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).
List of proposed and ongoing modifications to address engine overheating issues.
| Identifier | ExFiles\Box 94\3\ scan0208 | |
| Date | 7th June 1937 | |
| -3- (b) We are going into the question of altering the thermometer scale with the makers, so that the instrument reads 100°C. when steam is about to escape i.e. 105°C. (c) We are testing out removal of the calorstat spring which will reduce the running temperature by 7°C. approximately and so increase the time to reach 100°C. when idling. (d) We will recommend an alternative fan to be fitted in cases of repeated complaint. (e) On future and if necessary existing cars we suggest a new position for the thermometer pocket - on the front of A.side head where there is already a suitable pocket - we shall endeavour to get this fitted up on the next 15,000 miles car - this will avoid reading a higher temperature on the dash thermometer than actually exists in the radiator. (f) An improved fan and drive is running on the next 15,000 miles Ph.III. car. (g) We will carry out tests with an improved waterflow at low speeds, but do not anticipate much gain as the temperature drop across the radiator when idling is only 5 - 6°C. at present. (h) A modified cylinder head has been requested from the design Dept. dispensing with the water-jacketting of the exhaust ports - this will materially reduce the heat to the cooling water and help us with any overheating complaints. Rm{William Robotham - Chief Engineer}/Std. | ||