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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).
Requirements for experimental Hall's bushed big end bearings, including specifications for different metalling materials.

Identifier  ExFiles\Box 115\3\  scan0085
Date  3rd November 1937
  
To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
c.c. to H1.

1020

Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}3/AP.3.11.37.

Ph.III. BEARINGS.

Further to the 2 sets of Hall's bushed big ends which we have instructed for J6-IX. (No.11.unit) and J2-IX. (No.1. unit), 2 more sets are required for our experimental use as follows, otherwise are to EX.28737/8.

(1) Both sets to have Centricast A.C.6. Hall's bushes.
(2) One set to have the outside blade rod bearing surface whitemetalled in Eleven H.{Arthur M. Hanbury - Head Complaints} material and the other set in Std. R.R. W/M.{Mr Moon / Mr Moore} The Eleven H.{Arthur M. Hanbury - Head Complaints} material which has the following analysis can be made up in our laboratory and is reputed for its adhesive qualities on outside bearings.

Copper 2%
Antimony 9%
Cadmium 2.4%
Tin balance.

It is proposed to try 3 of each type of metalling in our endurance engine and upon the results incorporate the spare set in No.14 unit (15,000) which at present has shim location of Hall's bush big ends.

Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
  
  


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