Patent ID: 8047884

Claim:
A propulsion system comprising: a cylindrical support member and a tubular rotatable member rotatably mounted within the support member and being adapted to permit a fluid flow therethrough, wherein the tubular rotatable member extends passed a down stream end of the support member; at least one vane attached on an interior surface of the tubular member and comprising at least one blade which extends in a direction toward a rotational axis of the rotatable member such that rotation of the tubular member and the at least one vane attached thereon draws fluid into the tubular member to accelerate the fluid flow through the tubular member; and a nozzle attached to the down stream end of the support member; the nozzle includes a primary nozzle and a secondary nozzle within the primary nozzle; and the secondary nozzle is engaged with the primary nozzle by at least one stator.