RadDisconnect”
You just copied and pasted that from Wikipedia.
”
any agreements or disagreement? I can go get the references wiki used? This reminds me of my encounter on F-16.net today(user saying bad airframe I don’t have any high hopes for that board anyways but there are some wise users over there) where I post the SU-57 in UAV mode can pull 15Gs someone accuses me its from sputnik, than I don’t get a response back when I say is the CEO so and so a bad reference if the quote is from him.
Either way interesting choices F-35 chooses MWIR with other additions, the other aircraft seems to chooses the lowest and highest points in the infrared spectrum for certain coverage along with the addition of radar. I wish to see EODAS or MIRES at work but I need to have TS/SCI Poly from both countries 🙁
Because that list is arbitrary and assuming that each bullet point has the same weight is stupid. Like how it makes 3 bullet points about false alarm rate and reliability.
IR is better when you’re at high altitude because you’re above most weather conditions. UV is better at low altitude where you have more clutter and missile ranges are shorter, like MANPADS. So a lot of helicopters use UV.
Su-57 pulling 15 g? What source are you talking about? What’s even the point of that? And when was Su-57 being a UAV? Isn’t that what Okhotnik is for?
RadDisconnectYou just copied and pasted that from Wikipedia and counted the bullet points. :highly_amused:
RadDisconnectWhy do you think the Su-57 is optimized against MANPADs and not AAM? The plane is not even thought to do CAS, so I very much doubt MANPADs have a big role in the requirements of the plane. But the DIRCMs of course could take care of them, as they would do with IR-AAMs launched by other fighters.
IR missiles will be detected by the 101KS-U due to the engine plume all around the plane, the radar missiles once beyond the burn time of their rocket engine either with the active radar in all of the front hemisphere (actually the FOV of the X band radar is something like 300º) or due to guidance link / ARH by the ESM onboard.
An EODAS system like the one on F-35 is clearly very cool and probably a future standard, it does not mean it is a must now. I think in fact such system is specially useful for CAS and in general A2G roles, rather than to detect incoming missiles.
UV sensor only detects missile when rocket motor is burning, IR like EODAS detects missile even when its coasting but IR system needs staring arrays which needs lots of image processing, so is much more difficult and expensive.
RadDisconnectAll detailed public info about SU’s MAWS is the same copy paste from MAKS2011. According to that data PAK-FA has 6 UV cameras for missile detection with 360 view, primary IRST at the front and two smaller DIRCM modules which are coupled with IRST at the top and the bottom. I have failed to find anything newer than this.
So some modules are UV, and some are IR.
But these IR on PAK-FA are scanning sensors and not staring ones like F-22 and F-35 MAWS? I guess different design priorities, it seems like Su-57 is better against MANPADS while less optimal against AAMs. Staring IR MAWS require a lot of image processing so it’s probably a lot more complex and expensive.
RadDisconnectDo we know if MAWS is UV or IR? PiBu says the 101KS-V is UV, but some are claiming that it’s also IR?
RadDisconnectNote how his account says “Guest” now lmao!
Did he finally lose his mind when he was utterly wrong yet again?
Did Scooter finally join KGB in the banned party?
RadDisconnectRussia can afford TU-160M2, PAKDA, 6G fighter, UCAV all at same time. you can see this from working IL-96M and C929 projects simultaneously. this approach of old and new development.
And unicorns are real too.
RadDisconnectInstead of wasting money on Tu-160, they should put that into PAK DA.
RadDisconnectThe problem is R-77 is a fatter missile than AIM-120. R-77 is 203 mm diameter while AIM-120 is 178 mm.
RadDisconnectGiven that ONE former head etc. Isn’t related at all. LM is simply molesting Germany.
Try TWO. Karl Mullner and Klaus-Peter Stieglitz.
RadDisconnectUS heavily pressuring Germany…
https://www.ft.com/content/4b56e040-6993-11e9-80c7-60ee53e6681d
Germany’s F-35 fighter rebuff raises questions for Nato partners
Lockheed Martin’s Europe chief warns ‘retrograde step’ imperils defence co-operation
“Germany’s decision not to buy the F-35 stealth fighter jet is a “retrograde step” that could hamper the country’s ability to operate at the same level as its Nato partners, according to the European head of Lockheed Martin, which manufactures the aircraft.
Jonathan Hoyle, vice-president for Europe at the US defence group, said the German decision in January to exclude the F-35 from further consideration to replace its ageing Tornado fleet had caught a lot of governments “on the hop”. The German defence ministry said at the time it had decided to acquire either more Eurofighters from Airbus, the European group, or Boeing-made F-18s.
