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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. PRINT 4 NOV 35 DERBY Ex.I.69

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).