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Perhaps, last two posts have carried us away from realities of current season in regions of our prevalent residence. Matter of fact, the season (called winter, by the way) keeps maintaining its ‘primary feature properties’ - simply, it’s cold, and there’s sufficient amount of snow still covering most of the country.

However, I put this video here for a purpose other than just casual ’season minder’.

I rather found it illustrative, showing some moments of “ground operation of the planes with low mounted under-wing engines“. You can see those ‘dust devils’ of snow lifted up by suction of powerful turbofans hovering on their mounts just inches above the ground. Or, you’d better use a picture below to judge a clearance between the engine’s inlet and the ground surface :)

“One picture tells more than a million words” :) Re: ‘engine clearance above the ground’.

And as it looks, most of the snow sucked into an engine is apparently being able to travel all the way through the engine’s outer contour (the fan’s - ‘cold’ - contour <nozzle>), and at the end of this travel it is being forcibly ejected, along with the air pushed through by the engine’s fan.

Yet, there’s going to be another twist in the topic.

‘Vortex Dissipators’, that’s how they call these two probes visible sticking out under the both engines’ forward nassels Do you follow me so far? :)

The thing is, I recently worked on a post regarding operation of large jet planes from the ground/gravel strips, and luckily, I got this opportunity to film a real jet engine in a sort of ‘life action’, demonstrating how it ’sucks all kind of stuff’ inside itself.

So, in the mentioned post which is due to appear soon, we’ll be reviewing operations of large turbine aircraft from dirt and gravel strips. As in my opinion, this type of operation is a mere attempt to ‘utilize the efficiency of more productive machines in the bush‘, I’ll try to write it accordingly the main line of our ‘Comparative Analysis of Bush Operation on both sides of Arctic’ :)

An-30 is landing on dirt strip in Siberia

So, be it. In one of the next posts.

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