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).
Blueprint for a modified cylinder core vent for the Wraith II model.
| Identifier | ExFiles\Box 8\6\ 06-page10 | |
| Date | 17th September 1937 | |
| E-CD-90. WE UNDERSTAND THAT A 3.500 DIA. FACE CUTTER IS AT PRESENT USED FOR MACHINING JOINT FACE OF BLOCK, WHICH MEANS THAT A SMALL DIAMETER FACE CUTTER MUST ALSO BE REQUIRED FOR FINISHING FACE BETWEEN BARRELS. THIS ALTERATION DOES NOT THERE-FOR CALL FOR ANY ADDITIONAL MILLING OPERATION. 5 INVERTED PLAN 6 4 BOSSES THUS THE CORE PLUGS & THEIR BOSSES HAVE BEEN LOWERED .100. TO FACILITATE RE-MOVAL OF SCREWING UP FEATURE FROM PLUGS .500 RAD THIS ALTERATION APPLIES TO LE.C.5778. IT SHOULD ALSO BE MADE TO PRODUCTION 25/30 H.P & BENTLEY II BLOCKS & ALSO LE.C.5717. MODIFIED CYLINDER CORE VENT - WRAITH II- SCALE 1/1 A H McKay. 17/9/37 ROLLS-ROYCE, LTD: PRINT ROOM SEP. 20 1937 E-CD-90 | ||