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 valve dimensions and wear for a Bentley 80 No.1 unit.
| Identifier | ExFiles\Box 124\1\ scan0025 | |
| Date | 23th February 1939 | |
| UNIT Nº BENTLEY 80 Nº1 PASSED TO TEST 9-12-38 COMPLETED TEST 23-2-39 VALVE DIMENSIONS INLET VALVES :- EB 3853-S/65 CYLINDER HEAD - EXHAUST VALVES :- RUNNING TIME :- 68 HRS. MILEAGE :- (18 HRS 50 MINS F.T.) Diagrams: Valve: LENGTH, DIA. 'A' 2.000, DIA. 'B' 1.350 Pocketting: "A" "B" "A" "B", POCKETTING Main Table: Headers: Nº, LENGTH (BEFORE, AFTER, DIFFERENCE), DIA. 'A' (BEFORE, AFTER, WEAR), DIA. 'B' (BEFORE, AFTER, WEAR) INLET VALVES: Nº 1: LENGTH AFTER 4.3885, DIA. 'A' AFTER .3920, DIA. 'B' AFTER .3417 Nº 2: LENGTH AFTER 4.3865, DIA. 'A' AFTER .3415, DIA. 'B' AFTER .3414 Nº 3: LENGTH AFTER 4.3895, DIA. 'A' AFTER .3416, DIA. 'B' AFTER .3413 Nº 4: LENGTH AFTER 4.3870, DIA. 'A' AFTER .3418, DIA. 'B' AFTER .3415 Nº 5: LENGTH AFTER 4.3890, DIA. 'A' AFTER .3414, DIA. 'B' AFTER .3413 Nº 6: LENGTH AFTER 4.3890, DIA. 'A' AFTER .3408, DIA. 'B' AFTER .3405 Nº 7: LENGTH AFTER 4.3810, DIA. 'A' AFTER .3416, DIA. 'B' AFTER .3413 Nº 8: LENGTH AFTER 4.3835, DIA. 'A' AFTER .3415, DIA. 'B' AFTER .3414 EXHAUST VALVES: Nº 6, 7, 10, 11 (rows are blank) POCKETTING Table: Headers: Nº, DIM: 'A' (BEFORE, AFTER, DIFFERENCE), DIM: 'B' (BEFORE, AFTER, DIFFERENCE) INLET: Nº 1, 4, 5, 8, 9, 12 (rows are blank) EXHAUST: Nº 2, 3, 6, 7, 10, 11 (rows are blank) | ||