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).
Methods for calculating spring plate thickness and ordering new sample sets for comparison.
| Identifier | ExFiles\Box 80\2\ scan0340 | |
| Date | 30th June 1920 | |
| R.R. 235A (100 T) (S. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 643, 19-2-20) G 2618 Contd. -2- Da{Bernard Day - Chassis Design}23/CB30.6.20. (5) We find that when we take actual thickness of the plates, the new way of calculating brings the spring to exactly the weight proved by experiment. The older method, which we formerly used, gave results considerably too low. (6) We find by calculation that provided the thickness of each leaf is constant, the leaves cannot react except at their ends, and at the central clip. This is independent of the relative thickness of the various plates. (7) In the meanwhile we have sample sets of springs on order, having a thick main plate and other leaves of a less, but constant, thickness and square ends, so that we may bump them by comparison with the pre-war springs. Da.{Bernard Day - Chassis Design} | ||