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Test report detailing the dimensional measurements of main bearings and a crankshaft before and after a 50-hour test run.

Identifier	ExFiles\Box 124\1\ scan0117
Date	20th May 1939 guessed

B 80 UNIT N° 3 PASSED TO TEST:- COMPLETED TEST:- RUNNING TIME:- 50 HRS. MILEAGE:- MAIN BEARINGS DIMENSIONS. [Diagram of a bearing with A-A and B-B axes] [Diagram of a bearing cross-section with 'A' and 'B' dimensions and an 'OIL HOLE'] MAIN BEARINGS :- VANDERVELL MATL:- STRIP WM/T BEARING CRANKSHAFT :- EX. 33917 MATL:- 4% CARB. TEST PIECE N°:- 3659 \| \| BEARINGS \| C/SHAFT \| CLEARANCE \| \|---\|---\|---\|---\| \| \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| WEAR \| BEFORE \| AFTER \| WEAR \| \| 1 \| A-A \| 2.7526 \| 2.7513 \| \| 2.750 \| 2.7498 \| .0002 \| .0025 \| .0015 \| \| \| \| B-B \| 2.753 \| 2.7523 \| \| 2.7501 \| 2.7497 \| .0004 \| .0029 \| .0026 \| \| \| \| OVALITY \| .0005 \| .001 \| \| .001 \| .001 \| \| \| \| \| \| 2 \| A-A \| 2.7526 \| 2.7513 \| \| 2.7501 \| 2.7497 \| .0004 \| .0025 \| .0016 \| \| \| \| B-B \| 2.7528 \| 2.7517 \| \| 2.7501 \| 2.7498 \| .0003 \| .0027 \| .0019 \| \| \| \| OVALITY \| .0002 \| .0004 \| \| .0001 \| \| \| \| \| \| \| 3 \| A-A \| 2.7526 \| 2.7518 \| \| 2.7503 \| 2.7501 \| .0002 \| .0023 \| .0017 \| \| \| \| B-B \| 2.7526 \| 2.7519 \| \| 2.7501 \| 2.7498 \| .0003 \| .0025 \| .0021 \| \| \| \| OVALITY \| \| .0001 \| \| .0002 \| .0003 \| \| \| \| \| \| 4 \| A-A \| 2.7525 \| 2.7517 \| \| 2.7502 \| 2.750 \| .0002 \| .0023 \| .0017 \| \| \| \| B-B \| 2.7526 \| 2.7521 \| \| 2.7501 \| 2.7498 \| .0003 \| .0025 \| .0023 \| \| \| \| OVALITY \| .0001 \| .0004 \| \| .0001 \| .0002 \| \| \| \| \| \| 5 \| A-A \| 2.7524 \| 2.7514 \| \| 2.7501 \| 2.7499 \| .0002 \| .0023 \| .0015 \| \| \| \| B-B \| 2.7528 \| 2.7524 \| \| 2.7501 \| 2.7499 \| .0002 \| .0027 \| .0025 \| \| \| \| OVALITY \| .0004 \| .001 \| \| \| \| \| .. \| \| \| \| 6 \| A-A \| 2.7526 \| 2.7516 \| \| 2.7502 \| 2.7502 \| \| .0024 \| .0014 \| \| \| \| B-B \| 2.7523 \| 2.7519 \| \| 2.7502 \| 2.7501 \| .0001 \| .0021 \| .0018 \| \| \| \| OVALITY \| .0003 \| .0003 \| \| \| .0001 \| \| \| \| \| \| 7 \| A-A \| 2.7528 \| 2.7518 \| \| 2.7503 \| 2.7502 \| .0001 \| .0025 \| .0016 \| \| \| \| B-B \| 2.7528 \| 2.7517 \| \| 2.7502 \| 2.7501 \| .0001 \| .0026 \| .0016 \| \| \| \| OVALITY \| \| .0001 \| \| .0001 \| .0001 \| \| \| \| \| \| 8 \| A-A \| 2.7526 \| 2.7516 \| \| 2.7503 \| 2.7502 \| .0001 \| .0023 \| .0014 \| \| \| \| B-B \| 2.7528 \| 2.7523 \| \| 2.7502 \| 2.7501 \| .0001 \| .0026 \| .0022 \| \| \| \| OVALITY \| .0002 \| .0007 \| \| .0001 \| .0001 \| \| \| \| \| \| 9 \| A-A \| 2.7525 \| 2.7513 \| \| 2.7501 \| 2.7498 \| .0003 \| .0024 \| .0015 \| \| \| \| B-B \| 2.753 \| 2.7528 \| \| 2.7502 \| 2.7501 \| .0001 \| .0028 \| .0017 \| \| \| \| OVALITY \| .0005 \| .0015 \| \| .0001 \| .0003 \| \| \| \| \|

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).