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).
Obtaining and testing different types of cylinder liners for the Japan III project.
| Identifier | ExFiles\Box 103\4\ scan0087 | |
| Date | 23th September 1931 | |
| RHC.{R. H. Coverley - Production Engineer} c. Hs.{Lord Ernest Hives - Chair} c. EY/SS.{S. Smith} c. EY/CS c. EY/EM 85050 BY.11/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 23.9.311 [Stamp: RECEIVED HC] JAPAN 111 - CYLINDER LINERS. ------------------------- In view of R's very insistent demand that we should obtain certain characteristics in the cylinder liners for Japan 111, and in the absence of any one cylinder corresponding with this requirements being available, we have had to arrange to test cylinders with varying properties. R.{Sir Henry Royce} required cylinders which (a) Had a high co-efficient of expansion. (b) With a hardened working surface. The former involves the use of austenitic steel, and the latter demands a steel which will take a hardened face under nitrogen treatment. We have obtained the following cylinders :- 1/- One set of cylinder liners in nimol iron plus 2% of chromium. 2/- One set of liners in nimol iron plus 4% chromium. 3/- One set of liners in their Mark 11 grade iron. 4/- One set of liners in nitrided cast iron. All of these cylinders are produced as centrifugal castings. Those referred to under heading (1) and (2) represent austenitic cast iron, with additions of chromium to give better working surfaces by producing a harder material. No. 3 is a hard material without the increased expansion of (1) and (2), which factor incidentally R.{Sir Henry Royce} considered important. No. 4 is a special nitriding cast iron, having ordinary cast iron coefficient of expansion, with a nitrogen hardened working face. These last we instructed to be supplied to us in the finished condition. | ||