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 form for recording inlet and exhaust valve dimensions and pocketing measurements.
| Identifier | ExFiles\Box 108\3\ scan0149 | |
| Date | 15th March 1938 guessed | |
| UNIT Nº PASSED TO TEST COMPLETED TEST VALVE DIMENSIONS INLET VALVES :- CYLINDER HEAD EXHAUST VALVES :- RUNNING TIME :- MILEAGE :- [Diagram of a valve] LENGTH 2.000 DIA. A 1.350 DIA. B [Diagram of pocketting] "A" "B" "A" "B" POCKETTING [Table 1: Valve Dimensions] Nº | LENGTH (BEFORE, AFTER, DIFFERENCE) | DIA. A (BEFORE, AFTER, WEAR) | DIA. B (BEFORE, AFTER, WEAR) INLET 1 4 5 8 9 12 EXHAUST 2 | AFTER LENGTH: 4.428 | AFTER DIA. A: .3403 | AFTER DIA. B: .3393 3 | AFTER LENGTH: 4.431 | AFTER DIA. A: .3407 | AFTER DIA. B: .3398 6 | AFTER LENGTH: 4.435 | AFTER DIA. A: .3404 | AFTER DIA. B: .3395 7 | AFTER LENGTH: 4.4325 | AFTER DIA. A: .3401 | AFTER DIA. B: .339 10 | AFTER LENGTH: 4.433 | AFTER DIA. A: .3406 | AFTER DIA. B: .3395 11 | AFTER LENGTH: 4.430 | AFTER DIA. A: .3401 | AFTER DIA. B: .3396 MAX LENGTH OF VALVE TO DRG 4.437 POCKETTING [Table 2: Pocketting Dimensions] Nº | DIM. "A" (BEFORE, AFTER, DIFFERENCE) | DIM. "B" (BEFORE, AFTER, DIFFERENCE) INLET 1 4 5 8 9 12 EXHAUST 2 3 6 7 10 11 | ||