Cylinder distortion tests for Spectre & J. III engines, focusing on centricast iron liners.
| Identifier | ExFiles\Box 93\4\ scan0011 | |
| Date | 18th February 1935 | |
| To: E.P. from RHC. {R. H. Coverley - Production Engineer} c. Hs. {Lord Ernest Hives - Chair} c. [REDACTED] c. [REDACTED] 7319 RHC. {R. H. Coverley - Production Engineer} 4/MS18.2.35. SPECTRE(Codename for Phantom III) & J. {Mr Johnson W.M.} III. CYLINDER DISTORTION TESTS. Dimensions of Cylinder bores taken with hot and cold water in jackets - Hot water at 80°C. Cold water at 20°C. SPECTRE(Codename for Phantom III) NO. 2. UNIT - CENTRICAST IRON LINERS From the dimensions of cylinder liners measured in position under the conditions stated, it was observed that although the liners expanded to some extent at all points when heated, most of the expansion took place above and below the gland rubbers, the crowns shewing the greatest variation. The glands, having a restraining effect on the liner, help to keep the bore to the normal size at that point. It is also noticeable that the bores become oval at and above the glands when hot, the ovality being .0005" average, with the maximum dia. at right angles to the Crankshaft. [Diagram Labels] CROWN GLAND RUBBER SECTION SKIRT EXAGGERATION OF HOW BORES TEND TO BECOME WHEN HEATED continued. | ||
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).