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).
Testing of different piston pin designs to eliminate engine knock on a 40/50 HP chassis.
| Identifier | ExFiles\Box 48\1\ Scan120 | |
| Date | 18th September 1920 | |
| X 4190 To Da.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} Copy to CJ. " " Bn.{W.O. Bentley / Mr Barrington} " " Hs.{Lord Ernest Hives - Chair} " " EFC. " " By.{R.W. Bailey - Chief Engineer} E1/G18.9.20. X.4190. RE PISTON PINS. - 40/50 H.P. CHASSIS.X.2748 Referring to the question of eliminating the elusive piston pin knock we send you herewith drawing No. LeC. 1283 shewing pins fixed in the connecting rod, and pins free in both connecting rod and piston, as promised during your last visit to West WitteringHenry Royce's home town. Mr. Royce wishes me to say that the immediate object of the test is to determine whether this treatment of the pin is of any value rather than to test out the designs shewn on LeC.1283, so that for the purpose of the test it is only necessary to use one each of the methods shewn of plugging up the pin ends. If the moving pin, or full floating pin proves to be a success, then it will be necessarynto find out which of the schemes shewn on LeC.1283, is the best for standardisation. E.{Mr Elliott - Chief Engineer} | ||