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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).
Response regarding leaky radiators, detailing improvements made to the suspension system and comparative test results.

Identifier  ExFiles\Box 78\3\  scan0104
Date  29th January 1915
  
Wor{Arthur Wormald - General Works Manager}/Mor32/J29115.

Re. Leaky Radiators.

BJ. 29.1.15.

In reply to your letter BJ13/IW28115, we wish to first of all point out that, of course, Mr. Salamanca is quite wrong in his assumption that although realising a defect in our radiators, we were not making any endeavour to rectify its faults. As a matter of fact Mr. Royce, Drawing Office and Experimental Dept. were many months busily working on this problem, and the whole position has been brought to a very satisfactory conclusion.

The first improvement that we made was to use a suspension which had the effect of distributing the load on a larger area of the matrix.

The old standard radiator when tested by the pumping rig commenced to leak after 2 1/2 hours, and at the end of 8 hours 10 minutes there were no less that six leaks in evidence.

The [handwritten: new] suspension increased the time to 11 hours 35 minutes before the first leak, showing 4 1/2 times increase in the length of life.
  
  


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