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).
With a sketch discussing a bumper design using 'U' and semi-elliptic springs to absorb collision impacts.
| Identifier | ExFiles\Box 19\4\ Scan037 | |
| Date | 14th June 1930 | |
| COPY. OY. From E.{Mr Elliott - Chief Engineer} C. to Sg.{Arthur F. Sidgreaves - MD} C. to Hs.{Lord Ernest Hives - Chair} C. to By.{R.W. Bailey - Chief Engineer} re. BUMPERS. X. 7772. X. 4522. In reply to your memo. of the 12th.inst., we have seen a design of bumper in which the front bar is carried by two 'U' springs from the dumb irons, and is then supported in a forward direction by two semi-elliptic springs clamped by their centres to the dumb irons, somewhat as shewn in sketch. This bumper appears to be practically immune from the danger of closing in of the front dumb irons from a central collision, as the foreshortening of the front bar should be accomodated by the twisting of the 'U' shaped carriers. Can you obtain something on these lines?. | ||