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 showing B.17 unit Hoyt's metal main bearings and shims after an 11-hour full throttle endurance test.
| Identifier | ExFiles\Box 115\1\ scan0206 | |
| Date | 27th November 1936 guessed | |
| B.17 UNIT. HOYT'S METAL MAIN BEARINGS AFTER 11 HOURS FULL THROTTLE ENDURANCE AS FOLLOWS FOR EACH HOUR :- 30 MINS at 4,000 R.P.M. 25 MINS at 4,250 R.P.M. 5 MINS at 4,500 R.P.M. SHIMS RR.56 UPPER HALVES <- 1 TO 7 -> ⑦ | ||