why can't russia?

S-ducts and DSI both require complex computer calculations of the altered airflow, or else you'll get compressor stall.

They can. Pretty much anyone can. The real question is why they chose not to. Someone at Sukhoi fucked up.

>>28692251
Even India can. AL-41F1 not made for s-ducts.

Significant deviation from the Su-27 airframe.

Such things are illegal.

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>>28692251
straight intakes are more efficient.

variable radar blockers may be used in place of s-ducts

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>>28692522
>using the photo shopped picture
sneaky breaky vatnik

>>28692538
what makes you think the pic is shopped? i didn't post it to prove some point. it's too dark to make out the interior anyway.

>>28692522
>straight intakes are more efficient.

They're actually the opposite, at high speeds.

>variable radar blockers may be used in place of s-ducts

Lowering efficency.

>>28692629
Most people claim it's shopped because you can clearly see much farther into the intake on the right side than you can on the left.

Still not as bad as vatniks that claim that the infamous picture that shows the fanblades is shopped and try to prove it by showing a completely different image of what it was supposedly taken from.

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>>28692629
Is well known shoop toovarish.

>>28692695
post the unshopped version then. or don't, i don't fucking care. i just posted the pic because it's cool.

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>>28692736

>>28692748
sigh, sometimes i think i'm talking to memebots and not people.

>>28692654
>They're actually the opposite, at high speeds.
first time i hear that. care to elaborate?

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>>28692522
>>28692629
>what makes you think the pic is shopped?

Oh you snicky bicky Vladimir

Just increase the brightness, it's a shit photoshop comerade

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>>28692968
srsly?

>>28692808
At high speeds, you have to lower the intake speed for the engine to be efficient.

>>28693050
Care to point out the condensation around the inlet in the pic you're replying to like your picture shows?

>>28693050
what are you trying to imply with that aircraft taking off on a humid day friendo :^)

>>28693070
no, you need to slow the airflow to subsonic to avoid compressor stall. but that is done on the intake ramp, way before the actual s-duct.
straight ducts are more efficient than s-ducts because it's easier to maintain laminar flow in them.
>>28693079
>>28693087
in the pak-fa picture, air flow is detached from the lower intake lip and a low-pressure zone is formed. this causes atmospheric water vapor to condense and form fog, which is clearly visible against the black paint on the lower half of the intake duct.

>>28693235
There is zero condensation around the inlet to provide evidence of what you're saying.

>>28693397
not to mention it's being fueled, and a ladder right beside it, I'd highly doubt they've have it spooled up and running in that condition.

>>28693235
>in the pak-fa picture, air flow is detached from the lower intake lip and a low-pressure zone is formed. this causes atmospheric water vapor to condense and form fog, which is clearly visible against the black paint on the lower half of the intake duct.

thats a real cool opinion, but you see it has a fuel line and a ladder extended, which means the engines are not on.

Because the fuel line would have a really good chance of getting sucked right into the intake.

Its a shoop. Either deal with it or be in denial.

>>28693451
>>28693505
amazing analysis. the smoke coming out of the left engine exhaust is also shooped in?

>>28693556
Exhaust? Because the shadow of the cloud totally touches the shadow of the plane. Inb4 they touch off the side of the picture.

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>>28692968
if you say so

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It looks really strange, but it might not be a shop. If you fuck around with sharpness, brightness, and contrast, you can make out what might be condensation in the intake.

>>28693988
Forgot to add:
What gets me is that the other intake looks completely different.

>>28694005
Because it's getting more light reflected in, being on the sun lit side.

>>28694005
This, one is clearly "painted" and the other is not.

>>28694026
No, thats not a shadow, its too dark, and it would not bend up into the intake.

You can clearly see the intakes body line on the other side, and its white above and below it

>>28692251
>TY
>AC 34

mfw I've been inside the intake on that exact jet

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>>28692251
>why can't russia?
Can't? Nigga, even their old Yak-43 had S-ducts. They invented S-ducts!

>>28697270

That's a Yak-141, and it didn't have a lift fan at all.

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>>28697270
>They invented S-ducts!
No.

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>>28697921
>NO
NYET

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>>28692251

why cann't America into intake blocker?

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>>28697995
you really wanna play this game nigger?

>>28698050
Because their engines don't instantly die when a pebble goes through them.

>>28698092
Actually just about every turbine is fucked if it ingests debris.

The difference is that our air force personnel are actually competent enough to maintain our airfields.

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>>28698092
>Because their engines don't instantly die when a pebble goes through them.
oh really

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>>28698140
the Soviet use this to maintain their airfield
they used it to defrost the airfield most of the time though

>>28698092
not tru senpai

>>28698201
>literally a MiG-15 engine on a trailer
I want one.

>>28698152
I never understood why they do this instead of firehosing the entire deck....

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>>28692302
Uh huh.... sure they do.

>>28692251
>4034
>plagued by constant APU problems
>sqwaked code 3 7/10 times
>hangar queen for 50% of the time I was stationed there

What a huge piece of shit.

Same thing with 4037, but at least that one had the decency to go down and not waste people's time.

>>28698201
that's on a fucking carrier. why do they need to defrost their carrier like that.

>>28698301

Different animal.

Its a turbofan and it doesn't into supersonic flight.

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>>28698517
not sure
maybe because carrier base aircraft need a shorter runway

>>28698284
Have to dream up dumb shit for everyone to do to kill time.

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>>28698576
>doesn't into supersonic flight
Doesn't matter. The S-duct on a fighter is behind the diffuser anyways (or sometimes, conveniently, part of it), so flow is subsonic in both cases.

>>28698576
All fighters and commercial/executive "jet" aircraft have turbo-fans these days, dude.
Fighters have a low bypass fan, and the others have a high bypass fan.
The military got away from turbo-jets a long time ago.