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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).
Octane rating of a fuel sample for the Exp.111 engine.

Identifier  ExFiles\Box 27a\4\  Scan100
Date  21th April 1933
  
X1282.

To Lp.{Mr Lappin} From Hs.{Lord Ernest Hives - Chair}

Hs.{Lord Ernest Hives - Chair}2/MJ.21.4.33.

Dear Lp.{Mr Lappin},

Thanks for your note with regard to the fuel on Exp.111 engine.

A sample of this fuel was sent by the A.I.D. to Kidbrooke. We have their report to say that it comes up to the specification for D.T.D.134 but it is on the low limit. The limit I believe is between 74 - 77 octane, and the sample submitted was 74 octane.

Hs.{Lord Ernest Hives - Chair}
  
  


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