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).
Sketch of an experimental piston for Phantom 8 Litre and Bensport engines.
| Identifier | ExFiles\Box 148\3\ scan0079 | |
| Date | 16th June 1933 | |
| H.S.1044 SKETCH OF EXPERIMENTAL TYPE OF PISTON FOR PHANTOM 8 LITRE & BENSPORT ENGINES. TAPER C D E F G H L K B A DIMENSION | A | B | C | D | E | F | G | H | K | L PHANTOM 8 LITRE | 4.357 -I | 3.300 ±.060 | 4.350 -I | 4.355 -I | 4.355 -I | 4.355 -I | 4.355 -I | 4.355 -I | 0.475 ±15 | 0.250 ±15 BENSPORT | 3.237 -I | 2.500 ±.060 | 3.230 -I | TAPER | TO | -- | -- | 3.235 | 0.400 ±15 | 0.250 ±15 C.S. STEADMAN 16-6-33 | ||