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).
Cylinder distortion tests for the Spectre & J. III engines, detailing the effects of heat on centricast iron liners.
| Identifier | ExFiles\Box 103\4\ scan0127 | |
| Date | 18th February 1935 | |
| To/Dr from RHC.{R. H. Coverley - Production Engineer} c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 45050 RHC.{R. H. Coverley - Production Engineer}4/MS18.2.35. SPECTRECodename 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. SPECTRECodename 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. CROWN GLAND RUBBER SECTION SKIRT EXAGGERATION OF HOW BORES TEND TO BECOME WHEN HEATED continued. | ||