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).
Test report detailing cylinder bore dimensions before and after a running test.
| Identifier | ExFiles\Box 123\5\ scan0335 | |
| Date | 15th February 1939 | |
| UNIT No B.60. No.1 PASSED TO TEST:- 17-9-38 COMPLETED TEST:- 15-2-39 CYLINDER BORE DIMENSIONS CYLINDER BLOCK EB 3778 MATL: I/C. RUNNING TIME :- 197HRS. 20MINS. (92HRS. 45MINS. F.T.) MILEAGE :- MEASUREMENTS AT CROWN REPRESENT MAX. WEAR AT TOP OF STROKE Diagram Labels: A, B, CROWN, CENTRE, MOUTH, .350, .500 Table Data: BORE No, POSITION, CROWN (BEFORE, AFTER, WEAR), CENTRE (BEFORE, AFTER, WEAR), MOUTH (BEFORE, AFTER, WEAR) 1, A-A, 3.4998, 3.5030, .0032, 3.5000, 3.5002, .0002, 3.5005, 3.5005, NIL. 1, B-B, 3.4998, 3.5056, .0058, 3.5000, 3.5008, .0008, 3.5002, 3.5002, NIL. 1, OVALITY, NIL., .0026, NIL., .0006, .0003, .0003 2, A-A, 3.5000, 3.5016, .0016, 3.5000, 3.5000, NIL., 3.5005, 3.5005, NIL. 2, B-B, 3.4999, 3.5014, .0015, 3.5002, 3.5006, .0004, 3.5003, 3.5003, NIL. 2, OVALITY, .0001, .0002, .0002, .0006, .0002, .0002 3, A-A, 3.5000, 3.5016, .0016, 3.5000, 3.5000, NIL., 3.5007, 3.5007, NIL. 3, B-B, 3.5000, 3.5008, .0008, 3.5002, 3.5006, .0004, 3.5005, 3.5005, NIL. 3, OVALITY, .0000, NIL., .0002, .0006, .0002, .0002 4, A-A, 3.5000, 3.5010, .0010, 3.5000, 3.5000, NIL., 3.5005, 3.5007, NIL. 4, B-B, 3.5000, 3.5008, .0008, 3.5000, 3.5002, .0002, 3.5005, 3.5005, NIL. 4, OVALITY, .0000, NIL., NIL., .0002, .0000, .0002 5, A-A, 3.5000, 3.5030, .0030, 3.5000, 3.5003, .0003, 3.5005, 3.5005, NIL. 5, B-B, 3.5000, 3.5026, .0026, 3.5000, 3.5003, .0003, 3.5002, 3.5004, .0002 5, OVALITY, NIL., .0004, NIL., .0000, .0003, .0001 6, A-A, 3.4998, 3.5018, .0020, 3.4998, 3.5000, .0002, 3.5003, 3.5003, NIL. 6, B-B, 3.5000, 3.5025, .0025, 3.4998, 3.5002, .0004, 3.5002, 3.5002, NIL. 6, OVALITY, .0002, .0007, NIL., .0002, .0001, .0001 | ||