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).
Measurement report on cylinder bore dimensions and wear for a cylinder block after a test run.
| Identifier | ExFiles\Box 97\4\ scan0200 | |
| Date | 24th November 1938 guessed | |
| PASSED TO TEST:- COMPLETED TEST:- UNIT Nº B III No. 5. CYLINDER BORE DIMENSIONS CYLINDER BLOCK E.W. 1580. MATL I/C RUNNING TIME :- 29 hrs. TEST BED MILEAGE :- 15,000. DIAGRAM LABELS: CROWN, CENTRE, MOUTH MEASUREMENTS AT CROWN REPRESENT MAX. WEAR AT TOP OF STROKE TABLE DATA: BORE Nº | POSITION | CROWN (BEFORE, AFTER, WEAR) | CENTRE (BEFORE, AFTER, WEAR) | MOUTH (BEFORE, AFTER, WEAR) 1 | A-A | 3.501, 3.501, NIL | 3.5012, 3.5015, .0003 | 3.5014, 3.5010+, .0004 1 | B-B | 3.5015, 3.5014, .0001 | 3.5016, 3.5027, .0011 | 3.5011, 3.5001, .0010 1 | OVALITY | .0002, .0003, .0001 | .0004, .0012, .0008 | .0003, .0009, .0006 2 | A-A | 3.5013, 3.5019, .0006 | 3.5008, 3.5014, .0006 | 3.5010, 3.5014, .0004 2 | B-B | 3.5014, 3.5015, .0001 | 3.5018, 3.5016+, .0002 | 3.5011, 3.500, .0011 2 | OVALITY | .0001, .0004, .0003 | .0010, .0002, .0008 | .0001, .0014, .0013 3 | A-A | 3.5015, 3.5020, .0005 | 3.5011, 3.5024, .0013 | 3.5014, 3.5015, .0001 3 | B-B | 3.5020, 3.5016+, .0004 | 3.5022, 3.5022, NIL | 3.5017, 3.5009, .0008 3 | OVALITY | .0005, .0004+, .0001 | .0011, .0002, .0009 | .0003, .0006, .0003 4 | A-A | 3.5013, 3.5020, .0007 | 3.5006, 3.5012, .0006 | 3.5009, 3.5005+, .0004 4 | B-B | 3.5016, 3.5015, .0001 | 3.5018, 3.5015, .0003 | 3.5011, 3.5003+, .0008 4 | OVALITY | .0003, .0005, .0002 | .0012, .0003, .0009 | .0002, .0002, NIL 5 | A-A | 3.5010, 3.5027, .0017 | 3.5002, 3.5010, .0008 | 3.5001, 3.5006, .0005 5 | B-B | 3.5009, 3.5016, .0007 | 3.5015, 3.5010, .0005 | 3.5004, 3.4996+, .0008 5 | OVALITY | .0001, .0011, .0010 | .0013, NIL, .0013 | .0003, .0010, .0007 6 | A-A | 3.5015, 3.5031, .0016 | 3.5010, 3.5014, .0004 | 3.5007, 3.5015+, .0008 6 | B-B | 3.5013, 3.5023, .0010 | 3.5015, 3.5013+, .0002 | 3.5013, 3.4994+, .0019 6 | OVALITY | .0002, .0008, .0006 | .0005, .0001+, .0004 | .0006, .0021, .0015 | ||