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 main bearing dimensions before and after a running test.
| Identifier | ExFiles\Box 124\1\ scan0019 | |
| Date | 23th February 1939 | |
| MAIN BEARINGS DIMENSIONS UNIT Nº BEN. 80. No. 1 PASSED TO TEST :- 9-12-38 COMPLETED TEST :- 23-2-39 RUNNING TIME :- 68 HRS MILEAGE :- (18 HRS 50 MINS F.T.) CRANKSHAFT: EB.4104. MATL: 4461/1CAB TEST PIECE Nº: -- MAIN BEARINGS: VANDERVELL MATL: STRIP S/W/MT. TABLE DATA: BEARINGS C/SHAFT CLEARANCE BEFORE AFTER WEAR BEFORE AFTER WEAR BEFORE AFTER WEAR 8. A-A 2.4934 2.4970 .0023 8. B-B 2.4933 2.4965 .0023 8. OVALITY .0001 .0005 9. A-A 2.5000 2.4970 .0032 9. B-B 2.5002 2.4970 .0030 9. OVALITY .0002 NIL. 3. A-A, B-B, OVALITY 4. A-A, B-B, OVALITY 5. A-A, B-B, OVALITY 6. A-A, B-B, OVALITY 7. A-A, B-B, OVALITY MAX. & MIN. CLEARANCES GIVEN. GAUGE SIZE: | ||