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).
Issues with the Bentley jacking system and proposed improvements.
| Identifier | ExFiles\Box 139\1\ scan0171 | |
| Date | 17th June 1936 | |
| X1166 To Sg.{Arthur F. Sidgreaves - MD} from E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Cx.{Major Len W. Cox - Advertising Manager} Bly.{B. W. Bleaney - Bentley Sales} E.10/HP.17.6.36. re Bentley Jacking System. Replying to your memo Sg.{Arthur F. Sidgreaves - MD}8/E.15.6.36, there is no provision yet for incorporating the improved jacking on production. It will be remembered on the occasion of the last discussion on this matter which took place in Wor{Arthur Wormald - General Works Manager}'s office, some delay had occurred due to the fact that it had been found that the original standard jack would not go underneath the spring under the worst conditions when the tyre was off the rim, and the car was loaded down with baggage and passengers, and also if it did go under the spring there was insufficient lift. This necessitated getting another jack from Dunlop's. We have now had two samples, one a triple and the other a double lift. The first one we consider too wobbly to be a practical job. The second one is satisfactory except that the head of the jack is so badly attached that it comes adrift in use. The jack head as designed is really unnecessarily complicated and also looses height, so we are sending through a modification to Dunlops for getting this altered. There then remains the question of the jacking pads the rear ones on Hancock's car, which has recently done 10,000 miles have been damaged, Hancock thinks by flying stones. It is possible that the damage may also be due to the jack head not being correctly placed, which might occur in practice. We have therefore, strengthened up this feature, at the same time raising the height of the pad to suit the new jack. We do not think the modifications call for a further road test. We are regarding this matter of improving the Bentley jacking as extremely urgent. It is unfortunate that the delays mentioned have occurred, but we hope to have the scheme in being and satisfactory form for passing within the next week or two, and we are asking By.{R.W. Bailey - Chief Engineer} subject to agreement on standardisation being then reached, when the change could be incorporated in production With regard to the Stephenson jacking system as | ||