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).
Summary of frame failures from a bump test, detailing cracks with corresponding running times and sketches.
| Identifier | ExFiles\Box 73\2\ scan0317 | |
| Date | 1st April 1942 | |
| BUMP TEST SUMMARY CONT'D (N.SCH. 1706) FRAME FAILURES. SHEET 4. TABLE OF FAILURES: Piece N^o | Running Time (HRS MINS) | Remarks. F2888 | 16 - 15 | Near-side flange 3rd cross-member cracked (Sketch 1) F7387 | 24 - 40 | Near-side channel member cracked (Sketch 2). F1328 | 27 - 40 | Both near-side and off-side brck'ts to 3rd cross member cracked (Sketch 3). F7388 | 45 - 15 | Off-side channel member cracked at ballast box support hols (Sketch A). F2406 | 55 - 0 | Near-side strut joining 3rd cross-member to rear spring fulcrum broken. F7387 | 70 - 35 | Near-side channel member cracked (@ Sketch 5). F7387 | 78 - 7 | Near-side channel member cracked (@ Sketch 5). F7387 | 91 - 33 | Near-side channel member cracked (@ Sketch 5). SKETCHES: Sketch 1: Shows 'CRACKS' on a circular flange. Sketch 2: Shows a 'CRACK' on a diamond-shaped plate. Sketch 3: Shows 'CRACKS' on a multi-holed bracket. Sketch A: Shows 'CRACKS' on a frame member above a leaf spring assembly. Sketch 5: Shows 'CRACK @ A' and 'CRACK @ B' on a mounting plate. Sketch 6: Shows a 'CRACK' at the joint of a lever and a spring. | ||