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 different axle, brake, wheel, and spring configurations.
| Identifier | ExFiles\Box 3\2\ 02-page049 | |
| Date | 15th January 1914 guessed | |
| Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}13/L12114. Sheet. 2 ordinary side springs used. 484 lbs. Lanchester worm axle single brakes, R.W. wire wheels 895 X 135 with tyres. Grasshopper 468 " springs used. Delaunay-Belleville rear axle, single brakes, plain wood wheels 935 X 135 with tyres. Ordinary side springs used. 602 " Peerless rear axle with double rear brakes on single drums, with wood wheels and devisable rims fitted with 38" X 5½" tyres. Ordinary side springs are used. 625 " | ||