Blueprint with a cross-section view and manufacturing instructions for a component with ring grooves, likely a piston.
| Identifier | ExFiles\Box 173\3\ img034 | |
| Date | 2nd June 1934 guessed | |
| SIDES OF RING GROOVES MUST BE SMOOTH, FLAT, & RUN TRUE WITH SKIRT O.D. - THE BOTTOM OF GROOVES MUST BE SQUARE WITH THE SIDES .1255/.1265 .125/.126 .1875/.1885 GRIND CHAMFER 1/16 SAW - 2 SLOTS BEFORE FINISH GRINDING BREAK CORNER 3.233/3.237 CAM GRIND BREAK CORNER 1/64 MAX. R. {Sir Henry Royce} DIA. O.DIA. 7/32 3/64 15/32 5/32 1/2 5/16 23/32 7/8 21/32 2.755/2.765 | ||
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).