The aircraft was N123SX, the factory "Sport Acro" Sonex demo plane. The Sport Acro has larger ailerons and shorter flaps than the standard Sonex design to improve roll rate for aerobatics. The airplane was also the factory testbed for the Aerovee Turbo engine, a turbo-charged 2180cc 100hp VW conversion. The airplane had over 50 hours on the turbo engine, including cross country flight from Oshkosh to Lakeland for Sun 'N Fun.
NTSB is still conducting the investigation, no particular cause is known or suspected at this time. This is obviously a big shock to the Monnetts and the Sonex community. I personally knew Jeremy and spoke with him many times. He was a passionate advocate for Sonex and aviation in general. He was also a very good and ethical businessman who you could always count on to treat you in a fair and friendly manner. He will be missed.
