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).
List of specifications and modifications for engine unit No. 14.
| Identifier | ExFiles\Box 155\2\ scan0181 | |
| Date | 20th December 1937 | |
| -8- Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 1/JH.20.12.37 Solid rocker gear, camshaft E.88760 to suit. Not latest water passage 4 port head. E.88447 strengthened KE.965 exhaust valves. E.88782 solid stem inlet valves (S/SLV). Modified oil filler cap LeC.5451. A side valve springs Rm. {William Robotham - Chief Engineer} 260, B side EB.175. Suction oil filter gard LEC.5665. Std. type of bottom tappets, half a set with chromium plating, other half non plated (S/ZN) cloudburst hardened. face. Unit No.14. Unit dismantled in shop. Modified crankcase to suit 1 1/4 engine speed water pump and dynamo. 25/30 dynamo. W/M main bearings. Strengthened connecting rods LeC.5687. Forked rod bushes in Hall's metal .093, 3 in AC.6 and 3 in AC.2. Strengthened bearing halves, std. W/M dice for blade rod bearings. Rm. {William Robotham - Chief Engineer} 160 cylinder heads 6.5 : 1 C.R. adapted to suit solid rocker gear. Solid stems inlet valves E.88782 S/SLV. Strengthened EX. valves E.88447 KE.965. A.1 - 6 valve springs Rs. {Sir Henry Royce's Secretary} 540 marked red. 7 - 12 valve springs Rs. {Sir Henry Royce's Secretary} 540 marked blue. B.1 - 6 valve springs EB.3256 marked red. 7 - 12 valve springs EB.3256 marked red. | ||