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).
Failure of torsion springs on an exhaust silencer cutout and a proposed modification.
| Identifier | ExFiles\Box 68\1\ scan0343 | |
| Date | 17th March 1925 | |
| X. 8490 To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. to CJ. HS.{Lord Ernest Hives - Chair} S E C R E T. E4/M17.3.25. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. EXHAUST SILENCER CUTOUT 'V' SERIES. X. 8490 We send you herewith blue print of Sch.626 dealing with the above. The torsion springs on the original design of cutout valve are reported to have failed. We are still awaiting complete evidence of the reason for this but it is probable that they have become softened and weakened by heat. It is also understood that the torsion type of spring is more affected by mud than the tension type. We have therefore shewn the cutout fitted with a tension spring in the most practical manner we can think of. It is possible that this modified spring may survive the standard chassis dynamometer test, whereas it is certain we should have to remove the torsion springs to save them. E.{Mr Elliott - Chief Engineer} | ||