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).
The issues with the rear spare wheel carrier and proposed modifications.
| Identifier | ExFiles\Box 68\3\ scan0148 | |
| Date | 9th March 1928 | |
| Hs{Lord Ernest Hives - Chair}/AJL/LG9.3.28. REAR SPARE WHEEL CARRIER (N.Sch.2487-2269) The above has been running on chassis 8-EX for 1500 miles. The carrier is very much less rigid than the standard 20 HP. carrier. Owing to this flexibility the wheel is often found loose, the nut on the carrier bolt having loosened off slightly. It is very difficult to get at this nut to tighten it up reasonably tight due to having to reach between the spare wheel and the rear body panel; it is impossible to use normal leverage, owing to the acrobatics necessary to reach the nut - ones clothes also get covered with dirt from the spare wheel and rear body panel during the operation. The use of a bolt similar to that used on the std. 20 HP. carrier would simplify the operation and enable the wheel to be bolted up really tight. (This type of bolt is in use on the rear carrier of EAC.1 N.Sch.2079, and is successful). It will be necessary to alter the plate so that the bolt screws into it instead of it being slotted as at present. The necessary difference in height between an inflated and deflated tyre being taken up on the dished plate as on the 20 HP. and EAC.1. The type of bolt used on EAC.1. is perhaps preferable to the type used on the 20 HP., the plate is convex instead of concave, allowing the bolt-head to be more accessible for tightening up and loosening off. An indication of the flexibility of the rear frame end can be obtained from the following rough tests :- contd :- | ||