INNOVATION: We propose to use the Universe extended medium "physical vacuum", which has allocated mass as inexhaustible resource of working medium for creation of reaction-propulsion thrust. We have built a vacuum reaction-propulsion device (VRD) for jet thrust using vacuum as working medium. VRD injects vacuum, accelerates it using external energy source, and outows it as a direct exhaust stream. Certain mass of vacuum obtains pulse and VRD obtains exactly the same opposite pulse. As a result, thrust force acts on VRD and VRD is accelerating.