Вот отчасти ответ на ваш вопрос:Нужно с расчетными формулами разбираться, что стоит в программе, и на основе чего оно там стоит.
KAPER is a mathematical performance prediction program designed by John Winters exclusively for the design and evaluation of small lightweight human powered water craft. It is based on over 200 ship, boat and model tests of light displacement, shallow draft, low Beam/Length ratios and refined to suit tank test data from both canoes and kayaks. The first edition of KAPER was created in 1989 and limited to high beam/length ratios common to canoes. It was based upon Admiral David Taylor's formula for ship resistance modified to suit low Displacement/Length ratio hulls and canoe test data. After many permutations the existing program was refined to its current state in 1996. You may have seen the KAPER data in the kayak reviews in Sea Kayaker Magazine.