The Gehrlein GP-1 is an American mid-wing, single seat FAI Standard Class glider that was designed by Jay and Rod Gehrlein and first flown in July 1968.
[1][2] When their father, glider pilot Larry Gehrlein was on an extended vacation, his two sons, Rod and Jay decided to design and build a new glider as a surprise for his return.
The wing is of a constant 30 in (76 cm) chord and employs a Wortmann FX-61-184 airfoil.
Glide path control is via a set of scissor-type spoilers and air brakes.
[3] Data from Sailplane Directory and Soaring[1][2]General characteristics Performance