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).
Cross-section design drawing for a die-cast chassis piston with annotations.
| Identifier | ExFiles\Box 35\2\ scan 026 | |
| Date | 26th April 1933 | |
| Die cast with heat well drawn centre & side piece collapsed. Suitable taper on diagonal webs. 8th Ring is in standard position LEC-1016 DROP RINGS .125 TO GET ENOUGH ROOM FOR TOP RING PIN .450 .225 DIAGONAL WEBS INCLUDED ANGLE ABOUT 60° RING PINS .350 .300 1.000 2.250 FOR WT ADJUSTMENT MACHINE OUT THIS SKIRT .150 FOR A HIGHER COMPN RATIO INCREASE THIS DIMENSION SOFT RING EXPANDED IN (Split ring) SET LIMITS FOR THE INTERNAL DIMENSIONS OF THIS PISTON WHICH INCREASES THE THICKNESS THE WALLS ETC THE TOLERANCES DIE CAST CHASSIS PISTON 26/4/33 | ||