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).
Bump test report detailing fracture analysis on two Firth leaf springs.
| Identifier | ExFiles\Box 119\2\ scan0217 | |
| Date | 29th October 1924 | |
| BUMP TEST OF LATEST PATTERN FIRTH SPRINGS, (F71980/1), CONTD TABLE HEADERS: SPRING DETAILS. FRACTURE. POSITION OF LEAF. POSITION OF FRACTURE FROM CENTRE BOLT. APPROXIMATE RUNNING TIME. THICKNESS OF LEAF AT FRACTURE. BRINELL AT FRACTURE. ROW 1: Nº015. NEAR SIDE. F71980. 1100 LBS. FLEXION: COMPRESSION = 1.5"; REBOUND = 2.8". POSITION OF FRACTURE FRONT REAR K Top 2" TO REAR 11 - 35 .300" 388. ROW 2: Nº016. NEAR SIDE. F71980. 1100 LBS. FLEXION: COMPRESSION = 1.5"; REBOUND = 2.8". POSITION OF FRACTURE FRONT REAR L Top 16.5" TO REAR. 13 - 37 .285" 388 SIGNATURE/INITIALS: FHP. | ||