Photon engine - jet engine, where as a working body applied light. Foton has a mass, and, accordingly, emanating from the engine, light creates reactive cravings. Currently, there is no mention only in scientific articles and science-fiction novels.
The main drawback is the low photon engine chain efficiency of energy conversion from primary source to the jet photons. Its task in matters linked c phase disperse photon missiles. In deciding to use relativistic laws of conservation of energy-momentum and the ratio of Einstein, binding energy, momentum and mass of particles.