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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).
Inter-office correspondence about using a hot spot to improve induction pipe performance for better acceleration.

Identifier  ExFiles\Box 50\3\  Scan129
Date  3rd August 1921
  
H.R.A. 25 25m. 12-20-20 40849
X4305
INTER-OFFICE CORRESPONDENCE

ROLLS-ROYCE
OF AMERICA, INC
SPRINGFIELD, MASS.

CC Mr. Belnap
Mr. Nadin

Oyll - G 3821

August 3, 1921

X4305

Dear Hives:

Re: Induction Pipes

It has just occurred to me that with an effective hot spot it might be necessary for best acceleration to reduce the air friction lag in the extra air valve.

The lag in this valve serves the purpose of supplying a lot of wet fuel to the induction pipe in sudden opening up sufficient to coat the walls of the pipe and still supply a firing mixture to the cylinders.

Any effective device which largely served to keep the gas off the walls, would reduce the necessity for this extra rich mixture. If the extra rich mixture were allowed to enter the pipe, it might, with a hot spot, choke the engine from over-richness.

OY. M.{Mr Moon / Mr Moore} Olley
  
  


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