For generations of pilots, the Piper J-3 Cub is the object of nostalgic affection. The importance of the J-3 in aviation history is a noteworthy one. The cub was originally intended as a trainer -- more than 75% of all new pilots in the CTP (Civilian Training Program) were trained in Cubs. By war's end, 80% of all U.S. military pilots received their introduction to flying in Piper Cubs. The aircraft's standard chrome yellow paint has come to be known as 'Cub Yellow.'