Patent ID: 6926567

Claim:
In combination with a fluid dynamic body undergoing propulsion by water jet emergence from an exit end of the body, a system for internally controlling directional steering during forward propulsion and reversal of said propulsion, comprising one transition passage duct formed within the body and extending to said exit end thereof; flap means pivotally mounted on the body for angular displacement from neutral positions forwardly directing said water jet emergence from the transition passage duct at the exit end; forward steering means for inducing said angular displacement of the flap means in an in-phase mode from the neutral positions to effect said directional steering; and reversing means for restrictively inducing said angular displacement of the flap means in directionally opposite direction during an out-of-phase mode to effect said reversal of the propulsion; wherein said reversal of the propulsion is effected by water jet outflow during said out-of-phase mode from outlets in the body spaced from the exit end; and wherein the flap means includes: a pair of horizontal flaps respectively undergoing said angular displacement during said in-phase mode in one angular and during said out-of-phase mode in opposite angular directions into engagement with each other to block said water jet emergence from transition passage duct to the exit end of the body.