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 material for Wraith engine connecting rod bearings from R.R.56 to a new A/T aluminium tin alloy.
Identifier | ExFiles\Box 115\1\ scan0315 | |
Date | 9th April 1937 | |
E.Dept. (crossed out) c.Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} (crossed out) c.E (crossed out) c.Ws/TB. (crossed out) 1020 (handwritten) Hives out (handwritten signature) BY/EM.17/J.9.4.37. WRAITH ENGINE CONNECTING ROD BEARINGS. ------------------------------------- We understand that drawing EB.3219 has been issued for the connecting rod bearings for the above engine showing the bearings in R.R.56 Aluminium Alloy. In discussion with Gry.{Shadwell Grylls} it is agreed that the R.R.56 material for bearings is not now considered satisfactory and no further work is being done with this alloy as a bearing material. Under the circumstances therefore, will you kindly arrange to alter material from R.R.56 to Hl's aluminium tin bearing alloy which we have given the symbol of A/T. The particulars of heat treatment etc. should be exactly the same as the present standard Bentley Bearings. BY/EM. (signature) | ||