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).
Buffer penetration tests and wheel arch suitability for different tyre sizes.
| Identifier | ExFiles\Box 65\2\ scan0287 | |
| Date | 1st August 1928 | |
| X7820 X7410 To DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to BY.{R.W. Bailey - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}3/LG23. 8.28. re. tests on buffer penetration. With reference to DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}3/M3.7.28 and DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}2/M14.8.28 Our tests shew that we can get 5/8" bump from full load. Under these circumstances we think that 17" wheel arch as shewn on N.sch.2643 will be satisfactory for the 5.25" tyres but we feel it would be advisable to allow an additional 3/4" in the case of the 6" tyres. You will appreciate that we are having to repeat our tests on buffer penetration owing to the present tendency to spring cars ultra flexibly. We are satisfied with the 17" arch for the 5.25" tyres, however. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||