In order to constitute reasonable maneuvering rules of turning for waterjet-drived ship,a steady/dynamic mathematical model of waterjet propulsion system is set up.

A method of calculate analysis of transversal stabilization for turning of oil tank truck with irregular elliptical section,inclusing the modeling with four arc, discriminantion of relative position between the liquid linie and the section curve,is in this paper introduced.

This paper analyses the structure characteristics of directly turning belt conveyors and gives out the design parameters and layout of the key component-turning pulley.