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 hydraulic unit valve rocker for a 3½ Litre Bentley.
| Identifier | ExFiles\Box 88\4\ scan0096 | |
| Date | 2nd September 1934 | |
| FRANK B. HALFORD REF. N.º JOB: 3½ LITRE BENTLEY MESSRS ROLLS ROYCE LTD. DERBY TITLE: HYDRAULIC UNIT - VALVE ROCKER, 3½ LITRE BENTLEY PART NUMBER: SK. 4437. DATE: 2.9.34 DRAWN CHECKED PASSED DO NOT SCALE PRINTS. f MACHINE G GRIND ∞ M/C ALL OVER MATL. Nº OFF. BOT.AS. MOD.Nº DATE OF INCORPN. OF MODIFICATION DRG. Nº CLASS MODIFICATION DATE SIGN SUPPLEMENTARY TO SK. NS{Norman Scott} 4394. LIFT OF BALL = .028" APPROX LATERAL FLOAT OF BALL = .004" (Total) SCALE - F/S. Alloy Plug G.T.D. 130 Undercut to Drg. A.S.1768. .02 Chamfer at 45° 5/16 DIA .104 Dia 9/32 Sq. R (at 90°) 3/64 Cham. at 45° .125 Dia .218 Dia .600" R Spherical 25/64" DIA. 11/32 MAX BORE. BINDERS REQD. | ||