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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).
Proposal for material changes to an altitude control valve for carburetters, specifying Brinell hardness.

Identifier  ExFiles\Box 38\1\  Scan034
Date  7th November 1918
  
R.R. 235 B (200 T) (S.E. 427, 21-2-18) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2129

RECEIVED

Mr Hargreaves from BY.{R.W. Bailey - Chief Engineer}
Mr Clough.
Mr Ormerod.
c. EH.
c. EFC.

November 7, 1918.

BY20/KP71118.

8 NOV 1918
X3
CARBURETTERS.
ALTITUDE CONTROL VALVE X.3406.

Will you kindly note that for the altitude control valves I propose that we should use stainless steel for the valve and phosphor bronze or hard drawn brass for the seating.

Will Mr Hives kindly make a new needle valve to the above under the X number quoted at the head of the sheet. As soon as he reports that the material can be readily machined and that he considers it as satisfactory, the D.O. will then incorporate same as standard.

The Brinell figure to which the valve should be made is 277 - 296.

BY.{R.W. Bailey - Chief Engineer}
  
  


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