Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Letter to Claude Johnson regarding tests on engine starting aids, including a choker scheme.

Identifier  ExFiles\Box 20\6\  Scan052
Date  5th March 1921
  
Cy4 - G 5321

March 5, 1921

Mr. Claude Johnson - Sheet 2.

We have never had pre-ignition with this device.

(3) Hot air taken through one exhaust box to the low speed jet alone has been tried by Mr. Hives during his visit. The effect, when a cold induction pipe was used, was not marked.

Exhaust heat to the throttle was tried also, and was not in itself a solution of the difficulty.

(4) The choker scheme has been tried on 4-EX with great success, and reported on in our letter of March 3 on "Ease of Starting".

A sketch has also been sent to Mr. Hives of this device.

The car with the choker can be started by hand with the greatest ease on a cold morning after a zero night, by simply filling with fairly warm water and notching the engine over 3 or 4 times.

Yours truly,
ROLLS-ROYCE OF AMERICA, Inc.
Per M.{Mr Moon / Mr Moore} Olley

COPY

MO/G
CC Mr. Nadin
Mr. Bagnall
Mr. Hulley
Mr. Southern
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