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).
Fitting of a luggage grid and a detailed analysis of rear spring squeaking, suggesting solutions.
| Identifier | Morton\M22\ img091 | |
| Date | 31th May 1920 | |
| To HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} Copy to CJ. x.3928. x.3507 x.3981 RE 6 EX. x.2628 ORIGINAL RECEIVED 2 - JUN 1920 I put off going to the Fens with the object of trying this car, principally owing to the strike, so it will give you a little extra time to be sure that you have everything fitted that it is desirable I should see. Considering that you are putting the luggage grid brackets on, I think it would be worth while to fit a luggage grid also. With reference to the rear springs, you say "taper ends to leaves". If this refers to taper in thickness, do you think it would be a good thing to fit the ferodo between the leaves, which one would conclude is the most satisfactory way of stopping the squeaking but maintaining the friction. In our studies of the spring question we find that the whole weight imposed on the end of the spring seems to be handed on at the end of each leaf until it arrives at the shortest plate, so that you will not expect to find any pressure between the leaves except at the ends, and it is highly desirable to make the ends of the plates of the largest area, and the best bedding possible to enable them to maintain the lubrication, or the anti-seizing material between the surfaces. If you watch carefully I think we should be able to distribute the 1000 or more lbs. at the end of each of these leaves over about 4" of surface. If the ferodo does not promise to be successful, I think it would be wise to try the effect of other materials, such as sheet brass. If a sheet of metal is fitted between the plates I think it will be found that half the longitudinal movement is taken on each side of the plate. Such metal as brass might also prevent seizure. R.{Sir Henry Royce} [Handwritten Initials: FHR] [Footer text: H R 5227 (200.M) (P D' 408 80-4-19) REF S12017] | ||