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    Su-57 Stealth Fighter: News #7

    Isos
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    Post  Isos Wed Sep 01, 2021 11:32 am

    That's a former US pilot (which I highly doubt) trying to become a youtuber. His fans are mostly US fanvois lile the one you can find on f-16.net forum. Don't expect him to say anything true, he will always use the same dumb arguments used on that forum to keep its fans watching his videos and making money thanks to them.

    I guess his quite smart dunno .

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    GarryB
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    Post  GarryB Wed Sep 01, 2021 11:48 am

    Selling out to make a buck... the American way...

    But that is why they have such a big economy... his product is bullshit and he probably makes good money selling it, but it has not value to society... in fact it just creates a false sense of security which in the end is going to bite them in the ass and make the retreat from Kabul like like fun time at disney world...

    They count what he does as commerce, well it has zero value to their society... a continuation of their yes man society.

    Exactly zero value for us.

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    Big_Gazza
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    Post  Big_Gazza Wed Sep 01, 2021 2:18 pm

    owais.usmani wrote:Dude you have seen nothing, check out this masterpiece:

    OMG.... I have lost the will to live. Kill me now... No

    How can one nation have so many wretched idiots?

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    kvs
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    Post  kvs Wed Sep 01, 2021 2:32 pm

    Big_Gazza wrote:
    owais.usmani wrote:Dude you have seen nothing, check out this masterpiece:

    OMG....  I have lost the will to live. Kill me now...   No

    How can one nation have so many wretched idiots?

    Mental inadequacy breeds insecurity which begets fantasy projection.

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    JohninMK
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    Post  JohninMK Wed Sep 01, 2021 7:46 pm

    Tsavo Lion wrote:
    Going to come a time when those dollars are no longer accepted ..
    we now have plenty of oil & liquified gas to sell, besides grain & civil/mil. aircraft. With the UK & its former empire, "who cares what the price of rice in China?"

    Have you noticed just how fast tight oil production is falling? Or how well Russian grain production is doing?

    Not sure were the UK fits in here.
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    Post  limb Wed Sep 01, 2021 9:36 pm

    Im trying to search for the reason why the Su-75 has a two piece canopy instead of a 1 piece bubble canopy, but so far I have found nothing. There must be some kind of logic behind it. Ease of manufacture perhaps?

    Also Im guessing there is little rear visibility because (sensor fused)external cameras and UV sensors are superior to mk.1 eyeball in detecting aircraft and missiles in WVR, and also for extra space for the DIRCM.
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    Post  Big_Gazza Thu Sep 02, 2021 2:06 am

    Little rear visibility?

    Until this idiots video I've never heard anyone criticise the Su-57 cockpit visibility. These retards will use any excuse to justify their endless criticisms. Whats next? No expresso machine, or the flight computers won't run the Grindr app?

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    Post  kvs Thu Sep 02, 2021 2:57 am

    Big_Gazza wrote:Little rear visibility?

    Until this idiots video I've never heard anyone criticise the Su-57 cockpit visibility.  These retards will use any excuse to justify their endless criticisms.  Whats next?  No expresso machine, or the flight computers won't run the Grindr app?

    It's a Lamborghini Countach from the 1980s where to reverse you have to open the driver door and look down the side.

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    Post  Lennox Thu Sep 02, 2021 3:16 am

    limb wrote:Im trying to search for the reason why the Su-75 has a two piece canopy instead of a 1 piece bubble canopy, but so far I have found nothing. There must be some kind of logic behind it. Ease of manufacture perhaps?

    Also Im guessing there is little rear visibility because (sensor fused)external cameras and UV sensors are superior to mk.1 eyeball in detecting aircraft and missiles in WVR, and also for extra space for the DIRCM.

    Reuse parts from Su-57, I would say. Also, as of last year technically each piece of the 2 piece canopy that you said consists of 3 smaller pieces (3 layers of glass), which was hard to produce, so ease of manufacture might be a thing. They changed to a monolithic piece, but I dont know if it's installed in serial models yet.

