 3 Grob109A's were converted on the G109Ar.The Aero Club Valkenburg still has 2 of these, the ph-710 and ph-835.Developed out of the Grob G 109A; the wingspan was further increased to , the one-piece canopy of the earlier versions was replaced with opening doors, and the main landing gear was moved rearwards to ease weight on the tail wheel.