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 machined part with drilling, reaming, spotfacing, and tapping instructions.
| Identifier | ExFiles\Box 13\3\ 03-page288 | |
| Date | 3rd January 1928 guessed | |
| V1010 TO BE JIG DRILLED DRILL & REAM 2 HOLES B.312 DIA .990 ±2 SPOTFACE TO ABOVE DIMENSION .898 TAP & PLUG 2 HOLES SHOWN FOR OTHER DIMENSIONS SEE E 81437 SECTION D.D. MODIFICATION SLOW RUNNING P II A / H-31 | ||