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, failures observed over time, and subsequent Brinell hardness tests on a broken spring.
Identifier | ExFiles\Box 119\2\ scan0116 | |
Date | 24th June 1920 | |
EFc X.1331 BUMPER TEST. X. 3981 File Spring with 12 leaves O.S. F.4666 - 2000 lbs. N.S. F.4665 - 2226 lbs. Date. | Total hrs. | Remarks. -------------------------------------------------------------------------------------------------- 24.6.20 | | 25.6.20. | 7 hrs.45 mins. | Bolt and cap K.419 broken O.S. centre main bearing bracket. 26.6.20 | | 28.6.20. | | 29.6.20 | | 30.6.20. | | 1.7.20 | 35 hrs.40 mins. | Bolt broken centre main bearing bracket O.S. K.419. 1.7.20 | 36 " 45 " | leaf [handwritten annotation] Bottom leaf O.S1 broken 5" from rolled eye. Front diagonal stay broken close to cross member. BRINELL TESTS OF BROKEN SPRING. 1st. | 415 | O.K. 2 | 444 | " 3 | 495 | " 4 | 495 | " 5 | 444 | " 6 | 461 | " 7 | 461 | " 8 | 415 | " 9 | 444 | " 10 | 444 | " 11 | 415 | " 12 | 444 & 388 where broken. [Stamp] E C JUL 19 RECEIVED. | ||