    And it's not like you can simply turn your head around and see an approaching plane. If that's the case, you'd be dead anyway. But I'd imagine that they still have rear-facing mirrors (like those on Su-35) to aid dogfighting in addition to rear-facing cameras.

    Also, I've found this interesting pic which kinda show that the radar domes on Checkmate and Su-57 have similar size. Maybe someone could check and normalize the scaling of each image to be sure?

    Su-57 Stealth Fighter: News #7 - Page 39 F5105dae4fae48ca94e9780de61d41ae
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    Post  limb Thu Sep 02, 2021 9:22 am

    Lennox wrote:
    limb wrote:Im trying to search for the reason why the Su-75 has a two piece canopy instead of a 1 piece bubble canopy, but so far I have found nothing. There must be some kind of logic behind it. Ease of manufacture perhaps?

    Also Im guessing there is little rear visibility because (sensor fused)external cameras and UV sensors are superior to mk.1 eyeball in detecting aircraft and missiles in WVR, and also for extra space for the DIRCM.

    Reuse parts from Su-57, I would say. Also, as of last year technically each piece of the 2 piece canopy that you said consists of 3 smaller pieces (3 layers of glass), which was hard to produce, so ease of manufacture might be a thing. They changed to a monolithic piece, but I dont know if it's installed in serial models yet.

    And it's not like you can simply turn your head around and see an approaching plane. If that's the case, you'd be dead anyway. But I'd imagine that they still have rear-facing mirrors (like those on Su-35) to aid dogfighting in addition to rear-facing cameras.

    Also, I've found this interesting pic which kinda show that the radar domes on Checkmate and Su-57 have similar size. Maybe someone could check and normalize the scaling of each image to be sure?

    Su-57 Stealth Fighter: News #7 - Page 39 F5105dae4fae48ca94e9780de61d41ae


    Sorry I mistyped, I meant why did the su57 have a 2 piece canopy in the first place. The bar between pieces obviously reduces visibility. Also mirrors suck. Very limited FOV.


    Big_Gazza wrote:Little rear visibility?

    Until this idiots video I've never heard anyone criticise the Su-57 cockpit visibility.  These retards will use any excuse to justify their endless criticisms.  Whats next?  No expresso machine, or the flight computers won't run the Grindr app?

    I suspect its because if they criticize poor rearwards visibility on the Su-57 theyd be criticising the F-35's visibility. The F-22 really does have unmatched cockpit visibility because its a single piece bubble canopy.
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    Post  Lennox Fri Sep 03, 2021 7:49 am

    limb wrote:
    Lennox wrote:
    limb wrote:Im trying to search for the reason why the Su-75 has a two piece canopy instead of a 1 piece bubble canopy, but so far I have found nothing. There must be some kind of logic behind it. Ease of manufacture perhaps?

    Also Im guessing there is little rear visibility because (sensor fused)external cameras and UV sensors are superior to mk.1 eyeball in detecting aircraft and missiles in WVR, and also for extra space for the DIRCM.

    Reuse parts from Su-57, I would say. Also, as of last year technically each piece of the 2 piece canopy that you said consists of 3 smaller pieces (3 layers of glass), which was hard to produce, so ease of manufacture might be a thing. They changed to a monolithic piece, but I dont know if it's installed in serial models yet.

    And it's not like you can simply turn your head around and see an approaching plane. If that's the case, you'd be dead anyway. But I'd imagine that they still have rear-facing mirrors (like those on Su-35) to aid dogfighting in addition to rear-facing cameras.

    Also, I've found this interesting pic which kinda show that the radar domes on Checkmate and Su-57 have similar size. Maybe someone could check and normalize the scaling of each image to be sure?

    Su-57 Stealth Fighter: News #7 - Page 39 F5105dae4fae48ca94e9780de61d41ae


    Sorry I mistyped, I meant why did the su57 have a 2 piece canopy in the first place. The bar between pieces obviously reduces visibility. Also mirrors suck. Very limited FOV.


    Big_Gazza wrote:Little rear visibility?

    Until this idiots video I've never heard anyone criticise the Su-57 cockpit visibility.  These retards will use any excuse to justify their endless criticisms.  Whats next?  No expresso machine, or the flight computers won't run the Grindr app?

