List of engine component specifications, part numbers, and clearances.
| Identifier | ExFiles\Box 155\2\ scan0176 | |
| Date | 20th December 1937 | |
| -3- Std. A.C.7 big end bearings and con. rods .00225 clearance on crankpins. Increased inertia damper to LeC. reduce to 25% above std. (Rm. {William Robotham - Chief Engineer} 131). 45° angle timing gears. Std. deturb. head, 6.4 : 1 C.R. Std.EB.2793 - S/SV. inlet valves. EB.2970 KE valves in No.2,3 and 6 (exhaust). EB.2794 Sil X (Stell in No.7, 10 & 11 (exhaust) Tempered spring Co.Rm. {William Robotham - Chief Engineer} 260 Swedish valve springs. A.C. bye-pass filter. Unchilled cyl. block 230 brinell. Aerolite pistons (Std) high pressure rings. Delco Remy ignition governor. B.19 (3.B.IV). Standard production crankcase. Up to date prod. crankshaft with 2 - .2187 holes in journal, and 2 - .125 holes in pins. Die cast AC.6 main bearings. Billet cast AC.6 big end bearings with single centre holes as production. Camshaft EB.3240 long toes as Phantom III. Rockers with W/M bores, replacing std. bronze bushes. Std. deturbulated cylinder head 6.3 : 1 C.R. Nos. 1 - 6 valve springs std. EB.175 S/CV. Nos. 7 - 12 " " Rm. {William Robotham - Chief Engineer} 260 Swedish. | ||
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).