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).
The condition and dimensions of cylinder bores after a grind out.
| Identifier | ExFiles\Box 87\2\ scan0240 | |
| Date | 12th October 1936 | |
| CONN. RODS HAVE No. .031" DIA: HOLE IN SIDE REPORT UPON CONDITION OF CYLINDERS CHASSIS Nº B-34-BN{W.O. Bentley / Mr Barrington} JOB Nº 35702 DATE 12-10-36 1ST GRIND OUT MILEAGE 27270 KMS. ORIGINAL BORES YES. CYLINDER BORE DIMENSIONS NOTE { DIM'S "AA{D. Abbot-Anderson}" TAKEN AT RT ANGLES TO C' SHAFT. DIM'S "BB" TAKEN PARALLEL TO C' SHAFT. PLEASE REFER TO ATTACHED KEY SHEET REF. SR/VA TABLE DATA: Nº CYLINDER | MOUTH | CENTRE | CROWN HEADERS: AA{D. Abbot-Anderson} | BB | OVALITY | WEAR MAXIMUM | A.A | B.B | OVALITY | WEAR MAXIMUM | A.A | B.B | OVALITY | WEAR MAXIMUM CYLINDER 1: MOUTH: 1: 3·25025, 3·250, .00025, .00025 | 2: 3·251, 3·25125, .00025, .00125 | NEW 3·250 CENTRE: 3: 3·25175, 3·25275, .001, .00275 | NEW 3·250 CROWN: 4: 3·251, 3·25125, .00025, .00125 | 5: 3·25325, 3·25325, .00025, .00325 | NEW 3·250 CYLINDER 2: MOUTH: 1: 3·2505, 3·250, .0005, .0005 | 2: 3·2505, 3·2515, .001, .0015 | NEW 3·250 CENTRE: 3: 3·2515, 3·253, .0015, .003 | NEW 3·250 CROWN: 4: 3·25075, 3·25225, .0015, .00225 | 5: 3·25425, 3·25375, .0005, .00425 | NEW 3·250 CYLINDER 3: MOUTH: 1: 3·250, 3·250, NIL, NIL | 2: 3·251, 3·25125, .00025, .00125 | NEW 3·250 CENTRE: 3: 3·25125, 3·253, .00175, .003 | NEW 3·250 CROWN: 4: 3·251, 3·25275, .00175, .00275 | 5: 3·2545, 3·254, .0005, .0045 | NEW 3·250 CYLINDER 4: MOUTH: 1: 3·2505, 3·250, .0005, .0005 | 2: 3·25075, 3·25125, .0005, .00125 | NEW 3·250 CENTRE: 3: 3·2515, 3·253, .0015, .003 | NEW 3·250 CROWN: 4: 3·25075, 3·25225, .0015, .00225 | 5: 3·25325, 3·254, .0075, .004 | NEW 3·250 CYLINDER 5: MOUTH: 1: 3·2505, 3·250, .0005, .0005 | 2: 3·2505, 3·25125, .00075, .00125 | NEW 3·250 CENTRE: 3: 3·25125, 3·25225, .001, .00225 | NEW 3·250 CROWN: 4: 3·2505, 3·252, .0015, .002 | 5: 3·25225, 3·251, .00125, .00225 | NEW 3·250 CYLINDER 6: MOUTH: 1: 3·250, 3·250, NIL, NIL | 2: 3·2505, 3·25075, .00025, .00075 | NEW 3·250 CENTRE: 3: 3·25125, 3·252, .0075, .002 | NEW 3·250 CROWN: 4: 3·25075, 3·251, .00025, .001 | 5: 3·252, 3·251, .001, .002 | NEW 3·250 NOTE. RECORD CARDS OF CAR STATE "CYLINDER BORE SIZES" "STANDARD". VA 14·10·36 | ||