We're guessing Jack Roush would cast his vote for the latter-the famed North American P-51 Mustang. Indeed, he owns two examples of the aesthetically perfect WWII war bird-one is a "D" model that ...

Weighing in at a mere 3 grams, [Martin Newell’s] P-51D mustang model certainly puts him into that group. While the P-51’s 11.6 cm wingspan may not make it the smallest plane in the world ...