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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).
Letter from English Racing Automobiles discussing test results of an aluminium tin alloy for bearings.

Identifier  ExFiles\Box 116\3\  scan0058
Date  26th October 1937
  
ENGLISH RACING AUTOMOBILES Lᵀᴰ
BOURNE LINCS
TELEPHONE BOURNE 121
DIRECTORS H.W. COOK, RAYMOND MAYS, PETER BERTHON
OUR REF. PB/JB.
DATE 26th October, 1937.

Handwritten: 1020a SG{Arthur F. Sidgreaves - MD} file

MANUFACTURERS OF
"E.{Mr Elliott - Chief Engineer} R.{Sir Henry Royce} A.{Mr Adams}" RACING CARS
MURRAY JAMIESON SUPERCHARGERS
AUTOMOBILE RESEARCH ENGINEERS
E.R.A. CARS ARE DRIVEN BY STAFF ONLY AT CUSTOMERS' OWN RISK

Messrs. Rolls-Royce Ltd.,
DERBY.

Dear Sirs,

For the attention of W. A.{Mr Adams} Robotham, Esq.

We have now had an opportunity of testing out your aluminium tin alloy. So far tests have been confined to big end bearings and as yet we have obtained no results with this material when used for main bearings.

As big end bearings we have found this material to be extremely satisfactory, and although the time running has been relatively short, it has shown quite conclusively that this material is far superior than anything we have tried from a load carrying point of view. We find that there is a considerable tendency to surface score, and from this point of view the material seems to be very much more sensitive to small particles of dirt. We have assumed that this can be overcome by improving the oil filtering conditions, and this work we are at the moment carrying out with a view to running a further test.

In the meantime we should very much like to know if you would be prepared to let us have sufficient material to cover our racing requirements for next season, and since it appears to stand up so satisfactory under our particular conditions, we consider it the obvious solution to our bearing problems in the future.

Yours faithfully,

ENGLISH RACING AUTOMOBILES LTD.

[Signature]

Director.

AND AT BROOKLANDS TRACK, WEYBRIDGE, SURREY
  
  


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