Applebay GA-111 Mescalero
The Applebay GA-111 Mescalero is an American high-wing, T-tailed single-seat, FAI Open Class glider that was designed by George Applebay. == Design and development == The Mescalero was designed by Applebay in response to the Soaring Society of America's 1970 Sailplane Design Competition.
Source: Wikipedia — Applebay GA-111 Mescalero (CC BY-SA 4.0)