High Quality Content by WIKIPEDIA articles! The Grob G 109 is a light aircraft developed by Grob Aircraft AG of Mindelheim Mattsies in Germany. It first flew in 1980. It is a two-seat self-launching motor glider in which the pilot and passenger or student sit side by side, with good visibility provided by large windows. As well as normal civilian use this aircraft is now used in Volunteer Gliding Squadrons by the Royal Air Force to train Air Cadets through the Gliding Induction and Gliding Scholarship courses. The Grob 109B is known in RAF service as the Vigilant T1.