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).
The parts list for a 3 3/4 inch diameter piston assembly under a rationalised programme.
| Identifier | ExFiles\Box 148\1\ scan0306 | |
| Date | 8th January 1941 | |
| To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/HH. c. to Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Piston 1256 Rm{William Robotham - Chief Engineer}/HH.5/SW.8.1.41. 3 3/4 Dia. Piston - Sec.5040. The following details have been produced in accordance with the rationalised programme :- RE.1824 Piston. RE.2053 Piston Ring No.1 RE.2054 Piston Ring No.2 RE.2055 Scraper Ring. RE.2056 Gudgeon Pin. RE.2057 L.O.P. Piston. This completes the instructions for the section above, with the assumption that we may fit these pistons in a 6 cyl. crankcase. Rm{William Robotham - Chief Engineer}/HH. Mells | ||