Photograph showing B3 Unit RR.56 main bearings with modified intermediate grooves after a test run which resulted in seizing.
| Identifier | ExFiles\Box 97\1\ scan0030 | |
| Date | 27th November 1936 guessed | |
| B3 UNIT. RR.56 MAIN BEARINGS (MODIFIED INTERMEDIATE GROOVES) AFTER RUNNING IN PERIOD. 1/4 HOUR AT 4,000 R.P.M. FULL THROTTLE. 1/2 HOUR AT 4,250 R.P.M. FULL THROTTLE. 2 MINS. AT 4,500 R.P.M. FULL THROTTLE. SEIZING TOOK PLACE AT 4,500 R.P.M. ON CENTRE AND INTERMEDIATE. UPPER HALVES <- 1 TO 7 -> 9 | ||
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).