or polyethylene mixed with a certain percentage of an oxidizing agent this fuel mixture is combustible only with the addition of a separate oxidizing agent 21 from the hollow chamber body 2 according to this concept of the invention either a pure fuel is thus provided in the combustion chamber of the hollow chamber body 3 or a mixed fuel is provided that is combusted only under the addition of a separate oxidizing agent the combustion of the fuel combination takes place in the hollow chamber body 3 designed as the combustion chamber in which the solid or paste like component of the fuel combination is contained the combustion in the combustion chamber is initiated by an ignition source for example by a laser or the like the combustion can be interrupted by closing the fuel valve 8 that controls the feed of the liquid or gaseous component from the hollow chamber body 2 in this connection the fuel valve is controlled in dependence on the system and mission requirements the reignition of the combustion in the combustion chamber can be initiated in a similar way for this purpose the fuel valve 8 is reopened in order to permit the flow of the liquid or gaseous oxidizing agent 21 from the hollow chamber body 2 the combustion chamber is provided with outlets for the ejection of a respective hot gas stream these outlets being suitable as a whole for influencing a flight path of the flying body the outlets for the ejection of a respective gas stream are connected to the second hollow chamber body 3 as a common combustion chamber for the outlets the drive for influencing the.