    I suspect its because if they criticize poor rearwards visibility on the Su-57 theyd be criticising the F-35's visibility. The F-22 really does have unmatched cockpit visibility because its a single piece bubble canopy.

    Well for one thing, the Su-57 original canopy was made from polyurethane, which was super hard to make correctly, so I would imagine using a 2-piece one would simplify the process. For another, the front piece of the canopy is intended to be a windshield as well and so it has an extra layer of glass. If you make a single-piece canopy, you have to incorporate this layer of glass into the frame, which adds complexity. Additionally, suppose for some reason the canopy malfunctions and jettisons itself, on the su-57 only the second piece would be blown away and the first piece remains there as a windshield (if you take into account the fact that the Su-57 will have a 2-pilot version, it would make more sense tbh). On the F-35, if I recall correctly, they also only place shaped charge at the rear half of the canopy for this reason, but I'm not very sure.

    As for the bubble canopy, the Su-57 does have a bubble canopy. Bubble canopy is when the canopy is situated higher than the top of the fuselage. It's just that on the Su-57, the "bubble" isnt that prominent. If it sits higher, it would create a suction area (area of low pressure) behind the cockpit, which increases drag. A way to prevent this, like designs from 4th gen aircraft, is to change the aircraft's nose shape to be more efficient, which isnt that easy for 5th gen considering they also have to take into account reducing radar signature.

    Also, a single-piece bubble canopy is extremely extremely hard to produce. GD struggled so hard to produce the F-16 canopy because of this, and the cost to produce the canopy was just insane (and this is coming from GD itself). At least to my point of view (which really does not have any experience with this matter), the extra cost doesnt justify extra visibility.

    Anyway, there are some pics of the Su-57 with cameras on the sides. I dont see why they cant add another one facing rearward.

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    Post  tanino Fri Sep 03, 2021 9:33 am

    Actually, on the first prototype of the PAK-FA in canopy was in three pieces (the rear one divided by a central bar. It was then replaced by the current one. In my experience, I see that the Russians are always (and rightly) very cautious in their handling of flight: example are backup presentation screens, but this happens in other weapon systems too. Let's say it's a rule to better ensure operability. I also remember that they did (and there are videos) a flight test without the rear canopy, demonstrating that you can land safely.

    The unwritten rule also applies here: everyone follows their own guidelines, and not necessarily the most famous or celebrated ones are the best.

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    GarryB
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    Post  GarryB Fri Sep 03, 2021 9:42 am

    The F-22 really does have unmatched cockpit visibility because its a single piece bubble canopy.

    No it doesn't.

    The canopy thickness is required to survive bird strikes and similar incidents so a single piece bubble canopy is enormously thick and enormously heavy... the alternative is variable thickness at the front compared with sides and back which will result in the view of the world being distorted.

    With a small frame like many aircraft have the thickness of the frame is maybe 50mm or so... bobbing your head means you can see in those areas and of course for their IRSTs and radar these frames do not effect the view at all.

    Next generation helmet mounted sights will incorporate the views from DAS systems that give a full 360 degree view around the aircraft including right through the cockpit and aircraft itself... but you will still be relying on cues from your IRST and radar as well as your EW suite and communications system for target information anyway.

    Once you have located a target you fly the plane so you can manouver to keep the target in view...

    Anyway, there are some pics of the Su-57 with cameras on the sides. I dont see why they cant add another one facing rearward.

    The self defence suite includes optical (IR and laser) sensors to detect threats... they have it on helicopters already and the views of these cameras can be stitched together to form a virtual view of the airspace around the aircraft... they are developing helmet mounted sights that can display this real time view to the crew of armoured vehicles and aircraft so the crew can see the world around their vehicle through armour and structure and cockpits etc etc.

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    Post  GarryB Fri Sep 03, 2021 9:49 am

    BTW it is amusing the single piece canopy of the F-22 is so critical because the French Rafale has beaten it in WVR combat and it has a three piece canopy and a fixed inflight refuelling probe blocking its pilots view... did they use a blind pilot and he beat him by touch and Braille?

