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).
Analysis of bumping tests showing the average life of various parts.
| Identifier | ExFiles\Box 119\2\ scan0056 | |
| Date | 9th June 1914 | |
| Wor{Arthur Wormald - General Works Manager}/Mcr20/L9614. June 9th. 1914. ANALYSIS OF BUMPING TESTS. Average Life of Parts. Piece No. Description of Part. Hrs. Mins. F.4139. FRONT SPRING. Rolled eye, second plate extended. Thin top plate. 20 G.3720. RADIATOR SUSPENSION BRACKET. near side gun-metal. 30 F.3727. STEERING LEVER. Off side. 45 F.812. FRONT SPRING. Rolled eye. Near side. 1 - 5 F.4140. FRONT SPRING. Rolled eye, 2nd plate extended. 1 - 45 F.2989. FRONT SPRING 2¼" wide. 1 - 55 K.5900. SPRING BOLT. Near side. 2 - 2 F.3728. STEERING LEVER, Near side. 2 - 5 F.4135. FRONT SPRING. Rolled eye, 2nd plate extended. 2 - 40 G.2760. AXLE TUBE. 2 - 50 F.812 FRONT SPRING. Rolled eye, off side. 2 - 54 F.2745. CROSS MEMBER. 2 - 55 F.2353. FRONT AXLE PIVOTS. Off side. 2 - 59 K.315. VERTICAL BOLT IN DUMB IRON, near side. 3 - 7 K.5900. SPRING BOLT. Off side. 3 - 13 F.3212. SIDE STEERING TUBE. 3 - 28 F.1325/6. FRAME. 3 - 30 F.951. TOP STEERING LEVER. 3 - 32 F.4137. FRONT SPRINGS. Rolled eye, 2nd plate extended. 3 - 33 | ||