be found that the engine will run more economically and smoothly. Do not confuse this with anxiety about freezing of the circulating water! This must be cured for later, and is only dangerous while the enigne is not running. Signed F.H.R. Chief Engineer. Yours, R. {Sir Henry Royce} | ||
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).