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).
Letter from Ferodo Limited regarding the supply and testing of various clutch materials.
| Identifier | ExFiles\Box 26\4\ Scan093 | |
| Date | 6th May 1920 | |
| R.R. .235a (100 T) (S. G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 643. 19-2-20) G 2618 c o p y. FERODO LIMITED. SOVEREIGN MILLS, CHAPEL-EN-LE-FRITH. MAY. 6th, 1920. Thursday. HF{H. W. Frost - Coachwork Inspector}/LD. --- Messrs Rolls Royce Limited, Nightingale Road, DERBY. Dear Sirs, Confirming the writer's visit, and thanking you for your courtesy, we confirm arranging to supply you with some of our latest No.9 material, the name of which will be GM. It is unwoven asbestos, and exactly similar to what we shewed you had been under test here. We are also adding to the order, sufficient quantity of Aluminium rivets to suit your segments, in case you wish to try the combination. We were pleased to hear you are keeping to the Plate Clutch idea, and we would like to say positively that it would be impossible to get good results without carbonisation, in transmitting any power with our cotton material, through discs. We have never known a cotton liner burn out on a Cone Clutch. The reasons for the difference must be perfectly well known to your goodselves. We mentioned that we are making researches with a view to providing plates with raised bosses, to guard against thrust, and the holding action of the cement which we propose using to stick them down; and perhaps you would like us to begin experiments. If so, we await your drawing. We would like to refer again to the quality of material in question, and would be glad if you would keep before you the fact that three months or more, would certainly add 25% to the quality, so far as it affects durability and frictional value, of our ordinary standard material., and we should like to know if you could see your way to keeping a | ||