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 comparing B.17 Rear Main and No.4 Big End bearings after test runs.
| Identifier | ExFiles\Box 97\1\ scan0023 | |
| Date | 27th November 1936 guessed | |
| B.17 REAR MAIN BEARING - R.R.56 Alloy No.4. BIG END BEARING - A.C2 Alloy. RUNNING TIME:- 20 Hrs. light running 1 Hr.30 mins full load 2000-4000 R.P.M. 5 mins. ¼ load at 4000 R.P.M. | ||