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).
Results of bumping tests on various cross members.
| Identifier | ExFiles\Box 119\2\ scan0048 | |
| Date | 30th April 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr7/L30414 April 30th. 1914. LIFE OF PARTS ON BUMPING TESTS CROSS MEMBERS. 3" Humps at 105 revs. per minute | Piece No. | Description. | Time Hrs. Mins | Results. | Reference. | |---|---|---|---|---| | F2745. | Cross Member. | 2 - 55 | cracked | Wor{Arthur Wormald - General Works Manager}/MH{M. Huckerby}1/L10913 | | F2745. | Cross Member combined with extra member F3781. | 2 - 0 4 - 35 | Rear Member cracked in flange. broke. | Wor{Arthur Wormald - General Works Manager}/Mcr4/L27114. | | F3795. | 1 3/4" Cross Member diagonal stays. | 21 - 5 | Tube broke | Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}11/L9214 | | ||