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 various front springs subjected to bumping tests.
| Identifier | ExFiles\Box 119\2\ scan0019 | |
| Date | 26th May 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr1/L26514. May 26th. 1914. LIFE OF PARTS ON BUMPING TESTS. FRONT SPRINGS Off set solid eyes, 2nd plate under eye. 3" Humps at 105 revs per minute. Piece No. | Description. | Time Hrs. Mins. | Results. | Reference. --- | --- | --- | --- | --- F.4253 | Front Springs | 9 - 20 | Broke front end. | Wor{Arthur Wormald - General Works Manager}/Mcr4/L27114 F.4254 | " | 30 | Broke front end. | " " | " | 1 - 15 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}11/L9214 " | " | 8 - 10 | Broke top plate | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}8/L12114 " | " | 7 - 15 | " | " " | Front Springs (Woodhead's steel) | 8 - 50 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}7/L13314. " | ditto. | 12 - 0 | " | " " | Front Springs (Firth's steel) | 3 - 15 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}10/L18314 " | ditto. | 11 - 19 | Broke six plates | " " | " | 7 - 39 | ditto. | " | ||