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).
Life of springs during bumping tests.
| Identifier | ExFiles\Box 79\3\ scan0175 | |
| Date | 1st May 1914 | |
| X/332 Wor{Arthur Wormald - General Works Manager}/Mcr7/L1514. May 1st.1914. LIFE OF PARTS ON BUMPING TESTS. S P R I N G S. 3" Humps at 105 revs. per minute. Piece No. | Description. | Time Hrs. Mins. | Results. | Reference. F.812 | Front Spring, near side | 55 | Broke top leaf. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}1/C18913 F.812 | ditto. | 1 - 48 | Front end broke | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}3/L271113. F.812 | ditto. | 53 | Broke front end | " F.812 | ditto. | 25 | " | " F.812 | ditto. | 26 | " | " F.812 | ditto. | 1 - 40 | " | " F.812 | ditto. | 1 - 17 | Broke. | " F.812 | ditto. | 32 | " | " F.812 | ditto. | 55 | " | " F.812 | ditto. | 28 | " | " F.812 | ditto. | 1 - 55 | " | " F.812 | ditto. | 40 | " | " F.812 | ditto. | 40 | " | " | ||