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).
Potential fault with a piston ring pin in Lord Portarlington's car, number 2107.
| Identifier | ExFiles\Box 16\1\ Scan124 | |
| Date | 2nd April 1913 | |
| From F.H.R. Copies sent to: Mr. Johnson, Mr. Wormald, Mr. Platford, Mr. Nadin. Re Lord Portarlington's car, 2107. If this fault is due to a loose piston ring pin it may be that the ring is tight in the groove as this is the only way that I can see that the pin has any stress imposed upon it. A piston, however, is likely to seize through many causes the most likely ones being failure of lubrication and cooling water. If we did not subject our pistons to such a rigorous dynamometer tests such failures, would, in all probability, be much more frequent than they are. The piston rings are of the double ring type which has been used for many years without trouble. The matter should be watched, at the same time we are fitting, I understand, a different scheme for the Austrian Trials cars using the scheme that I have suggested of manufacturing the outer ring with a solid portion in place of the inser-ted pin. This entails some unusual and rather expensive machine work and I believe that if it can be carried out successfully that it will make a first-class job and certainly prevent any risk of the recurrence of this fault. I hope that between Mr. Platford and Fleck a conclu-sion will be arrived at which will settle as to whether it was due to a loose piston ring pin or any other cause. F.H.R. W. Wormald | ||