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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).
Query regarding the detonation properties of Anglo-Persian BP petrol compared to Shell and possible remedies.

Identifier  ExFiles\Box 20\6\  Scan092
Date  9th November 1926
  
To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce}

X. 985

R6/M9.11.26.

RE. ANGLO-PERSIAN BP. PETROL.

We are interested in this because it is a
British Co., but I understand their standard spirit is more
prone to detonate than say Shell. Is this so? Can it be
cured by adding some other kind (blending), or by dope -
salts of lead, etc. My friend is interested as a shareholder,
and well known to the directors.

Can you let me have a report of your experience,
and the usual cure.

R.{Sir Henry Royce}
  
  


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