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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).
Test results for ignition wires for tank engines, comparing voltage performance with and without a screen.

Identifier  ExFiles\Box 163\2\  img065
Date  2nd August 1938
  
RR 239 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12 44) MP 306975
x6008
(1
ROLLS-ROYCE LTD.
INSTRUCTIONS.
To: WST
Date: 2/8/38
Order No.
Customer's No.

Ignition Wires for Tank Engines

Two sets of ignition wires, Type L & Type SR, were tested under a constant pressure of 100 lbs/". the voltage measured both with & without the screens, resulted in the following.

| TYPE | VOLTAGE WITH SCREEN | VOLTAGE WITHOUT SCREEN | % DIFFERENCE |
|---|---|---|---|
| L | 5900 | 5090 | 14 7/9 % INCREASE WITH SCREEN |
| SR | 5500 | 4840 | 19.0 % INCREASE WITH SCREEN |

Signed: A.W. Woodall

This Sheet must be filed on completion of the work.
  
  


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