This 3D model was originally created with Sketchup 8 and then converted to all other 3D formats. Native format is .skp 3dsmax scene is 3ds Max 2016 version, rendered with Vray 3.00 The Schleicher K7 Rhönadler, aka Ka-7 or K-7, is a West German high-wing, two-seat, glider that was designed by Rudolf Kaiser and produced by Alexander Schleicher GmbH %26 Co.After 550 had been built, the K7 was superseded in production by the Schleicher ASK 13. https://en.wikipedia.org/wiki/Schleicher_K7