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 Phantom piston with an additional sawcut.
| Identifier | ExFiles\Box 48\1\ Scan189 | |
| Date | 28th August 1928 | |
| [ "1.500", "1.175 CTRS.", "SAWCUT .050 WIDE", "4.250 DIA.", "SECTION A.B.", "FOR ALL OTHER DIMENSIONS SEE DRAWING E73376.D.C.", "SCALE 1/1.", "PISTON WITH ADDITIONAL SAWCUT.", "(PHANTOM)", "RDL NO. FLOWER", "PISTON NO.", "13 SEP 1928", "JMA 28.8.28" ], | ||