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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).
Radiator tube manufacturing methods and the viability of brass radiators in the United States.

Identifier  ExFiles\Box 149a\3\  scan0035
Date  27th July 1920 guessed
  
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1. By an extruding or squirting process, similar to that used for tooth paste tubes.

2. By wrapping from strips forming a longitudinal seam and sweating this up in a further operation.

The latter method is used in the Fedders radiator, which is standard on the Pierce Arrow Co. and a number of other first class cars.

We cannot yet find any maker of individual drawn brass tubes such as are used in the English car.

The engineer of the United States Cartridge Co. who claim to be the only makers of seamless tubes for honeycomb radiators in the United States, now informs us, and assures us, that he can give us proof to as great an extent as we desire that brass radiators are practically unusable in the Western States, and that a large proportion of the business of the United States Cartridge Co., has been supplying radiators for the Ford and other cars which fit brass strip radiators which have corroded when placed in use in the Western States.

We may add that the United States Cartridge Co. does make extruded brass tubes, but not the sizes and thin walls which we require.

They say, however, that they are unwilling to undertake making brass tubes for us because they feel that it would be a mistake.

I am intending to write to various engineers in this country to get their confirmation of this, but I have
  
  


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