INTRODUCTION
->The advantage of rotary motion have far long been known and appreciated,it
includes number of patent including the patent of rotary Steam Engine by James
->Scheffel in 1952,get patent for rotary engine,utilised the principle that oval or
elliptical tower can be designed to maintain contact,while turning about find centres
and that three or more rotars can to enclose between them a continously varying
volume.
->Felia Wankel(German),got a patent for design of four phase rotary engine working
on otto cycle principle.
->Later on Dr.FROEDE made the inner rotar or bit while it rotated,and permitted the
outer body to kept stationary,such simple arrangement allowed attachment of intake,