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).
Bumper test report for an 11-leaf spring, showing Brinell hardness and failure results.
Identifier | ExFiles\Box 119\2\ scan0138 | |
Date | 23th December 1920 | |
RFE X.1331 Filed 23 12 20 file X.1331 - BUMPER TEST. F.4630 - Spring consiting of 11 leaves, with tapered ends, nibs, slots and tie clips. Lbs. 950. Fitted to N.S. Bump chassis 5.11.20. No. of leaves. | Brinell. | Remarks. | Time run. ---|---|---|--- 1 | 415 | O.K. | 2 | 444 | O.K. | 3 | 415 | O.K. | 4 | 477 | Broken in centre. | 5 | 444 | O.K. | 6 | 161 | O.K. | 13 hrs. 35 mins. 7 | 444 | O.K. | 8 | 415 | O.K. | 9 | 429 | O.K. | 10 | 477 | Broken in centre. | 11 | 388 | " " " | E F O DEC 16 RECEIVED | ||