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).
Log of component failures from a bumping test running at 105 bumps per minute.
| Identifier | ExFiles\Box 119\2\ scan0082 | |
| Date | 27th November 1919 | |
| R.R. 235 100 T) (S F 575, 16-4-19) G 2354 EH/LG27.11.19. FAILURES ON BUMPING TESTS - DRUMS FITTED WITH 2" BUMPS AT 60° - DRUM SPEED 105 PER MINUTE. X.1331.✓ X.2628✓ V.3440✓ Part failed. Piece No. Hrs. run Remarks. Front Spring Clip. K.5400 6 Off side. " " K.5400 9.25 Near Side. " " K.5400 14.20 " " " " K.5400 35.35 " " Front Spring. F.4625 8.25 Top leaf broke near clips O.S. " " F.4625 13.45 " " " " " N.S. " " F.4625 9.25 " " " " " O.S. " " F.4625 26.15 " " " " " O.S. " " F.4625 26.40 " " " " " N.S. " " F.4625 35.35 2 Bottom leaves broken N.S. Centre Bolt for Front Spring - K.5900 29.45 Broken in threaded portion O.S. " " " K.5900 1.20 " " " " N.S. Bolt on rear engine bkt. & Frame - O.S. 10.40 Head broken off. " " N.S. 68.15 " " " Bolt in N.S. diagonal stay. 32.55 " " O.S. " 19.10 Steering Rocking Lever X3465 F.6981 80.0 Ends of both arms broken off. Side Member of Frame F.5297 80.35 Cracked through holes for Radiator. Support. | ||