I see.

Anyway, I like this plane. The design is good and it's fast. You should use it in the future and improve on it.

pretty sure the engine auto starts at 0.01 throttle, and i dont realistically think anyone will throttle down to 0.005 when landing or taxiing. However good idea, switchbox with clamp on throttle would be a good design improvement.

Response to your third, the engine auto starts when you throttle up, which means that on landing when you're quick to throttle down you might shut off the engine accidentally.

About the passenger version, that's fine, however I still think the design itself is a bit disproportionate, since the control surfaces are short.

I prefer to have the engine not be controlled by a button, because then you cannot vary the throttle for different flight speeds and taxi. Unless you mean by connecting it to an instrument panel?

I also am unable to make a passenger version because if I did then the fuel tank would have to be 1/2 of the size, limiting an already short-range plane.

@JostVanWair thanks for the design feedback, its very helpful. I am planning to do a wing design update soon.

Another suggestion, why not make a passenger version?

And finally, the wings look stubby and the plane disproportionate

Also the engine should be controlled by a button instead of the throttle

This is great! It's fast and easy to fly. You should remake it one day with a better appearance and maybe modular engines when they're fixed.