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).
Replacement of fabric couplings with serrated ones to improve design and save weight.
| Identifier | ExFiles\Box 15\4\ Scan020 | |
| Date | 12th February 1929 | |
| Hs.{Lord Ernest Hives - Chair} DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} c. to SG.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} X.7305 R3/M12.2.29. SS.{S. Smith} - SERRATED INSTEAD OF FABRIC COUPLING. N.sch.2812. Fabric couplings are not really RR. fittings because of their limited life. We must avoid them if possible: we do so on the 20 HP. and should be able to on SS.{S. Smith} Referring to the serrated one on the above N.sch. I should not expect the piece screwed in to be really oil-tight in every specimen, and also the whole thing looks as though it could be simpler to make by either including the screwed piece in the joint or forming or riveting the (present screwed) piece to the flange. I should have thought that the simplest of all would be to move the flange, thus - SEE ORIGINAL FOR SKETCH. saving weight, room, and cost. Could we not oil both with one hole by over-filling one to feed the other? Perhaps I do not know the limits: we must keep getting simpler and lighter. Now I have broken away you will do wonders. R.{Sir Henry Royce} | ||