The Brewster Aeronautical Corp. of Long Island City is among the most substantial U.S. production fizzles of World War II. Earlier in the war, Brewster made a fighter plane, the Buffalo, that got into action in the Far East before Java and Singapore fell. By 1942 it had converted to making the Buccaneer, a not-so-hot dive-bomber, and is about to start making the Vought Corsair, an excellent Navy fighter. But the biggest trouble is not with the quality of Brewster planes, but with the quantity, which is a very meager military secret....