How does bore evacuator (fume extractor) work? Bore evacuators are most often used on large-calibre tank guns and self-propelled guns. Without bore evacuators, hot gases and other combustion residue leaks into the tank's interior, depleting oxygen levels and filling it with a foul odour that can easily induce nausea and distract the crewmen from their tasks. The evacuator is a reservoir that holds the super-heated, high-pressure propellant gases produced by the firing of a shell, then releases t

Russian T-90M being used in an indirect fire capacity. The bore evacuator doesn’t seem to be doing much, as a decent amount acrid smoke can be seen entering the turret following each shot. In westerns MBTs, the larger bore evacuators generally do a better job of clearing out the noxious fumes following each round fired. | Tankers