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).
Experiments to resolve piston knocking using an oil plunger scheme.
| Identifier | WestWitteringFiles\D\October1919\ Scan7 | |
| Date | 1st October 1919 | |
| Contd. -2- EH2/LGS.10.19. ************ The strongest springs would not prevent the piston knocking if we applied a load such as one would get when picking up from slow speed on a car. We feel that there are possibilities with this oil plunger scheme. The results so far are that we have been able to cure several knocks but on another piston which had more than the standard amount of clearance, we were not successful in curing the knock. We have some piston castings now which are suitable for making a permanent scheme of this oil pad. As soon as possible we shall get a complete set running on a car. EH. R R.{Sir Henry Royce} 235 A (100 V) (S F.{Mr Friese} 575, 16-4-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. | ||