    Su-57 Stealth Fighter: News #7 - Page 39 Rafale10

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    Post  Atmosphere Fri Sep 03, 2021 6:33 pm

    Are we forgetting that the helmet sight of the Su-57 in sync with the all round vision system do allow the pilot to see through the cockpit?

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    Post  Gomig-21 Sun Sep 05, 2021 7:33 pm

    Some nice pics.

    Su-57 Stealth Fighter: News #7 - Page 39 Urihw3hpoqy51

    This is quickly becoming my favorite color schematic for this aircraft.

    Su-57 Stealth Fighter: News #7 - Page 39 244863

    Su-57 Stealth Fighter: News #7 - Page 39 245595

    Su-57 Stealth Fighter: News #7 - Page 39 E9lDwkJXoAEwLgD?format=jpg&name=large

    Su-57 Stealth Fighter: News #7 - Page 39 E9FmOLeXoAAAD1f?format=jpg&name=medium

    Su-57 Stealth Fighter: News #7 - Page 39 Y1k83yocm1q51

    Su-57 Stealth Fighter: News #7 - Page 39 Sukhoi%2BSu-57%2BFighter%2BJet

    Su-57 Stealth Fighter: News #7 - Page 39 EUQMqHWUYAAvJse?format=jpg&name=large

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    Post  hoom Fri Sep 10, 2021 8:36 am

    LMFS wrote:https://news.usni.org/2014/06/23/next-generation-engine-work-points-future-u-s-fighter-designs
    Finally got around to reading this.
    It is interesting but I think the interesting bits need a bit of extra info to make proper sense.

    There are a bunch of references to 6Gen being high fineness (it gives you a flatter drag hump), context: F-35 is too fat to supercruise & I think the implication is F-22 is also fatter than would be ideal.
    Notably Su-57 is rather slender/flat & thin & the elongated sharp radome of Su-75 has been pointed out, I think these are for same reason.

    Also references to Supercruise being high-fuel cost & importance of enabling high-bypass ratio for subsonic efficiency because high-exhaust velocity is bad efficiency, context: F-22 engines have tiny bypass ratio, which was done to give it the required supercruise performance ie F-22 subsonic cruise efficiency/loiter endurance is probably very bad.
    As I understand the AL-41F-1S/117S has pretty conventional military plane bypass ratio so while it lacks the dry thrust for high supercruise performance it will be much more efficient subsonic.

    The US has built a proof-of-concept fully functioning variable bypass engine but its huge, mechanically complex & heavy -> not actually able to be put in a plane so they're doing follow up programs to try to shrink & simplify it.
    Meanwhile the original AL-41F for MiG 1.44 was apparently functional, lighter & simpler than a conventional engine of same power ...in the '80s Shocked

    I'm kinda confused about Al-41F/AL-41F-1S relationship, supposedly the latter uses the original tech but with AL-31 core instead of whatever core the AL-41F had.
    If it has that variable cycle tech already what extra stuff is the Izd. 30 engine bringing? scratch
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    Post  miketheterrible Fri Sep 10, 2021 9:26 am

    Atmosphere wrote:Are we forgetting that the helmet sight of the Su-57 in sync with the all round vision system do allow the pilot to see through the cockpit?

    Do you have more details on this?
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    Post  LMFS Fri Sep 10, 2021 10:19 pm

    hoom wrote:Also references to Supercruise being high-fuel cost & importance of enabling high-bypass ratio for subsonic efficiency because high-exhaust velocity is bad efficiency, context: F-22 engines have tiny bypass ratio, which was done to give it the required supercruise performance ie F-22 subsonic cruise efficiency/loiter endurance is probably very bad.

    Knowledgeable people estimate SFC 0.8, not brilliant at all. I don't know if that is including installed losses due to spillage for instance.

    As I understand the AL-41F-1S/117S has pretty conventional military plane bypass ratio so while it lacks the dry thrust for high supercruise performance it will be much more efficient subsonic.

