Blueprint detailing the valve hole for a 3.62 inch rim, part RSO549.
| Identifier | ExFiles\Box 159\3\ scan0099 | |
| Date | 29th September 1939 | |
| COPIED OR RE-ISSUED WITHOUT OUR PERMISSION 3.62" ± .063" 3.62" RIM R.S.0549. CHAMFER AT 45° 1/32 DEEP AT ℄ DETAIL OF VALVE HOLE 1/64 R. {Sir Henry Royce} 28° .504"/.514" DIA. .450" APPROVED 3.10.'39. DESIGN SHEET C171. SCALE:- 1/1 & 2/1 LIMITS - ON UNLIMITED DIMENSIONS +- .005" FOR DECIMAL FIGS. & +- 1/64" FOR FRACTIONAL FIGS. DRAWN: HR TRACED: CHECKED: DATE: 29.9.'39 A.M. APP. DATE D.M.C. TITLE:- VALVE HOLE FOR 3.62" RIM. RSO549. ISSUE No: MODIFICATION: COMPONENTS & MATERIAL SPEC. REF: DUNLOP RIM & WHEEL CO., LTD., FOLESHILL, COVENTRY. DRAWING No CDO3498. | ||
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).