this recess and penetrates the wall of the headpiece 105 a propellant for example hot gas from a gas generator not shown flows into the recess 107 this propellant is discharged through the propelling nozzle 108 so that a propelling jet results with a direction of thrust which does not run through the axis of rotation a of the rotary nozzle body 101 an angular momentum is thereby exerted on the rotary nozzle body 101 setting it into a fast rotation with no retardation around the axis of rotation a a shaft 109 is connected to the neck piece 104 of the rotary nozzle body 101 coaxially to the axis of rotation a clamping wheel 110 and a ratchet wheel 111 which are directly joined together are attached to the shaft 109 the clamping wheel 110 and the ratchet wheel 111 can also be manufactured as a single component part as illustrated in fig8 the ratchet wheel 111 has three end stops 112a 112b and 112c which are arranged around its circumference at angular distances of 120 u00b0 the clamping wheel 110 includes cams 113 which are aligned with the three end stops 112a to 112c of the ratchet wheel 111 respectively two connecting links including a clamping link 114 and a pawl link 115 work together with the clamping wheel 110 and the ratchet wheel 111 respectively as will be described the plate shaped clamping link 114 includes a ring area 116 which encircles the ratchet wheel and has two outwardly extending lugs 117 on opposite sides two slotted holes 118 are formed in the lugs 117 perpendicular to the axis of rotation a and guide pins 119.