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 B.17 unit main bearings and shims after a 22-hour full throttle endurance test.
| Identifier | ExFiles\Box 97\1\ scan0029 | |
| Date | 27th November 1936 guessed | |
| UPPER HALVES <-- 1 TO 7 --> ⑧ B.17 UNIT MAIN BEARINGS HOYTS Z3 ALLOY MAIN BEARINGS AFTER 22 HRS. FULL THROTTLE ENDURANCE, EACH HOUR RUN AS FOLLOWS :- 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 IN RR.56 ALLOY. | ||