Forced-Air Cooling in an Experimental Ross Machine Gun
This video examines an experimental Ross Machine Gun, a modified Mk III straight-pull bolt-action rifle. The modification includes a gas piston and trigger for automatic fire, and a unique forced-air cooling system. The cooling system features a one-way ratchet mechanism that spins a fan when the bolt cycles, directing air through a barrel shroud. This innovation was likely developed around 1915-1916 for potential military contracts that never materialized. The firearm was filmed with the cooperation of the Canadian War Museum.













