Cylinder bore dimension measurements before and after a 50-hour test for unit B.80 No. 3.
| Identifier | ExFiles\Box 124\1\ scan0118 | |
| Date | 20th May 1939 guessed | |
| B. 80. UNIT Nọ 3 CYLINDER BORE DIMENSIONS CYLINDERS:- F.B. 3590 Matl:- Y/C PASSED TO TEST:- COMPLETED TEST:- RUNNING TIME :- 50 HRS. MILEAGE :- MEASUREMENTS AT CROWN REPRESENT MAX: WEAR AT TOP OF STROKE. TABLE DATA: BORE Nọ | POSITION | CROWN (BEFORE, AFTER, WEAR) | CENTRE (BEFORE, AFTER) | MOUTH (BEFORE, AFTER) 1 | A-A | 3.501 | 3.5015 | .0005 | 3.5005 | 3.5006 | 3.5015 | 3.5012 1 | B-B | 3.5015 | 3.5015 | | 3.5015 | 3.501 | 3.5014 | 3.501 1 | OVALITY | .0005 | | | | | | 2 | A-A | 3.5014 | 3.5014 | | 3.5006 | 3.5007 | 3.5021 | 3.5015 2 | B-B | 3.5015 | 3.5014 | | 3.5019 | 3.5013 | 3.50175 | 3.501 2 | OVALITY | .0001 | | | | | | 3 | A-A | 3.5011 | 3.5014 | .0003 | 3.5008 | 3.5006 | 3.5017 | 3.501 3 | B-B | 3.5015 | 3.5014 | | 3.5015 | 3.5013 | 3.5016 | 3.5012 3 | OVALITY | .0004 | | | | | | 4 | A-A | 3.5009 | 3.5012 | .0003 | 3.5005 | 3.5004 | 3.5015 | 3.501 4 | B-B | 3.501 | 3.5013 | .0003 | 3.5012 | 3.5012 | 3.5017 | 3.5007 4 | OVALITY | .0001 | .0001 | | | | | 5 | A-A | 3.501 | 3.5015 | .0005 | 3.5006 | 3.5005 | 3.5011 | 3.5008 5 | B-B | 3.5013 | 3.5014 | .0001 | 3.5013 | 3.501 | 3.5011 | 3.5006 5 | OVALITY | .0003 | .0001 | | | | | 6 | A-A | 3.501 | 3.5013 | .0003 | 3.5004 | 3.5003 | 3.5012 | 3.501 6 | B-B | 3.5011 | 3.5016 | .0005 | 3.5013 | 3.5009 | 3.5008 | 3.5005 6 | OVALITY | .0001 | .0003 | | | | | 7 | A-A | 3.5014 | 3.5015 | | 3.501 | 3.5006 | 3.5013 | 3.5012 7 | B-B | 3.5016 | 3.5014 | | 3.5015 | 3.5012 | 3.5013 | 3.5005 7 | OVALITY | .0002 | .0001 | | | | | 8 | A-A | 3.5009 | 3.5014 | | 3.5005 | 3.5005 | 3.5012 | 3.5013 8 | B-B | 3.5014 | 3.502 | | 3.5012 | 3.5009 | 3.5008 | 3.5003 8 | OVALITY | | | | | | | | ||
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).