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148 
No-fade Clain]. for New . Brake Linings
Page 55
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Pl.A . NEW type of metallic. brake lining, named Met-l-loy,. has been .developed in the IU.S. for heavy-dutycommercial vehicles by Firestone's World Bestos Co., and it is claimed to. give complete protection 'against brake fade. The exact composition of the lining is not revealed, but it is stated thatit can be 'installed in conventional brake assemblies with standard bolts or rivets. The' linings are said not to be brittle, and are available in all sizes for heavy vehicles. A future development will be linings suitable for light commercial vehicles and cars.
Tests carried out showed that a 40-ton combination could be stopped from 60 m.p.h., without brake-drum temperatures exceeding 266°C. (510°F.), at which temperature the co-efficient of friction stabilized. Over 100 large fleets, operating under a wide variety of conditions, field-tested the new lining, and not one case of brake fade r was reported. One driver on the West Coast reported that he stopped his outfit at the top of a 1-in-5.5 gradient and, with the brakes partially applied, drove down the hill at 60 m.p.h. When he thought the linings were " pretty well burned up," he applied the brake pedal further and found that maximum stopping capacity had not been reduced. The same linings are still in use 50,000 miles later.