Interesting place for the prop. It took me quite a few tries, but I managed to take off in the big sandbox from the bounding box! I started at an angle of 315 degrees. You have to be a little creative with the flight path to manage it.

@the archer Try not constantly pitch up while taking off as this prevents the plane from gaining speed. Just toggle the engine on and wait 3-5 seconds for it to lift it's tail. After that you can pitch up.
@NEEPHYTE I'm sorry to say that I cannot see major improvements in your version. I see you made it faster and changed the lift coefficient to produce less lift at near topspeed. The downside of this is that only if the plane is flying at it's topspeed it flies on level. Otherwise it constantly pitches down a bit.

Can you please have a look at this, Krautregen? It takes me hours to improve its take off and level flight ability.

modified

it will hardly get off the ground

This one is by Krautregen and not by me ...

Do you mean this plane?

\o/ Dornier has some very nice planes indeed.

Dornier