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 7400lbs. 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 V3 and V4 are larger flaps, extra bouncy suspension system, and larger wheels. Hint hint, this wasnt much of a change, but thats because this airframe is getting so good i dont know what to do. Recomendations in the comments please and i will not do more updates to this weekly anymore, but only when there is 2 more large ideas. Thank you and enjoy!