The K21 can travel as fast as 70 kilometers per hour on paved roads and cross a river at a speed of 7.8 kilometers per hour with the help of its water-jetpropulsion system.
To get a full understanding of the reaction thrust generated by waterjet is the preliminary step that has to be taken before the designs of waterjet cutting systems and jet propulsion systems.
认识并掌握水射流产生推进力的机理,是进行水射流切削系统和水射流推进系统设计的基础。
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The counterforce size of rotaty waterjet and ordinary is a key which influence the propulsion of the self-propelled waterjet.