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Refrigeration played a part in the carefully planned flight of the giant China Clipper to Manila, initiating a new air route to the Orient. Refrigeration stations had to be set up at the ports of call along this route which are being touched by this ship and its sister, the Philippine Clipper. The first two of these stations were on Midway Island and Wake Island, and at present, equipment is being installed at Guam. The refrigeration requirement was not large at each point, on the order of five tons at 35 deg. F., but climatic conditions were exacting and no local facilities were at hand at all. Refrigerators are among the largest to be factory built in their particular manner. Constructed in the C. V. Hill factory in Trenton, N. J., each section was encased in galvanized iron on both sides, in order to withstand attacks by tropical insects. The basic construction is of wood, with a waterproofing layer under the sheathing. The insulation was of eight layers of Alfol (aluminum) in the crumpled form, occupying a space 4 in. thick. There was 2o,ooo sq. ft. used. This was specified not only for thermal reasons but on account of the light weight and for general economy. To complete the job the boxes were knocked down and shipped to their destinations. These boxes have three compartments each, designed for temperatures of 34 to 36 deg. F. Each has two 2-ton Brunswick compressors using methyl chloride in Bush finned coils, fed with thermal expansion valves.
R. H. O.
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