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 breakdown of an S.S. Jaguar engine by component section.
| Identifier | ExFiles\Box 132\2\ scan0033 | |
| Date | 10th June 1938 | |
| 1115 also 1070. c. Files. c. Board. [This line is struck through in red] S.S.JAGUAR. 10th. June 1938 ENGINE WEIGHT. lbs. ozs. Section 1A Cyls. and Crankcase. 207 - " 1B Cylinder Head. 82 7½ " 1C.D. Crankshaft and Pistons. 106 5½ " 1E.F.G. Sump. Front engine Mt. 42 4 " 1H.I.J.K. Water Pump & Fan & Carbs. 59 11½ " 1L Borg & Beck Clutch. 21 12¾ " 1M Valves & Mech. 32 9¾ " 1N Engine Electrical System. 50 14¼ 603 1½ | ||