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 detailing modifications to the oil grooves of a connecting rod big end bush for the Spectre engine.
| Identifier | ExFiles\Box 93\1\ scan0113 | |
| Date | 3rd August 1935 | |
| THIS MODIFICATION APPLIES TO THE 'STRAP TYPE ROD' TO L.E.C. 3860. THE CIRCULAR OIL GROOVE HAS BEEN ADDED TO IMPROVE THE LUBRICATION OF THE BLADE ROD BIG END & ALSO BOTH SMALL END BEARING. THE TWO TRANSVERSE GROOVES ARE NOW ONLY CARRIED TO ONE SIDE OF BEARING INSTEAD OF BEING CUT EQUAL EACH SIDE OF ¢. E OF FORKED ROD WHITE METAL OR LEAD-BRONZE LININGS CIRCULAR & TRANSVERSE OIL GROOVES TO BE .125 WIDE x .020 DEEP. CONNECTING ROD BIG END BUSH - MODIFIED OIL GROOVES - SPECTRECodename for Phantom III - SCALE ½ M.A. Ellory 3/8/35 L.E.C. 4624 | ||