This is My OA-40S STOL cargo aircraft. It is a twin turboprop heavy lift STOL airplane. Its competitors include beefy’s PADC Tamaraw, which I made a modernized version of, and the Twin Otter. It is made of carbon composite materials and only weighs 7100lbs. Takes off in 100ft and almost has the power to climb out vertically. With twin 950shp Pratt and Whitney Canada PT6A-62 engines attached to MT 7 blade props you will never need more power than you have. Start up procedure: AG1 for master, wait for props to un feather, AG3 to start engine 2 wait for rpm to stabialize, AG2 to start engine 1, wait for rpm to stabalize, then begin taxi. For stol takeoff idle throttles, tap brakes, flaps full down, hold full up elavator, then full power. When above 150kts use trim for pitch control because it is a very large surface for rotation. Thank you and enjoy! The differences between V2 and V3 include: expanded wing area (slightly larger chord and longer span) to help with wing loading, slightly more span in the horizontal stabs, MT 7 blade props (yes, 7 blades) for improved low end acceleration, CG just a hair back (to improve low speed stability), cheated in some more fuel so you can fly longer, lower weigt my removing tanks inside the fuse, and figured out how to add wing flaps (VTOL down). For 3.1 I added lights. AG1 (master) turns on the nav and beacons, ag4 is the strobes, and ag5 is the landing lights.