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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).
Typed memorandum discussing the performance and features of Delco Remy electric horns compared to Lucas horns.

Identifier  ExFiles\Box 166\9\  img065
Date  23th March 1937
  
6066
S/W.
Rm{William Robotham - Chief Engineer}/Wst.
Cx{Major Len W. Cox - Advertising Manager}4/KW23.3.37.

Delco Remy Electric Horns.

In reply to your Rm{William Robotham - Chief Engineer}/Wst4/AP22.3.37, you will no doubt get GWH{George W. Hancock - Head Chateauroux} to wire up these horns with the relay giving loud and soft effect. They worked all right on my car so far as the loud and soft notes are concerned, except that they were both in my view louder than the Lucas.

We certainly do not wish willingly to abandon the advantage of the soft note, which is very pleasant in towns and is one of the attractive features of the horns.

It does seem to me that Lucas could make a good job of these horns because when I came to W. on 2nd March to attend the Chassis Conference I had the horns on 3-AZ-38 changed for another pair of modified Lucas horns, and the ones fitted behaved exceedingly well throughout my tour and had very excellent notes. They went through rain and snow but they never ceased to function.

Cx.{Major Len W. Cox - Advertising Manager}
RWB
  
  


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