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).
Test report detailing connecting rod bearing and crankpin dimension measurements for a B80 Unit Nº 3 after a 50 hour run.
| Identifier | ExFiles\Box 124\1\ scan0119 | |
| Date | 20th May 1939 guessed | |
| B 80 UNIT Nº 3. PASSED TO TEST:- COMPLETED TEST:- RUNNING TIME :- 50 HRS. MILEAGE :- CONN: ROD BEARINGS & CRANKPIN DIMENSIONS. CRANKSHAFT :- EX. 33947 CON: ROD BEARINGS:- MATL :- 4% CARB MATL :- TEST PIECE NO. 3659 TABLE DATA: Column Headers: Nº, POSITION, BEARINGS (BEFORE, AFTER, WEAR), CRANKPIN (BEFORE, AFTER, WEAR), CLEARANCE (BEFORE, AFTER, DIFF:) Nº 1 Position A-A: Bearings Before 2.0025, Crankpin Before 1.9983, Clearance Before .0042, Clearance After .0017. Position B-B: Bearings Before 2.0001, Crankpin After 1.9984. Position Ovality: Bearings Before .0024, Crankpin After/Wear .0001, Clearance Before .004, Clearance After .001. Nº 2 Position A-A: Bearings Before 2.0025, Crankpin Before 1.9985, Clearance Before .004, Clearance After .001. Position B-B: Bearings Before 1.9995, Crankpin After 1.9985. Position Ovality: Bearings Before .003, Clearance Before .0034, Clearance After .00115. Nº 3 Position A-A: Bearings Before 2.0019, Crankpin Before 1.9985. Position B-B: Bearings Before 2.0007, Crankpin After 1.99865, Clearance Before .0034, Clearance After .00115. Position Ovality: Bearings Before .0012, Crankpin Before .00005, Clearance Before .0032, Clearance After .0019. Nº 4 Position A-A: Bearings Before 2.0017, Crankpin Before 1.9985, Clearance Before .0032, Clearance After .0019. Position B-B: Bearings Before 2.0004, Crankpin After 1.9985, Clearance Before .0033, Clearance After .0034. Position Ovality: Bearings Before .0013, Crankpin After/Wear .0001. Nº 5 Position A-A: Bearings Before 2.0019, Crankpin Before 1.9986, Clearance Before .0042, Clearance After .0026. Position B-B: Bearings Before 2.0019, Crankpin After 1.9985, Clearance Before .0033, Clearance After .0022. Position Ovality: Bearings Before -, Crankpin Before .0002. Nº 6 Position A-A: Bearings Before 2.0028, Crankpin Before 1.9986, Clearance Before .0034, Clearance After .0025. Position B-B: Bearings Before 2.001, Crankpin After 1.9984, Clearance Before .001. Position Ovality: Bearings Before .0018. Nº 7 Position A-A: Bearings Before 2.0019, Crankpin Before 1.9986, Clearance Before .0033, Clearance After .0022. Position B-B: Bearings Before 2.0008, Crankpin After 1.9986. Position Ovality: Bearings Before .0011. Nº 8 Position A-A: Bearings Before 2.0019, Crankpin Before 1.9985, Clearance Before .0034, Clearance After .0025. Position B-B: Bearings Before 2.0009, Crankpin After 1.9984. Position Ovality: Bearings Before .001, Crankpin Before .0001. | ||