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 a full floating piston pin design to eliminate engine knock for the 40/50 HP chassis.
| Identifier | ExFiles\Box 35\2\ scan 236 | |
| Date | 18th September 1920 | |
| x2748 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} 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 necessary to find out which of the schemes shewn on LeC.1283, is the best for standardisation. E.{Mr Elliott - Chief Engineer} | ||