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).
Detailed weight analysis table of engine components broken down by material composition.
| Identifier | ExFiles\Box 132\2\ scan0136 | |
| Date | 18th May 1941 guessed | |
| SECTION. | % of Eng. | Total Wt. of Sec. | ALUMINIUM lbs. | % of Sec. | % of Eng. | BRASS & BRONZE lbs. | % of Sec. | % of Eng. | STEEL lbs. | % of Sec. | % of Eng. | MAGNESIUM lbs. | % of Sec. | % of Eng. | OTHERS. lbs. | % of Sec. | % of Eng. 4000 Crankcase & Brgs. | 15.4 | 383.5840 | 242.3779 | 63.3 | 22.8 | 9.6998 | 2.5 | 13.7 | 130.9211 | 34.1 | 10.9 | .5573 | .1 | 15.8 | .0279 | Neg. | Neg. 4010 Crankshaft | 5.4 | 134.9861 | .4687 | .3 | Neg. | | | | 134.5174 | 99.7 | 11.2 | | | | | | 4020 Pistons | 3.3 | 81.9343 | 57.0000 | 69.6 | 5.3 | | | | 24.9343 | 30.4 | 2.1 | | | | | | 4030 Conn: rods | 4.2 | 105.0811 | | | | 5.6468 | 5.4 | 8.0 | 99.4343 | 94.6 | 8.3 | | | | | | 4040 Valves & Fittings | 2.2 | 54.6970 | | | | | | | 54.3845 | 99.4 | 4.5 | | | | .3125 | .6 | .2 4050 Cylinders | 21.9 | 546.4514 | 339.3261 | 62.1 | 31.9 | 19.1209 | 3.5 | 27.1 | 178.9903 | 32.8 | 4.9 | | | | 9.0141 | 1.6 | 5.9 4070 Wheelcase & Ftgs. | 2.9 | 72.1012 | 59.8718 | 83.0 | 5.6 | .7724 | 1.1 | 1.1 | 9.2468 | 12.8 | .8 | | | | 2.2102 | 3.1 | 1.5 4071 Aux.Gr.{George Ratcliffe}Ex.Fuel P.D. | .4 | 9.7785 | 3.2766 | 33.5 | .3 | | | | 6.4988 | 66.5 | .5 | | | | .0031 | Neg. | Neg. 4072 Coolant Pump Drs. | .1 | 3.1337 | .4880 | 15.6 | Neg. | .1694 | 5.4 | .2 | 2.4707 | 78.8 | .2 | | | | .0056 | .2 | Neg. 4073 Oil Pump Drive | .2 | 4.1460 | | | | | | | 4.1460 | 100.0 | .3 | | | | | | 4090 Camshaft drive | 1.2 | 30.5000 | 11.8701 | 38.9 | 1.1 | | | | 18.5924 | 61.0 | 1.5 | | | | .0375 | .1 | Neg. 4100 St.Motor Drive | .6 | 14.2469 | 2.6153 | 18.4 | .2 | .4057 | 2.8 | .6 | 11.2124 | 18.7 | .9 | | | | .0135 | .1 | Neg. 4101 Engaging Mechm. | .5 | 12.0386 | .1000 | .8 | Neg. | .0500 | .4 | .1 | 11.8886 | 98.8 | 1.0 | | | | | | 4110 Coolant Pump | .6 | 14.5760 | 8.8784 | 60.9 | .8 | 3.2308 | 22.2 | 4.6 | 2.0896 | 14.3 | .2 | | | | .3772 | 2.6 | .2 4130 Oil Pump main | 1.0 | 24.6760 | 11.6161 | 47.1 | 1.1 | 1.8521 | 7.5 | 2.6 | 11.1632 | 45.2 | .9 | | | | .0446 | .2 | Neg. 4131 Oil Pump Aux. | .2 | 6.1315 | 4.0635 | 66.2 | .4 | .3225 | 5.3 | .5 | 1.7455 | 28.5 | .1 | | | | | | 4160 Mag.dr.