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).
The manufacturing accuracy of flexible fabric couplings for a Magneto drive.
| Identifier | ExFiles\Box 76\2\ scan0119 | |
| Date | 11th June 1920 | |
| EH. from BY.{R.W. Bailey - Chief Engineer} RFC (Handwritten and crossed out) EP.{G. Eric Platford - Chief Quality Engineer} COPY. X2462 (Handwritten) BY3/F11.6.20. X.3530 CHASSIS - MAGNETO DRIVE. X 2462 (Handwritten) Referring to the question of the probable adoption on an early date of a flexible drive for the Magneto, I have been discussing this question at some length with Messrs. Hardy & Company, who manufacture the fabric. They point that we have had under discussion being the question of the accuracy with which the flexible couplings can be manufactured and drilled so as to ensure the couplings running fairly true. The nett result of the discussion is summed up in the fact that in their last letter Messrs. Hardy actually say - "We beg to advise you that in a flexible material such as ours we could not guarantee any such accuracy as you suggest. We do not believe any flexible material could be deemed accurate." I judge from their remarks that they do not consider the fabric can be kept within a nearer figure than .025" eccentric, which would mean .050" on an Indicator. I have written further on the matter and will let you have their reply later. BY.{R.W. Bailey - Chief Engineer} (Stamp) EFC JUN 11 RECEIVED | ||