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).
Design of pistons, specifically scraper rings and piston pin size and fit.
| Identifier | ExFiles\Box 66\1\ scan0042 | |
| Date | 31th March 1925 | |
| To E.{Mr Elliott - Chief Engineer} & RG.{Mr Rowledge} from R.{Sir Henry Royce} c. to CJ. DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to hs.{Lord Ernest Hives - Chair} +80240 S E C R E T. EAC. AND INDIA. RE. PISTONS. X.8040 X.5040 I think we ought to add no more weight than we are forced to do. My all-scraper ring scheme does not look that it would do any harm if stopped where rings, are slip but thoroughly prove that it is worth the trouble: it ought to keep uniform. I do not like smaller pins, is this idea any good :- ? Ought not the pin to fit the reamed hole all the way so that they are less liable to break off at the root? That was one idea of the larger pin. The difference in size of the opening at the joint is nothing compared with wear. Do you consider the pin with plugged ends a success if put in with piston heated? E.{Mr Elliott - Chief Engineer} | ||