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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).
Instructions for testing and fitting new Delco-Remy horns to chassis 39-EX.

Identifier  ExFiles\Box 166\9\  img057
Date  15th March 1937
  
6066
To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Wst.
c. to Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}
c. to Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}
Rm{William Robotham - Chief Engineer}/wst.5/AP.15.3.37.
New Type Delco-Remy Horns.
We have received for test a pair of chromium plated horns similar to the Lucas, from the Delco-Remy Company.
These horns are lighter than the Lucas and take less current to operate, but they are not arranged with the loud and soft tone which is a special feature of the Lucas Horns.
Will you please arrange to fit these horns to chassis 39-EX. arranging to wire them direct to the steering column switch, not using the Lucas relay switch at all. Instead of the Lucas switch the Delco-Remy relay should be used as shown on a diagram which we can hand to T.T. when he is ready to do the wiring.
Rm{William Robotham - Chief Engineer}/Wst.
  
  


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