What a fairly simple aircraft powered by MD550 engine, a 4 cylinder 55cc two stroke. Rocket assisted take-off then engine self starts. Over 2000 km range! How about a model version but not at full scale of 3.3 mtrs.
How about 1.5 meters powered by 20cc DLE. Foam wings and balsa fuselage. Matek Flight controller to enable loiter and stabislisation. The only problem to overcome is launching from the ramp with the engine running (prop catches bungy - been there already with one of my previous schemes.:lol: Yes, there are 3D Printed model version coding on the "Net".