ORIGINAL: AVGJohn
If you intend to build close to 100% scale your 1/7 scale Corsair will need weigh 2000 lbs. and have a 700 Hp. engine and won't fly. Try for "sport scale", have fun flying, and claim the full size plane is the one out of scale because it doesn't match yours to 7 to one scale.
You should have been paying more attention in physics. Divide weight by the cube of the scale, or in your example 343. Same for HP.