…(…)…
Europe remains a key growth area for Lockheed, added Mr Hoyle, notably Poland, which will become a regional hub for the group. Poland has pledged to spend 2 per cent of its strongly growing gross domestic product each year on defence as part of a 10-year modernisation plan outlined in 2013.”
Given that former heads of the Luftwaffe have spoken in favor of the F-35, simplifying this to US pressure is ridiculous.
RadDisconnectMy point is I see no sources of yours. That are remotely as credible as mine…………..Yet, feel free to post any of them!
No one said Flynn isn’t qualified or not credible. But since he works for LM he would tend to only present the positive aspects of the F-35. Just because he’s qualified and knowledgeable doesn’t mean he’s unbiased. Are you not intelligent enough to know the fallacy of appealing to authority?
RadDisconnectDont find the source right now, but IIRC guys from KnAAPO said no big change was necessary in order to go from first to second stage engines, they have been developed to fit both on the Su-57.
I dont have official airflow data for the engines but I have read from knowledgeable people it should be like 120-130 kg/s for the 117. They are indeed smaller than the original AL-41 but very close in size to the F119.
EDIT: I found the source about the compatibility of the airframe with 1st and 2nd stage engines. He adds that already built planes are foreseen to be updated with the second stage engine.
The engine of the second stage “Type-30″ is created in the same dimensions as installed on the su-57 AL-41F1, with the use of the su-35 is unlikely, said the Deputy technical Director of the Komsomolsk-on-Amur aviation plant named after Gagarin Yuri Kondratyev. [INDENT]”The engine of the second stage are trying to do in the same dimensions, so large improvements in connection with its introduction, we do not plan,” – said Kondratiev.[/INDENT] According to him, the aircraft that has already entered into force, will also be replaced with motors. [INDENT]”The planes will be supplied with engines of the first stage, because the engine of the second stage only being tested. But in any case, after their testing and recommendations will be further developed in the replacement of the engine in the operating parts,” – said Kondratiev.[/INDENT] https://z5h64q92x9.net/proxy_u/ru-en.en/https/tvzvezda.ru/news/opk/content/201809061155-x4ac.htm
So it looks like izd.30 will be about same size as izd.117, which makes sense. A bigger engine will need a LOT of structure redesign which Sukhoi probably wants to avoid. I wonder how the size compares to F119 though. According to TEG, F119 is bigger than F110 since it won’t fit on an F-16.
RadDisconnectThey have said several times that the 1st stage engine can be considered a 5G engine (15 T thrust vs 156 kN on F119 is not that far off I would say) and they seemed even a bit offended that the plane was being put down based on the engine, since they claim MoD requirements were covered with it. They invested very heavily on the izd. 20 and they know what a 5G engine should do after all, and applied all their high-temp tricks on the engine, which is pretty new. That means that the plane should be capable of supercruising already with the izd. 117. But, and I understand them being annoyed in this case, AL-31F family being a rather high-bypass engine, it would not make sense to expect from it dry thrust in line with that of the F119, simply due to design philosophy. But on the other hand, F119 probably has a big fuel consumption in comparison, so one thing compensates the other during plane operation.
With izd. 30 they are explicitly designing an engine for supercruising, so they probably want higher speed and not marginal SC. Either it has lower BPR or variable cycle. They have said specific thrust is higher than any other comparable engine (that means IMO higher than F119) and given inlet design, trimming options and overall cross-sectional area I would say cruising speed on the level of F-22 or even higher should be expected. Just reminding, those inlets are 30% bigger than those of F-22, adjustable and theoretically valid (according to the patent) up to M = 3, that should match some requirement for either current or future performance.
Have no hard data but the figures from Paraly look reasonable to me.
Is izd.30 about the same size as izd.117? I think it is because the plan is to replace izd.117 with izd.30 with minimum airframe changes. How fast Su-57 supercruise depend on how the engine is designed. For example if F-22 had F120 engines it can probably supercruise even faster.
What is airflow if izd.117 and izd.30? Both engines are smaller than original AL-41 for MiG-1.44. Don’t know how their size compare to F119.
RadDisconnectThe roll force is countered with Control surfaces, so its not a big deal. And sometimes the Roll force is intended.
Countering roll force with control surface increase drag and is not consistent at all airspeeds. PYBBN type nozzle can mostly avoid that.
Sign In
