Few questions about Gast-principle: 1) Did anyone use or research guns using Gast-principle in WW II ? 2) Did anyone in western world use Gast-principle after WW II ? 3) How does it actually work? Pictures, animations? 4) Some history about that principle? 5) Which guns today use Gast-principle (besides some russian aircraftguns)? Not anything to do with Gast but... 6) Which are better, russian aircraftguns or western aircraft guns? In paper, russian Gatling-guns seem to be better than their American counterparts (lighter, no need for external powersupply, higher ROF). And how about non-Gatling guns, 1 barreled and Gast-guns against various western revolvers?