Rough sketch showing a plan view of ports in the operating chamber for an Eagle XX & Speed Gear.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan277 | |
| Date | 31th August 1925 | |
| EAGLE(Aero Engine) XX & SPEED GEAR ROUGH SKETCH SHEWING PLAN VIEW OF PORTS IN THE OPERATING CHAMBER. Fig. I A, B, C & D ARE THE PORTS, E = THE PISTON, PORTS B & C ARE CRESCENT SHAPED DUE TO BEING CAST ON AN ANGLE, PISTON IS MOVING IN THE DIRECTION OF ARROW, WHEN PISTON. E. {Mr Elliott - Chief Engineer} SHOULD BE COVERING PORTS B or C, THE SHADED PORTIONS X, Y, Z ARE UNCOVERD SO THAT THE OIL ESCAPES DOWN X & Y UNDER E & OUT AT Z, THENCE TO THE TANK BY WAY OF PORT. C SPS 31-8-25 | ||
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).