At the basis of reactive thrust the law of momentum conservation lies. If from the closed system in some direction is ejected work substance, for example mass, then there is always a recoil momentum, which is reactive thrust. In the photon engines work substance are electromagnetic (EM) waves. Before the appearance of works the description of engines of the type. EmDrive were not known the jet engines, in which there is no ejection of work substance. The electromagnetic waves, which outside engine do not leave, are work substance in the engines of such type, but is formed standing wave in the resonator. The works, carried out by the Chinese scientists, who installed this engine on the satellite, they proved its fitness for work. However, the theoretical substantiation of the work of such engines up to now is absent. In the proposed article the attempt to find the physical substantiation of their work is made.
At the basis of reactive thrust the law of momentum conservation lies. If from the closed system in some directionis ejected work substance, for example mass, then there is always a recoil momentum, which is reactive thrust. In the photon engines work substance are electromagnetic (EM) waves. Before the appearance of works the description of engines of the type. EmDrive were not known the jet engines, in which there is no ejection of work substance. The electromagnetic waves, which outside engine do not leave, are work substance in the engines of such type, but is formed standing wave in the resonator. The works, carried out by the Chinese scientists, who installed this engine on the satellite, they proved its fitness for work. However, the theoretical substantiation of the work of such engines up to now is absent. In the proposed article the attempt to find the physical substantiation of their work is made.