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).
Examination of a Hooper Cabriolet de Ville experiencing rattles and knocks, focusing on incorrect subframe supports and floorboards.
| Identifier | ExFiles\Box 104\3\ scan0037 | |
| Date | 7th September 1927 | |
| Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} from DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} c. to R.{Sir Henry Royce} SG.{Arthur F. Sidgreaves - MD} X5380 DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}1/M7.9.27. RE. HOOPER CABRIOLET DE VILLE. X.5330 INDIA. X.5380 R.{Sir Henry Royce} asked us to examine this car as he has experienced violent rattles and knocks emanating from the scuttle and floor. We find that the body mounting and floorboards are widely different from those our designs have called for. (1) SUBFRAME FORWARD SUPPORTS. These were originally sent on the frame itself to F.53572. (1V.) but we later asked (in DAL/M8.11.26.) that Derby would set out some modified pots and rubbers on the lines of those shewn for Phantom on N.sch.2241. Hooper's informed us that modified pieces were fitted to the frame itself by Derby, but it would appear that Derby have not altered the pieces on the chassis to correspond before mounting, with the result that the body has no sideways control, and the subframe knocks the main frame. Packings are missing under the 2 lower pots, so that the body rests on the main frame and creaks loudly. The whole mounting is hopelessly wrong. Would BY.{R.W. Bailey - Chief Engineer} send us a print of the modified support on the lines of N.sch.2249 which we presume was set out and instructed. (2) FLOORBOARDS ( FRONT). The treatment of the front foot and floor boards in no way resembles that called for on N.sch.1989 (V.{VIENNA}) The sloping board is all in one piece instead of two pieces, and a contd :- | ||