>>519664298
pic related
it's a hand-built, two-thirds scale, P-38 lightning
aka TTP-38, if you want to look it up
built and flown by one texan, Jim O'Hara, over a period of 25 years
it is probably one of the peaks of human engineering an individual can achieve
or, as we white men would say, an interesting hobby

and, no, there's considerably more to it than simply multiplying dimensions by 0.6667