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 comparison list for parts of a 4x6 engine against standard parts.
| Identifier | ExFiles\Box 3\3\ 03-page023 | |
| Date | 18th October 1911 | |
| x200/I Oct. 18th 1911. AWA/3281011. Mr Nadin. 18.10.11. Herewith are the weights of parts of 4 x 6 Engine compared with standard. 4 x 6 Standard. Crankshaft. 89 lbs. 83 1/2 lbs. Camshaft. 18 lbs. 12 1/2 oz. 11 lbs. 3 oz. Crankcase. T.H. 80 lbs. 71 1/2 lbs. Crankcase. L.H. and wheelcase. 50 1/2 lbs. 44 1/2 lbs. Cylinders. 125 lbs each. 96 1/2 lbs. Piston. 3 lb. 13 1/2 oz. 4 lbs. | ||