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).
Piston design improvements, including slipper surfaces and weight, for the Condor engine.
| Identifier | ExFiles\Box 77\1\ scan0012 | |
| Date | 28th January 1920 | |
| Contd. -3- piston (3,200 lbs.) but nevertheless it is thought that the Ricardo should have someadvantage in weight as the material appears to be used more efficiently. (9) The slipper surfaces should be shaped as shewn in the diagram, firstly, to avoid wearing away the cylinder along a distinct line, and secondly, to avoid breakage of the lower corners. As regards the length proportions of the slipper surfaces, Mr. Royce points out that they have been lengthened below the piston pin on the model, but the surface has been balanced up by being made wider at the top than at the bottom, and being drilled out at the bottom so as to obtain approximately uniform pressure. He would like this point to receive some attention in our design for the "Condor". E.{Mr Elliott - Chief Engineer} | ||