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).
Drawing of an inlet valve for a high power head.
| Identifier | ExFiles\Box 158\4\ scan0242 | |
| Date | 13th July 1935 | |
| B10430 THE ASSOCIATED EQUIPMENT Co. LTD. SOUTHALL, MIDDLESEX. A 10417 DRAWING NOT TO BE SCALED. ALL GOODS MUST BEAR OUR PART No., OUR DATE LETTER AND MAKER'S TRADE MARK. ALTERATIONS OLD PART N° U.48986 & VARIOUS ALTERATIONS MADE 30.6.31 1) I-1551 13.8.31 2) I-1621 26.9.31 3) I-1796 6.2.32 4) I-1999 28.7.32 5) I-2166 19.1.33 6) I-2189 10.2.33 7) REDRAWN. SAME N°. CENTRE AND SLOT REMOVED FROM HEAD I-2851 28.2.34 8) CUT LENGTH FROM 12 7/8" I-2851 3.5.34 9) WIDTH OF HEAD REDIMENSIONED 2.5 TO 3.4 TO SUIT. I-2918 1.6.34 10) TIP & OVERALL LENGTH INCREASED M/M.{Mr Moon / Mr Moore} DIM FROM 25 TO 14.5. CENTRE DRILL 'B' SIZE ADDED TO VALVE HEAD. LIMIT ON OVERALL LENGTH FROM +-25 TO +-10. I-3452 7.6.35 11) CUT LENGTH FROM 12 7/8". I-3548 13.7.35 END TO BE GROUND SQUARE & CENTRE REMOVED PORTIONS TO BE POLISHED & FREE FROM TOOL MARKS 25 M/M.{Mr Moon / Mr Moore} RAD ON EDGE. USE 'B' SIZE CENTRE DRILL. DIMENSIONS: 10 -.076/-.100 DIA. FOR FULL LENGTH 5 CHAMFER AT 45° 25 +- .05R 8 DIA +0/-.013 45° 4 DIA. 60° 1/8" DIA. 52 +- .10 DIA. 7R 40R 90 +- .10 3.4 +0/-.10 146 +- .10 25 6 7 H.T. N° 34A BRINELL N° NOT HARDER THAN 269 IMPRESSION DIA 3-7 VALVE / INLET. (HIGH POWER HEAD) DRAWN TRACED PDR CHECK'D NH-L PASSED DATE 19-4-34 ST.{Capt. P. R. Strong} 0512 ⊕ MACHINED ALL OVER f MACHINED G GROUND NEWALL STANDARD LIMITS ARE USED ONLY WHERE LETTER SYMBOL GIVEN B FOR HOLES D DRIVING FIT P PUSH FIT F FORCE FIT X RUNNING FIT MACHINED DIMENSIONS WITHOUT LIMITS TO BE WITHIN + OR - 0.2 m/m OF GIVEN SIZE MATERIAL LIST No. 34 MODEL 661 No. OFF 6 PART N° T89 PART N° MADE FROM SILICO - CHROME STEEL 7/16 DIA 12 7/8 LONG 283-4 No. 11 A 10417 | ||