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).
Technical sheet about overheating in 25 HP engines due to corroded passages, and the potential exacerbating effect of anti-freeze.
| Identifier | ExFiles\Box 151\3\ scan0155 | |
| Date | 9th November 1931 | |
| 81435. To Hd.{Mr Hayward/Mr Huddy} Frou Depot Sheet. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} OVERHEATING - 25 HP. We have come across the case of a 25HP. overheating at low engine speeds, which was traced to the passage between the front & rear halves of the cylinder block becoming choked with corroded products such as rust etc. It has occurred to us that such a state of affairs might be accentuated by using anti-freezing mixture which is likely to accelerate the detaching of oxidised particles from the water jackets. In the event of persistent overheating, therefore, it is as well to remove the plates from the cylinder block and ensure that this trouble is not present, more especially when an anti-freezing solution has been used. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||