Schreder HP-13
The Schreder HP-13 is an American high-wing, single seat FAI Open Class glider that was designed by Richard Schreder.
Design and development
The HP-13 was a developmental milestone aircraft between the HP-11 and the later HP-14. The HP-13 was designed by taking the fuselage of the HP-11 and wings similar to the HP-12, featuring the same Wortmann FX 61-163 airfoil but extended from the HP-12's FAI Standard Class span to for the open class. Eight HP-13s were completed.The HP-13 was later developed into the HP-14 by designing a new fuselage for the wings. The HP-14 was later type certified in the United Kingdom, while the HP-13s were all amateur-built.