Maugan17,
I am showing the numbers, example, so you will understand how to go from one size boat to another and know what you've got when you get there. The method, the logic, the how to do it, is much more important than an answer. If you don't understand "how you got there" when you arrive at an answer, you have no idea as to the validity of the answer.
An A cat scaled down to 14ft would really look slick. A Tornado scaled down to 14ft would look like a hot ticket. The only problem with these scaled down boats is that when you got on one, your weight would sink it.
Boat/hull design is not playing games with CAD on a computer.
Bill