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).
Technical note detailing observations on piston design, including Cadillac's experimental findings and issues with T-slot pistons and rings.
| Identifier | ExFiles\Box 173\2\ img080 | |
| Date | 19th February 1934 guessed | |
| Frame when used with either the split- or conventional front axle. Pistons. Cadillacs as you know went to alum pistons this year, and having 35 experimental cars were able to run one third of a million miles in four months to get information. They found 1) That on the T slot piston, they were not able to run with a non-interference fit unless they clamped one end of the gudgeon pin with a screw. The difficulty they encountered was a rattle in the engine about 50 M.P.H. I suspect that we may be getting the same thing and cabled you accordingly. 2) That they had to make their rings give higher unit pressure than ours to avoid blow by.{R.W. Bailey - Chief Engineer} They run .0435 - ring depth per 1" of dia with a free gap opening of .170 per 1". They have a very excellent device for checking the uniformity of the radial ring pressure against the [Text in left margin]: Faced lead xref reduces the effect when spalled onto the seizing in the piston Use a special electric furnace cast iron to stand up to the stresses | ||