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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 dimensions and wear measurements for unit BEN.80.No 1.

Identifier  ExFiles\Box 124\1\  scan0023
Date  23th February 1939
  
UNIT Nº BEN.80.No 1.
PASSED TO TEST:- 9.12.38
COMPLETED TEST:- 23.2.39
CYLINDER BORE DIMENSIONS
CYLINDER BLOCK EB.3950 MATL 1/C
RUNNING TIME:- 68 HRS. (18 HRS 50 MINS F.T)
MILEAGE:-
MEASUREMENTS AT CROWN REPRESENT MAX. WEAR AT TOP OF STROKE
TABLE DATA:
BORE Nº 7:
POSITION A-A: CROWN BEFORE 3.5016, CENTRE BEFORE 3.4998, MOUTH BEFORE 3.5012
POSITION B-B: CROWN BEFORE 3.5010, CENTRE AFTER 3.5004, MOUTH BEFORE 3.5012
OVALITY: CROWN WEAR .0006, CENTRE WEAR .0006, MOUTH WEAR NIL.
BORE Nº 8:
POSITION A-A: CROWN BEFORE 3.5012, CENTRE BEFORE 3.4998, MOUTH BEFORE 3.5016
POSITION B-B: CROWN BEFORE 3.5015, CENTRE AFTER 3.5004, MOUTH BEFORE 3.5012
OVALITY: CROWN WEAR .0003, CENTRE WEAR .0006, MOUTH WEAR .0004
BORE Nº 3: All fields empty.
BORE Nº 4: All fields empty.
BORE Nº 5: All fields empty.
BORE Nº 6: All fields empty.
  
  


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