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).
Test report on a leaf spring, detailing specifications, Brinell hardness, and damage remarks for each leaf.
| Identifier | ExFiles\Box 119\2\ scan0120 | |
| Date | 30th July 1920 | |
| X.1331 SPRING F.363 - 2100 lbs. parallel - tapered ends - X.3981. no nibs and slots - ground all over - fitted on bump chassis 28.7.20. X.1331. No. of leaves. Brinell. Remarks. Time run. 6 415 Cracked 1 1/2" from centre rear of clip. 13 hrs. 15 m 1 415 & 429 broken in two places each side of clip. 2 3 444 Cracked under clip. 4 444 O.K. 5 429 O.K. 6 415 O.K. 14 hrs. 10 m Spring taken off 30.7.20. | ||