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).
Replacement parts for an increased valve lift experiment on a 20/25 HP chassis.
| Identifier | ExFiles\Box 103\4\ scan0080 | |
| Date | 1st July 1931 | |
| Do. into. c. HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 85050 BY/CSL/EH.1.7.31. Re 20/25 HP. Chassis - Cylinder - Section 5050. Valves & Fittings - Sec:5060. Increased Valve Lift - Standard 20 HP. Please receive herewith marked up blueprints of the following drawings:- Sec: 5050. E.56891 Pedestal Studs replaces E.54406. Sec: 5060. E.56892 Push Rod replaces E.54534. E.56893 Valve - Inlet " E.55335. E.56894 " - Exhaust " E.53158. E.56895 Rocker Arm - R.H. " E.54159. E.56896 " " - L.H. " E.54160. E.56897 Rocker Shaft " E.54494. E.56898 Rocker Shaft Pedestal (Front) replaces E.52961. E.56899 " " " (Inter) " E.52963. E.56900 " " " (Central) " E.52962. E.56901 " " " (Rear) " E.55042. The above are as requested by Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} in memo: Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}5/KT.23.6.31. We may mention, that it may be found not necessary to manufacture new Push Rods to obtain the increased length, as this .050 could be taken up by the tappet adjusting screws. This completes instructions for this experiment. BY/CS. RECEIVED | ||