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).
Technical remarks and suggestions on the design for Phantom scuttle isolation.
| Identifier | WestWitteringFiles\S\2April1928-June1928\ Scan043 | |
| Date | 20th April 1928 | |
| ORIGINAL HS.{Lord Ernest Hives - Chair} FROM DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} C. to LHS.{Lord Herbert Scott} SG.{Arthur F. Sidgreaves - MD} BY.{R.W. Bailey - Chief Engineer} re. PHANTOM SCUTTLE ISOLATION. We note that a standardisation sheet for semi-isolation for Phantom is in circulation, and suggest that the enclosed additional slip be added to the sheet to give the C.S.C. a chance of expressing their views. We have seen the sch. L.F.1082. which you propose to use, and wish to make the following remarks:- (1) You do not say how many bolts you propose to use. We should suggest two only about 6" either side of the top of the dash. (2) The continuous rubber strip around the scuttle face has an area of over 80 sq. ins., therefore to compress it at all would require a considerable load, even were it sponge rubber. What actually used to happen on Goshawk was, that the dash was pulled in locally opposite the bolts, thus: [Diagram with labels BONNET, BOLT, RUBBER, SCUTTLE] We would prefer a fairly solid rubber washer to be squeezed up by the bolt and the rest of the face merely filled in with sponge rubber, not under compression normally. Unless we have a sch. such as this which will allow of local closing up between the dash and scuttle at the corners we shall get hammering of the bonnet at the side hinges. (3) We cannot hold the corners of the dash by bolts, as it is here that we must have the freedom for the dash and scuttle to move fore and aft relatively, to prevent hammering on the end of the bonnet side hinge, and cracking of the scuttle. (5) The scuttle panel cannot be extended over the gap as on L.F. 1082., as when movement occurs it will be hammered up. The space must be covered so as to allow of movement, thus - [Diagram of a panel joint] (6) We feel that the issue of scuttle isolation has been confused by a need on the sports car for a support of the dash by the body, which is not required on ordinary steerings. In any case we do not agree to the use of the body to steady the column, and think that we should make the dash and column self contained. In which case we prefer the R-R scuttle damper, and the space filled with sorbo strip. DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||