I know you'll be like what the hell is this fuselage design it's weak, but heres a little description on my thought when I was building this: I build this aircraft for the 100hp challenge only and the reason I participated is due to the massive amount of stol designs I had in the past few months and although most of them were not uploaded, most of them were just prototypes. However when I saw this challenge post I went for it just to see what I could do. The first thing is the engine, in the three I choose the lightest one because this one always had the best power to weight compared to all other engines. Then the control surfaces are very small because small control allow better speed in turns. Next off, the wing is massive which may have been the second most heavy however helped support the aircraft in the air easily, lastly the fuel only has an adequate count of 50 gallons which is light and allows flying for a while. In result(with multiple test flights), the aircraft proved fun to fly and is so far the fastest in its challenge, with a speed of about 140mph, it's rather impressive considering the engine has only 100hp.
Edit: None of the parts have been modded. Only nudging used for two slats on the wings so the plane doesn't look ugly.