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).
The life of parts during bumping tests for spring bolts.
| Identifier | ExFiles\Box 119\2\ scan0025 | |
| Date | 30th April 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr1/L30414. April 30th. 1914. LIFE OF PARTS ON BUMPING TESTS. SPRING BOLTS. 3" Bumps at 105 revs. per minute. Piece No. | Description. | Time. Hrs. Mins. | Results. | Reference. --- | --- | --- | --- | --- K5900. | Front Spring Centre Bolt near side. | 1 - 15 | sheared. | Wor{Arthur Wormald - General Works Manager}/EH1/L10913. K5900 | ditto. | 20 | " | Wor{Arthur Wormald - General Works Manager}/EH6/L12913 K5900 | ditto. | 15 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}1/C18913. K5900 | ditto. | 5 - 4 | " | " K5900 | ditto. | 5 - 19 | " | Wor{Arthur Wormald - General Works Manager}/Mcr4/L27114 K5900 | ditto. | 11 - 0 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}11/L9214 K5900 | ditto. | 7 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}3/L26913. K5900 | ditto. | 28 | " | " K5900 | ditto. | 3 | " | " K5900 | ditto. | 2 | " | " K5900 | ditto. | 4 | " | " | ||