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).
Cylinder bore dimension measurements for Unit 'B' 20, recorded before and after a 17,000-mile road test.
| Identifier | ExFiles\Box 90\5\ scan0135 | |
| Date | 30th June 1936 | |
| UNIT N° 'B' 20. — CYLINDER BORE DIMENSIONS. CYLINDER BLOCK:- EB. 2561. -1/2 DRAWING SIZE OF BORE = 3.5005+1, PRIOR TO & AFTER 17,000 MILES ROAD TEST. "-" DENOTES A DECREASE IN DIAMETER AFTER TEST TABLE OF MEASUREMENTS: | CYL.R | WHEN MEASURED | CROWN | CENTRE | MOUTH | |-------|---------------|------------------|------------------|-------------------|------------------|------------------|-------------------| | | | AA{D. Abbot-Anderson} | BB | OVALITY | AA{D. Abbot-Anderson} | BB | OVALITY | AA{D. Abbot-Anderson} | BB | OVALITY | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 1. | NEW | 3.5013 | 3.5011 | .0002 | 3.5014 | 3.5014 | NIL | 3.5016 | 3.5013 | .0003 | | | AFTER TEST | 3.5022 | 3.5039 | .0017 | 3.5024 | 3.5025 | .0001 | 3.5013 | 3.5005 | .0008 | | | WEAR. | .0009 | .0028 | | .001 | .0011 | | -.0003 | -.0008 | | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 2. | NEW | 3.5015 | 3.5014 | .0001 | 3.5017 | 3.5018 | .0001 | 3.501 | 3.5015 | .0005 | | | AFTER TEST | 3.5026 | 3.5042 | .0016 | 3.5022 | 3.5029 | .0007 | | | | | | WEAR. | .0011 | .0028 | | .0005 | .0011 | | | | | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 3. | NEW | 3.5015 | 3.5015 | NIL | 3.5017 | 3.5019 | .0002 | 3.501 | 3.5016 | .0006 | | | AFTER TEST | 3.5026 | 3.5038 | .0012 | 3.5024 | 3.5027 | .0003 | 3.5015 | 3.5011 | .0004 | | | WEAR. | .0011 | .0023 | | .0007 | .0008 | | .0005 | -.0005 | | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 4. | NEW | 3.5014 | 3.5013 | .0001 | 3.5015 | 3.5018 | .0003 | 3.501 | 3.5017 | .0007 | | | AFTER TEST | 3.5018 | 3.5032 | .0014 | 3.5021 | 3.5027 | .0006 | 3.5017 | 3.5012 | .0005 | | | WEAR. | .0004 | .0019 | | .0006 | .0009 | | .0007 | -.0005 | | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 5. | NEW | 3.5014 | 3.5012 | .0002 | 3.5016 | 3.5016 | NIL | 3.501 | 3.5015 | .0005 | | | AFTER TEST | 3.5022 | 3.5028 | .0006 | 3.5019 | 3.5025 | .0006 | 3.5015 | 3.5013 | .0002 | | | WEAR. | .0008 | .0016 | | .0003 | .0009 | | .0005 | -.0002 | | |-------|---------------|---------|---------|---------|---------|---------|---------|---------|---------|---------| | 6. | NEW | 3.5013 | 3.5012 | .0001 | 3.5016 | 3.5016 | NIL | 3.501 | 3.5013 | .0003 | | | AFTER TEST | 3.5021 | 3.5026 | .0005 | 3.5027 | 3.503 | .0003 | 3.5015 | 3.5011 | .0004 | | | WEAR. | .0008 | .0014 | | .0011 | .0014 | | .0005 | -.0002 | | DIAGRAM NOTES: "AA{D. Abbot-Anderson}" AT RT. ANGLES TO C/SHAFT. "BB" PARALLEL TO C/SHAFT. | ||