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).
Bumping test results detailing the lifespan of spring clips.
| Identifier | ExFiles\Box 29\4\ Scan001 | |
| Date | 11th May 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr14/L11514. X1333 May 11th. 1914. LIFE OF PARTS ON BUMPING TESTS. SPRING CLIPS. 3" Humps at 105 revs. per minute. Piece No. | Description. | Time Hrs. Mins. | Results. | Reference K.5400 | Spring Clip, near side. | 1 - 48 | Broke. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}3/L271113 ditto. | ditto. | 3 - 32 | " | " " | " | 7 - 25 | " | " " | " | 1 - 46 | " | " " | " | 4 - 46 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}19/L101113 " | " | 3 - 23 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}19/L221013 " | " | 6 - 20 | " | " " | " | 9 - 5 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}11/L9214. " | " | 59 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}27/L61113 " | " | 6 - 27 | " | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}5/L201113. " | " | 7 - 10 | " | " " | " | 4 - 10 | both broke. | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}23/M111213 | ||