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).
Photograph of disassembled pinion bearing components with typed failure analysis reports.
| Identifier | ExFiles\Box 84\4\ scan0350 | |
| Date | 11th November 1937 | |
| 5-B-IV Pinion Bearing GB.2680. Bearing fitted 20.10.37, removed 4.11.37 after 84 hours on Dynamometer at full throttle 2,000 r.p.m. in 3rd gear. Failure due to one ball breaking in 3 pieces. 5-B-IV Pinion Brg. GB.2680. Fitted 5.11.37. ex B-23-A.E., removed 11.11.37 after, 12 hrs full throttle 2,000 r.p.m in 3rd gear. 4 " " " 2,000 " " bottom gear. 1 " " " 2,400 " " ". failed. - Above bearing had completed 21,626 miles prior to test. | ||