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).
Failure of heat-stressed piston rings in Bentley engines and their replacement.
| Identifier | ExFiles\Box 87\2\ scan0248 | |
| Date | 11th March 1937 | |
| 236. Hs.{Lord Ernest Hives - Chair} from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} S. By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer} Kingsbury. Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux}1/R.11.3.37. BENTLEY - PISTON RINGS. The Kingsbury Department has recently been receiving piston rings that are apparently heat stressed in place of the hammered stressed. They have been a failure with regard to oil consumption, and have necessitated the stripping down of the engine to fit other rings. A recent case was 400 M.P.G. with the heat stressed rings and 800 hammer stressed standard brico. The Depot has to-day received another supply of rings which are hammer stressed. Why are these different rings being supplied. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||