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 comparing the weights of Phantom III unit components made from Aluminum versus Magnesium.
| Identifier | ExFiles\Box 142\4\ scan0023 | |
| Date | 17th June 1936 | |
| Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}2/KW.17.6.36. Phantom III Unit Weights. Total Unit Weight 856 lbs. (approx.) Alum. Magnesium. Lower Half (1) 26 lbs. 16½ lbs. Wheelcase (1) 5 lbs. 3⅛ lbs. Clutch Cover (1) 10½ lbs. 6⅝ lbs. Rocker Covers (2) 11 lbs. 7 lbs. Crankcase (1) 131½ lbs. 83 lbs. Filter Case (1) 3 lbs. 1⅞ lbs. Top Water Rails (2) 6 lbs. 3¾ lbs. Induction Pipes (4) 7 lbs. 4½ lbs. Cylinder Heads (2) 74 lbs. 46½ lbs. Cam Cover Plates (2) 2½ lbs. 1½ lbs. 276½ lbs. 174¼ lbs. Hot Spot Box I/C weighs 13 lbs. 4¾ lbs. 289½ lbs. 179 lbs. Brake Drums Dashboard Gearbox - Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||