So far, I think Kmot's looks most convincing as a full-scale. As far as the climb attitude goes, who knows, maybe it's a newbie pilot and it's getting ready to fall out of the sky.

Unless you pose the thing and hide or disguise the obvious, like coarseness of runway, big spark plugs sticking out, glow exhaust pipes, etc. this is difficult.

Here's my futile attempt, runway gives it away.