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 between different wheel, hub, and axle configurations.
| Identifier | ExFiles\Box 84\4\ scan0396 | |
| Date | 10th August 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}1/MH.{M. Huckerby}10.8.38. In considering these weights the weight of the wheels, front hubs and wheel nuts should be taken into account. They are as follows :- Semi-Float. Full-Float M.{Mr Moon / Mr Moore} Difference. lbs. ozs. lbs. ozs. lbs. ozs. 16" wire wheels if fitted to 106 4 Fully-float. 5 off. 16" Pressed wheels fitted to 112 12 -6 8 semi-float, with 4 centre discs) Wheel nuts 2 12 7 2 4 6 Front hubs 12 12 15 8 2 12 The Foregoing Differences Account for 10 In the above weights the front hubs, wheels and wheel nuts are taken into consideration, so a direct comparison can be made between the pressed steel 16" wheel, and the 16" wire wheel. There is a saving of 10 ozs. on the former which makes the increase in car weight occasioned by the use of the semi-float axle 23 lbs. 14 1/2 ozs. Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester} | ||