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).
Weight schedule for clutch and valve operating mechanism components.
| Identifier | ExFiles\Box 132\2\ scan0132 | |
| Date | 2nd March 1941 guessed | |
| - 7 - Section Ref. No. No. off Weight lbs. ozs. 1. L. - CLUTCH. Borg & Beck clutch pressure plate & springs 7" dia. 1 1 6 10 Friction plate. 2 1 1 13 Trunnion clutch. 3 1 - 12¾ operating arm - clutch. 4 1 - 12 Total section weight. 9 15¾ 1. M.{Mr Moon / Mr Moore} - VALVES AND OPERATING MECHANISM. Camshaft. Retaining plate. Sprocket - timing chain. 1 1) 1) 1) 7 3 Cam followers (inlet & exhaust). 2 8 - 12 Push rods. 3 8 1 7 Valves - exhaust. 4 4 - 9¼ Valves - inlet. 5 4 - 9¼ Valve springs. 6 8 1 4½ Bottom washers - springs. Grummots. 7 8) 8) - 4 Top washers - springs. Valve wedges. 8 8) 16) - 4½ Rocker shaft. 9 1 - 5½ Rockers. Tappets. Bush. 10 4) 4) 4) 1 - Rocker pedestal. 11 2 - 8 Springs - spacing. Spring clip. 12 3) 2) - ¾ Complete rocker assembly as above. 13 1 1 13½ Camshaft driving chain. 14 1 - 12½ Total section weight. 17 ½ | ||