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 possible and probable weight reductions for Phantom III units.
| Identifier | ExFiles\Box 96\4\ scan0089 | |
| Date | 28th August 1936 | |
| X358 To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}1/JH. 28.8.36. Possible & Probable Weight Reductions on Phantom III Units. Possibles. Reduction. lbs. - ozs. (1) Cylinder Liners. Reduction in section from .151 to .125 ? 6 8 (2) Hall's Metal Bearings. Mains and liners in place of W/M.{Mr Moon / Mr Moore} on steel. 3 2 Strap Rods with Hall's bearings. 4 2 Reduced dia. crankpins &a 1 5 (3) Spring drive. (4) Flywheel & Clutch. Anticipated saving by using flexible flywheel 20 0 (5) Exhaust Manifolds (6) Deletion of oil indicator and tap, and substituting 25/30 2 12 (7) Deleting cross water passage. (8) 4 Port cylinder heads 7 0 ------ 44 13 ====== | ||