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 table and diagram detailing leaf spring failures.
| Identifier | ExFiles\Box 69\2\ scan0289 | |
| Date | 17th December 1924 guessed | |
| SUMMARY OF SPRING FAILURES. REF. N.o | PIECE N.o | POSITION OF SPRING. | POSITION OF LEAF. | $ POSITION OF FRACTURE | * COMP. | REBOUND | RUNNING TIME | THICKNESS OF LEAF. | BRINELL AT FRACTURE --- | --- | --- | --- | --- | --- | --- | --- | --- | --- 033 | F71930 | Off | Top | 14" to rear | A | 1.9" | 2.4" | 33 - 25 | .291" | 363 034 | F71929 | Near | Top | 1.75" to rear | B | 2.0" | 2.6" | 14 - 2 | .290" | 401 036 | F70881 | Off | Next to Bottom | 1.25" to rear | D | 1.6" | 2.1" | 20 - 20 | .262" | 415 | | | Bottom | 1.5" to rear | C | - | - | 26 - 7 | .262" | 388 | | | Top. | 16.5" to front | F | - | - | 26 - 47 | .306" | 388 | | | 3rd (from top) | 1.75" to front | E | - | - | 26 - 47 | .283" | 388 037 | F70880 | Near | Top | 14.25" to rear | A | 1.5" | 2.1" | 18 - 3 | .305" | 415 | | | 5th (from top) | 2" to rear. | G | - | - | 18 - 3 | .268" | 415 $ MEASURED FROM CENTRE BOLT. * POSITION OF FRACTURES. DIAGRAM TEXT: FRONT. REAR. A, B, C, D, E, F, G | ||