First flown in 1974, the HP-18 was available in kit form in 1975, and in 1976 was featured in a series of six articles in Soaring Magazine that described every detail of its construction. In the spirit of the Popular Mechanics article from which Schreder built his first glider at age 9, the Soaring articles reproduced the HP-18 plans and assembly instructions in sufficient detail for a resourcful and mechanically-inclined individual to build the aircraft almost from scratch. However, most builders found it easier to purchase the HP-18 kit and its full-size plans from Bryan Aircraft.
