Blueprint drawing of a Silver Ghost piston that was trialled in 1915.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan27 | |
| Date | 18th December 1925 guessed | |
| [ "SILVER GHOST(1907 40/50 historic RAC 15,000 miles trial) PISTON.", "THIS PISTON WAS TRIED IN 1915.", "TURN 4.513 DIA PARALLEL", "4.155 DIA FOR ALL GROOVES +0 -10", "3.900", "4.500 DIA", ".175 RAD", "72°", ".175 RAD", ".225 ±5", "4.300", ".062 +10", "4.255 +0 -10", "3.787 +55 -05", "2.875 ±10", "1.500 ±5", "DRILL .267", "1.500 DIA", "E", "F", "1.500 DIA +25 -0", "3.106 ±1", ".050 RAD", "2.250 +10", "2.825 +10", "1.650 ±2", "4.300 DIA -25", "REAM .250 DIA +1", ".125 RAD", ".075 RAD", ".225 RAD", ".425", ".250", ".225", ".430", ".075", "3.531" ], | ||
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).