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 after tests conducted in France.
| Identifier | ExFiles\Box 101\2\ scan0255 | |
| Date | 4th March 1937 | |
| 22GT CYLINDER BORE DIMENSIONS AFTER TESTS IN FRANCE BB, PARALLEL TO CRANKSHAFT AA{D. Abbot-Anderson}, AT RIGHT ANGLES TO CRANKSHAFT CROWN CENTRE MOUTH CYLINDER BLOCK FB2929 I/C DESPATCHED TO FRANCE 8.8.36 & DID 14,240 MILES SINCE ITS RETURN TO ENGLAND HAS COMPLETED 1,175 MILES DRAWING SIZE OF BORE 3.5005,+1 | No | POSITION | AA{D. Abbot-Anderson} | BB | OVALITY | ASSUMED WEAR | |----|----------|---------|---------|---------|--------------| | 1 | CROWN | 3.5022 | 3.5030 | .0008 | .0025 | | | CENTRE | 3.5022 | 3.5030 | .0008 | .0025 | | | MOUTH | 3.5017 | 3.5012 | .0005 | .0012 | | 2 | CROWN | 3.5024 | 3.5032 | .0008 | .0027 | | | CENTRE | 3.5023 | 3.5026 | .0003 | .0021 | | | MOUTH | 3.5020 | 3.5018 | .0002 | .0015 | | 3 | CROWN | 3.5020 | 3.5025 | .0005 | .02 | | | CENTRE | 3.5018 | 3.5024 | .0006 | .0019 | | | MOUTH | 3.5015 | 3.5013 | .0002 | .001 | | No | POSITION | AA{D. Abbot-Anderson} | BB | OVALITY | ASSUMED WEAR | |----|----------|---------|---------|---------|--------------| | 4 | CROWN | 3.5025 | 3.5035 | .001 | .003 | | | CENTRE | 3.5020 | 3.5028 | .0008 | .0023 | | | MOUTH | 3.5020 | 3.5016 | .0004 | .0015 | | 5 | CROWN | 3.5025 | 3.5030 | .0005 | .0025 | | | CENTRE | 3.5020 | 3.5030 | .001 | .0025 | | | MOUTH | 3.5020 | 3.5016 | .0004 | .0015 | | 6 | CROWN | 3.5032 | 3.5032 | NIL | .0027 | | | CENTRE | 3.5022 | 3.5028 | .0006 | .0023 | | | MOUTH | 3.5018 | 3.5015 | .0003 | .0013 | N.B. NO DIMENSIONS WERE TAKEN BEFORE TESTS, SO THAT FIGURES IN "ASSUMED WEAR" COLUMN MAY BE .001 SMALLER. C. HOL. 4.3.37 | ||