    Relatively high bypass yes, SFC similar to AL-31F (0.67)

    The US has built a proof-of-concept fully functioning variable bypass engine but its huge, mechanically complex & heavy -> not actually able to be put in a plane so they're doing follow up programs to try to shrink & simplify it.
    Meanwhile the original AL-41F for MiG 1.44 was apparently functional, lighter & simpler than a conventional engine of same power ...in the '80s Shocked

    All indicates it is US that is closer to deploying 3 streams adaptive engines, maybe before the end of the decade. The original AL-41F was very ambitious and allowed to make a lot of progress, but it never really worked as intended, from what we know. It seems it was a simpler VCE with just two streams.

    I'm kinda confused about Al-41F/AL-41F-1S relationship, supposedly the latter uses the original tech but with AL-31 core instead of whatever core the AL-41F had.
    If it has that variable cycle tech already what extra stuff is the Izd. 30 engine bringing? scratch

    AL-41F-1S and AL-41F-1 are both based on the AL-31F (same stage count and basic layout) with modifications like materials, aero design, control, compressor area and so on, and they apparently have little to do with the original AL-41. They are in any case are fixed bypass, the possibility that izd. 30 is a VCE is not yet confirmed but is seems logical. Then, we know that there is a 3 streams engine in development base in the core technology of izd. 30, but I have not seen any reference to the planed dates for it.
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    Post  hoom Sat Sep 11, 2021 4:32 am

    Ah I think that clears things up a bit.

    So 117S engine is conventional cycle but using better materials/manufacturing to achieve the targets that origina 80s Al-41F was supposed to reach (but didn't?).

    Then Izd. 30 should be bringing in properly working variable cycle & some other refinements.
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    Post  LMFS Sat Sep 11, 2021 12:28 pm

    hoom wrote:Ah I think that clears things up a bit.

    So 117S engine is conventional cycle but using better materials/manufacturing to achieve the targets that origina 80s Al-41F was supposed to reach (but didn't?).

    Then Izd. 30 should be bringing in properly working variable cycle & some other refinements.

    117S is the engine of the Su-35, a modernization of the AL-31F. The 117 is the first stage engine of the Su-57, with FADEC and 5G materials but the same layout of the AL-31F too. The real successor to the original AL-41F (izd. 20) is the izd. 30, with brand new design not any more based on the AL-31F family and expected to be the basis of the Russian military engines for the next 40-50 years, according to Lyulka
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    Post  lancelot Sun Sep 12, 2021 4:13 am

    owais.usmani wrote:Dude you have seen nothing, check out this masterpiece...
    I sometimes see this guy's videos but this is totally retarded. With regards to his video on the Su-57. In a decade I would not be surprised if the Su-57 had more aircraft produced than the Raptor ever will. With exports even more than that. His comments on the canopy, also retarded, considering it ain't all that different from the YF-23's canopy. Had that entered service I wonder what his comment would be. Oh right. Our design must be better because they copied it.
    With regards to his video on the Su-75, Jesus, so much retard on that one. Yes, it isn't flying yet, but I would expect it to happen within a year or two. It is likely dependent on the engine which is slightly delayed from what I heard of it. I expect it to reuse much of the work done on the Su-57 with simplifications and mass production to reduce cost. It is obvious the engine will have full TVC capability. Same engine as in the Su-57M. Oh and it looks nothing like the godawful X-32 (thankfully) other than having the engine below the fuselage. Oh and want vaporware? How about NGAD?

    LMFS wrote:117S is the engine of the Su-35, a modernization of the AL-31F. The 117 is the first stage engine of the Su-57, with FADEC and 5G materials but the same layout of the AL-31F too. The real successor to the original AL-41F (izd. 20) is the izd. 30, with brand new design not any more based on the AL-31F family and expected to be the basis of the Russian military engines for the next 40-50 years, according to Lyulka

    117S engine has FADEC. The Izd. 30 uses a different engine cycle and more advanced materials.

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    Post  Gomig-21 Sun Sep 12, 2021 8:05 pm

    Su-57 Stealth Fighter: News #7 - Page 39 E_FarczXEAEIcZ8?format=jpg&name=medium

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