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).
Recommending the use of Z.3 aluminium die-casting alloy for the Wraith bottom half.
| Identifier | ExFiles\Box 142\4\ scan0077 | |
| Date | 27th January 1937 | |
| Hs.{Lord Ernest Hives - Chair} from Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} c. to E.{Mr Elliott - Chief Engineer} c. to Ey. c. to RHC.{R. H. Coverley - Production Engineer} 1202 Rm.{William Robotham - Chief Engineer}6/R.27.1.37. DIE CASTINGS. With reference to the attached report Rm{William Robotham - Chief Engineer}/Smth 10/AP.27.1.37., our immediate recommendation is that as soon as we have decided on the final form the Wraith bottom half shall take, it should be produced by means of a die casting in Z.3 alloy. This is a Birmingham aluminium die-casting alloy. Unless we hear to the contrary, we shall proceed on these lines. Preliminary testing will be carried out on L.5 No.6 sand castings, a rather weaker combination than that specified above. Rm.{William Robotham - Chief Engineer} | ||