 In 1956, Schreder built the HP-7 and flew it to a fourth-place finish in that year's US National Championship contest.The HP-7 was quickly followed by the HP-8, in which Schreder flew to victory in the 1958 US Nationals in Bishop, California.Schreder also used his HP-8 to establish speed records over 100, 200, and 300 km courses.