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).
Changing the alloy for aero engine pistons from Y. alloy to RR.59.
| Identifier | ExFiles\Box 148\3\ scan0067 | |
| Date | 19th September 1930 | |
| Rg.{Mr Rowledge} c. Wor.{Arthur Wormald - General Works Manager} c. Hs.{Lord Ernest Hives - Chair} X4004 BY3/G.19.9.30. AERO ENGINE PISTONS. Whilst we must not under any circumstances change from Y. alloy to RR.59 without sufficient and adequate tests, and bearing in mind that we have tried on two previous occasions to get the RR.59 material (T.50 piston alloy) passed by type test and failed due to faults in the form of cracks, we certainly ought to make a further attempt, and I would suggest that Rg.{Mr Rowledge} approaches the Air Ministry with the object of ensuring that the two development engines are fitted with pistons in RR.59 material produced by High Duty Alloys and forged by dies which give the interior form of the piston practically to size in the die. This would mean a saving of approximately 2/- per piston. The figures quoted are based upon the actual figures quoted us, covering the dies and the production of pistons forged like the 'Jupiter' we saw in WOR{Arthur Wormald - General Works Manager}'s office. It is certainly anomalous that the RR. materials are being used by 'Jupiter' and have not even been passed a type test in our own Works. BY.{R.W. Bailey - Chief Engineer} RECEIVED SEP 19 1930 | ||