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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).
From Mr. Royce enquiring about the performance of multi-ring pistons in aero engines during a nose dive.

Identifier  Morton\M8\  img017
Date  15th June 1917
  
E - Poetic, Honomy?
To EH. from E.{Mr Elliott - Chief Engineer}
ORIGINAL
E5/B13:6:17.
5
X 2209. X 2369
X 2809. X 2749
Re Pistons.
We have been previously informed by you that multi-ring pistons are good for slow running so far as chassis work is concerned..
Would you kindly note that Mr. Royce would like to know if these same pistons have the additional virtue of not oiling up during a nose dive from a high altitude on aero engines.
E.{Mr Elliott - Chief Engineer}
D
RECEIVED
15 JUN 1917
  
  


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