I've worked with a few, good folks and fun to be around and I'd welcome most on my team any day. Having expressed my affection for them however, there is a common characteristic. They are all as stubborn as bricks and once set upon a path will continue until death do us part! I'm sure that is an unfair generalization on my part, I don't intend to be culturally insensitive, but it matches my personal observations.

simply speechless.......

I flew the Antanov 24 in Cambodia under similar muddy conditions, but with well above freezing temperatures.

In the posted video, there is snow with freezing temperatures that can freeze over pitot and static ports, as well as other parts of the fuselage including flight controls and landing gear.

There is a reason the Soviet Union leads the world in aircraft accidents.

I used to work for a company that certified the first "inlet barrier" air filters for turbine engines on helicopters (B-206). They had done a lot of research on just how much damage is done by even the finest particles of dirt ingested into an engine with those kinds of tolerances and velocities.

One of the helicopter customers (federal agency) operating at low altitude in dusty and sandy conditions reported a 300 or 400 percent increase in engine service life with properly filtered intake air. Another geophysics research company was operating helicopters inside volcanic cones and calderas (I kid you not), in environments with volcanic ash, sulfur fumes, etc. and said that without the filter they would have surely lost several aircraft within a few hours under those extreme conditions.

So watching the Russian Antonov video makes me wonder just what the real-world achieved service life is on those engines and propellers, with all that abrasive muck getting into everything?

I was always trying to get my company CEO to develop this technology for fixed wing aircraft, but he was afraid of collapsing the filter element into the intake at speed.