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).
Table of measurements showing wear on inlet and exhaust valves after a 17,000-mile test.
| Identifier | ExFiles\Box 83\1\ scan0280 | |
| Date | 4th November 1935 | |
| UNIT NỌ B.22 INLET VALVES : EB.2793 - S/SLY EXHAUST VALVES : EB.2970 - NỌS 2,3,&6 -KE.965 - NỌS 7,10, & 11 - S/SLY STELLITED TIPS AND SEATS. VALVE GUIDES: EB.1782 - 1/C DIMENSIONS OF VALVES AFTER 17,000 MILES TEST. Ex I. 69 TABLE HEADERS: NỌ | DIMENSIONS SHOWING EXTENT OF POCKETING | LENGTH OF VALVES | DIMENSIONS SHOWING CLEARANCE IN GUIDES | DIMENSION 'A' | DIMENSION 'B' | AVERAGE EXTENT OF POCKETING | DIMENSION 'C' | DIMENSION 'D' | DIAMETER OF STEM | DIAMETER OF GUIDE | CLEARANCE | BEFORE TEST | AFTER TEST | VARIATION | BEFORE TEST | AFTER TEST | VARIATION | | BEFORE TEST | AFTER TEST | VARIATION | BEFORE TEST | AFTER TEST | VARIATION | 'E' | 'F' | 'G' | MAXIMUM | MINIMUM TABLE DATA: INLET-VALVES 1 | .931 | 1.002 | .0110 | .989 | .998 | .009 | .010 | 4.518 | 4.520 | .002 | 4.389 | 4.3915 | .0025 | .3417 | .3412 | .0005 | .3448 | .3446 | .3447 | .0036 | .0034 4 | .972 | .982 | .0100 | .971 | .985 | .014 | .012 | 4.523 | 4.524 | .001 | 4.397 | 4.400 | .003 | .3415 | .341 | .0005 | .3448 | .3448 | .3451 | .0041 | .0038 5 | .980 | .985 | .0050 | .980 | .9865 | .0065 | .0058 | 4.517 | 4.519 | .002 | 4.391 | 4.3935 | .0025 | .3417 | .3411 | .0006 | .3445 | .3445 | .3452 | .0041 | .0034 8 | .988 | .998 | .010 | .991 | .999 | .008 | .009 | 4.521 | 4.5225 | .0015 | 4.401 | 4.403 | .002 | .3414 | .3411 | .0003 | .3449 | .3447 | .345 | .0039 | .0036 9 | .986 | .9925 | .0065 | .984 | .9945 | .0105 | .0085 | 4.522 | 4.524 | .002 | 4.397 | 4.400 | .003 | .3414 | .341 | .0004 | .3448 | .3448 | .3449 | .0039 | .0038 12 | .9865 | .999 | .0135 | .989 | .994 | .005 | .009 | 4.523 | 4.5245 | .0015 | 4.404 | 4.406 | .002 | .3416 | .3411 | .0005 | .3448 | .3448 | .3457 | .0046 | .0037 EXHAUST-VALVES 2 | .967 | .978 | .011 | .968 | .978 | .010 | .0105 | 4.535 | 4.536 | .001 | 4.3835 | 4.3865 | .003 | .340 | .3395 | .0005 | .346 | .345 | .345 | .0065 | .0055 3 | .963 | .968 | .005 | .964 | .969 | .005 | .005 | 4.5355 | 4.5365 | .001 | 4.384 | 4.387 | .003 | .3405 | .340 | .0005 | .3462 | .3445 | .3447 | .0062 | .0045 6 | .979 | .980 | .001 | .977 | .982 | .005 | .003 | 4.536 | 4.5345 | -.0015 | 4.3845 | 4.3885 | .004 | .340 | .3399 | .0001 | .3455 | .3444 | .3452 | .0056 | .0045 7 | .966 | .973 | .007 | .966 | .972 | .006 | .0065 | 4.536 | 4.5375 | .0015 | 4.385 | 4.3885 | .0035 | .3405 | .3399 | .0006 | .344 | .3438 | .3442 | .0043 | .0039 10 | .969 | .976 | .007 | .971 | .977 | .006 | .0065 | 4.534 | 4.536 | .002 | 4.383 | 4.3875 | .0045 | .341 | .340 | .001 | .3442 | .3433 | .3438 | .0042 | .0033 11 | .972 | .977 | .005 | .971 | .975 | .004 | .0045 | 4.535 | 4.537 | .002 | 4.384 | 4.3885 | .0045 | .3405 | .340 | .0005 | .3441 | .3435 | .3442 | .0042 | .0035 DIAGRAMS & STAMP: JOINT FACE, A, B, 1, 2, INLET, EXHAUST LENGTH 'C', LENGTH 'D' E, F, G ROLLS ROYCE LTD. 4 NOV 35 DERBY Ex.I.69 | ||