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).
Alfa-Romeo crankshaft at 1/2 scale.
| Identifier | ExFiles\Box 124\5\ scan0067 | |
| Date | 28th February 1942 | |
| DETAILS OF ALFA-ROMEO CRANK-SHAFT SCALE 1/2 THROW 1.728" = 44 M/M STROKE 3.456" 6 SPLINES 1.337" DIA x 1.101" DIA .275" WIDE DIMENSIONS TAKEN FROM THIS FACE OIL LEAD .156" DIA 6 LARGE END BEARINGS 1.653 DIA .109" HOLE 3 BEARINGS 'Y' SECTION ON WEB 'A' SECTION ON WEB 'B' RAD. 1.000" RAD. .500" 2.750" RAD. WEB DIA. SECTION ON 'C' LOOKING IN DIRECTION OF ARROW CHAMFER .030" SUPER-CHARGER COUPLING SECTION 'D' ENLARGED VIEW OF TOOTH 5 BALANCE HOLES .312 DIA X .625 DEEP 26 TEETH EQUALLY SPACED .575" WIDE. UNDERCUT AT BACK 2.775" DIA X .200" 1.187" RAD 1.375" RAD 1.800 DIA S.E. & C. Co. LTD. 29 FEB 1942 | ||