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).
Test report on clutch performance after 1,000 miles, detailing issues with jaggering and slipping in London traffic.
| Identifier | ExFiles\Box 103\1\ scan0165 | |
| Date | 26th February 1935 | |
| x5300 To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from Sg.{Arthur F. Sidgreaves - MD} Copy to Wor{Arthur Wormald - General Works Manager} E HX. re 21-G-4. Sg{Arthur F. Sidgreaves - MD}19/E26.2.35 Test of Clutch in London traffic - this car has now run nearly 1,000 miles, mostly in London traffic. There seem to be two distinct features of this clutch, i.e. when getting away from standstill in second gear, a fair amount of jaggering is experienced before the clutch goes home. This feature appears to get worse the more traffic driving one does. The other feature is that on one or two occasions under exceptional traffic conditions the clutch has slipped, but unlike the standard clutch rights itself very quickly. We are of the opinion that in its present condition after nearly 1,000 miles the jaggering feature when starting from standstill is such that no RR owner would consider it good enough and we would say that it is worse than the present standard. It has been tried by people at the end of the test who tried it at the commencement and they consider that it has deteriorated after the use it has had. Summed up, the position is that it is worse than standard for judder or jagger from a standing start, but betterfor not slipping. As intimated in the former memo. there are no adverse criticisms of the steering. It is generally agreed that the latter is an improvement over our present standard both for ease in use and reduction in back kicks on the steering wheel. Sg.{Arthur F. Sidgreaves - MD} | ||