& ftgs. | 1.9 | 48.2773 | 1.4688 | 3.1 | .1 | .2920 | .6 | .4 | 5.5165 | 11.4 | .5 | | | | 41.0000 | 84.9 | 27.0 4161 Auto time devise | .4 | 10.6270 | 4.5133 | 42.5 | .4 | .2105 | 2.0 | .3 | 5.8411 | 54.9 | .5 | .0500 | .5 | 1.4 | .0121 | .1 | Neg. 4170 Cam & Rock.Mechm. | 4.2 | 104.6254 | 24.1659 | 23.1 | 2.7 | 1.2368 | 1.2 | 1.7 | 79.2227 | 75.7 | 6.6 | | | | | | 4190 Tachometer drive | Neg. | .3380 | .1168 | 34.6 | Neg. | .0178 | 5.3 | Neg. | .2034 | 60.1 | Neg. | | | | | | 4240 Reduction gear | 14.8 | 369.8890 | 106.0903 | 28.7 | 10.0 | 3.4309 | .9 | 4.8 | 258.2384 | 69.9 | 21.4 | .1181 | Neg. | 3.4 | 2.0113 | .5 | 1.3 4250 Priming pipes | .2 | 3.9705 | .2574 | 6.4 | Neg. | 1.7703 | 44.6 | 2.5 | .2568 | 6.5 | Neg. | .0458 | 1.2 | 1.3 | 1.6402 | 41.3 | 1.1 4260 Induction pipes | 3.6 | 88.6163 | 63.8355 | 72.0 | 6.0 | 1.2818 | 1.5 | 1.8 | 5.1643 | 5.8 | .4 | | | | 18.3347 | 20.7 | 12.1 4270 Coolant conns: | 1.3 | 32.9945 | 10.7695 | 32.6 | 1.0 | 3.4575 | 10.5 | 4.9 | 17.6713 | 53.6 | 1.5 | | | | 1.0962 | 3.3 | .7 4280 Oil fittings | .4 | 9.8463 | .3460 | 3.5 | Neg. | .3548 | 3.6 | .5 | 9.0328 | 91.8 | .8 | | | | .1132 | 1.1 | .1 4290 Carburetter | 1.5 | 38.5000 | | | | | | | | | | | | | 38.5000 | 100.0 | 25.3 4300 Controls engine | .2 | 5.7455 | .6600 | 11.5 | .1 | .1830 | 3.2 | .3 | 4.4741 | 77.9 | .4 | | | | .4284 | 7.4 | .3 4302 Controls C.S.U. | .1 | 1.9942 | .5127 | 25.7 | Neg. | .0067 | .3 | Neg. | 1.4111 | 70.8 | .1 | | | | .0637 | 3.2 | Neg. 4330 Ign.wire Ftgs. | 2.0 | 49.0822 | .6179 | 1.3 | .1 | 8.9899 | 18.3 | 12.7 | 5.4267 | 11.0 | .5 | 2.7452 | 5.6 | 78.1 | 31.3025 | 63.8 | 20.6 4360 Fuel Pump | .3 | 6.2790 | 2.2306 | 35.6 | .2 | .9165 | 14.6 | 1.3 | 1.6162 | 25.7 | .1 | | | | 1.5157 | 24.1 | 1.0 4400 Supercharger | 4.3 | 107.3587 | 85.2737 | 79.4 | 8.0 | 2.4454 | 2.3 | 3.5 | 18.4392 | 17.2 | 1.5 | | | | 1.2004 | 1.1 | .8 4402 Op.Mechm.2-speed | .7 | 16.9041 | 4.7692 | 28.2 | .4 | 1.6206 | 9.6 | 2.3 | 10.4917 | 62.1 | .9 | | | | .0226 | .1 | Neg. 4410 Driving Gear & Sp.{Mr Spinney}D. | 3.5 | 88.3633 | 10.0992 | 11.4 | .9 | 1.3785 | 1.6 | 2.0 | 75.2840 | 85.2 | 6.2 | | | | 1.6016 | 1.8 | 1.1 4430 Auto Boost Contr. | .4 | 11.0983 | 5.9785 | 53.9 | .6 | 1.4531 | 13.1 | 2.1 | 2.4582 | 22.1 | .2 | | | | 1.2085 | 10.9 | .8 4470 Const. Sp.{Mr Spinney}Unit | .1 | 1.6611 | .4176 | 25.1 | Neg. | .2800 | 16.9 | .4 | .9610 | 57.8 | .1 | | | | .0025 | .2 | Neg. Total Wt.of Section. | 100% | 2494.2330 | 1064.0754 | 42.7 | 100% | 70.9565 | 2.8 | 100% | 1203.9449 | 48.3 | 100% | 3.5164 | .1 | 100% | 152.9998 | 6.1 | 100% | ||