What this guy was posibly looking at might have been a turbine Ag-Cat , with your past ag flying i know you know what they look like, P.S. my father is a retired cropduster of 32 years. started out in Stearmans, & went on to Ag-Cats also has worked with Piper Pawnee's & Cessna's Ag Husky's & Ag wagons no turbines though,