Hydrodynamic Regression Analysis of Seaplane Fuselage Tests in Fixed Navigate State

For establishing hydrodynamic mathematical model of seaplane taking off. Take the method of variable substitution, and transform multivariate polynomial regression formulas to multivariate linear regression formulas. Seaplane fuselage tests in fixed navigate state are conducted. Test results include hydrodynamic resistance, hydrodynamic lift and hydrodynamic moment .Stepwise regression analysis is founded. Regression analysis formula is trinary polynomial about model velocity, stepped draft and pitch. Regression interval prediction at 95% confidence level is estimated. The result shows that interval prediction contains very well practical value; Interval prediction can better represent accuracy of prediction result.