The Other STEALTH - The stealth features nobody talks about.

Infrared STEALTH is an integral part of planes like the F-35 and the F-22. Defeating infrared stealth with all kind of sensors, like IRST and FLIR, is the subject of relentless research.
Even non stealth planes like the G-18 or the venerable A-10 include elements of infrared stealth.
However, not everyone is applying infrared stealth to its planes and F-35 and F-22 are a bit of an exception from this point of view.
A special thank you to the web site Aircraft-101 basicsaboutaerodynamicsandavi...
It inspired this video and I used a lot of the material collected by them.
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[@Millennium7HistoryTech]

A special thank you to the web site Aircraft-101 basicsaboutaerodynamicsandavionics.wordpress.com/ Support me on Subscribestar www.subscribestar.com/millennium-7-history-technology Support me on Patreon www.patreon.com/Millennium7

[@mohammadsalah3319]

Thank you very much .... your biggest fan from Egypt

[@mohammadsalah3319]

@Alex Tyson great you should just go and read it yourself with no pictures or video representation and let this be the end of it no need to push people around Alex

[@atlet1]

The afterburner don't only emit infrared. Soot, which reflect radar is even released. This is another reason why supercruise is important. It is actually a much more important feature than most people understand, for several reasons. Please do a video on that topic. Even if a stealth attack is impossible to do in supersonic speed, if not hiding in very low level, things can go wrong and the need for supercruise be essential for surviving. Furthermore, reaching high speed close to the end of the mission, will give the weapons more speed and range, as well as shorten the possible time available for the enemy to react. Talking about stealth. A video about the new Russian 3-band mobile fast deployed anti stealth radars would ve intresting.

[@speggeri90]

First time I heard about such thing.. Thank you for sharing.

[@SogenOkami]

Actually not a problem as engine burn cleaner in afterburner. A great example would be the MiG-29 as the only time it's not producing smoke plumes is when in burner. Even with modern "smokeless" engines, you will always see a puff of faint smoke produced when transitioning in and out of afterburner, but not in any other flight regime. Even then, we're talking about particles so small, that weather radars would be the best way to track them as they are used to track moister, debris, and smoke in the event of severe weather. However these systems are not generally used in military applications due to the over abundances of things it picks up. The main problems with afterburners in regards to stealth are the IR signature, but also the nozzle setting opens up gaps that increase the radar signature, and of course the noise. The noise is highly underrated as a modern fighter flying next to a WWII aircraft tends to get drowned out by the prop noise, but once the burner kicks in, you can hear it for miles, and the distance increases with altitude. Out of the factors here, nozzle positioning is the biggest concern. The engine will be stealthiest at mil power, going above or below that regime will expose gaps in the nozzle, and in the case of the Raptor, this is especially true while using thrust vectoring which is why TV is used as a last resort in extremely slow flight regimes, otherwise the flight computer opts not to use it at all.

[@the-LeoKnightus]

The funny thing about the F35 and these type craft is that they are definately NOT dogfighters. The F35 is a modern, stealthy Harrier. They are designed specifically to avoid dogfights by being able to send Fox3 missles at air to air targets from 30-50 miles away while never being spotted by awax or on board radars. But if you get one into a turning dogfight, it can be easily defeated by Gen 4 dogfighters. As NATOs rivals get better on board radar, and their own stealth multiroles in theatre, the F35 may become quickly outclassed, like the Harrier of old.

[@SogenOkami]

@@the-LeoKnightus Yes but actually no. The F-35 is far more maneuverable than you give it credit for. Another issue is the moment you strap on weapons and fuel tanks performance goes through the gutter on 4th-gen aircraft. This is why even when it was limited to 7Gs with older software packages, it was able to keep up with F-16s very easily that had a typical combat loadout of two external fuel tanks. Even with those fuel tanks the F-35 can carry more fuel internally than the F-16 while retaining better performance due to the fact it doesn't suffer from the aerodynamic penalty.

[@the-LeoKnightus]

@@SogenOkami Ahh. The Achilles tendon of the F16. They have a baby range. Thats why despotic nations like Venezuela love em. Their pilots cant take off for Brazil and defect.

[@markvincentcocjin]

I'm so glad that you speak in encrypted English. The Chinese will never figure out what you were talking about.

[@deadlybladesmith3093]

😂😂😂

[@SP-fc9bx]

LMAO.... Dude, I love this guy, answers a lot of questions along with telling you something on top!!

[@user-gu1hl2kx2k]

he didnt say anything thats not known to the public

[@tanchiiann4237]

You are the only one in your unknown encrypted isolated world. The pride with zero value on your own.

[@johnyanga8532]

Please, what's encrypted English?

[@kenfelix8703]

Pure information no BS political warmongering 👍🏿

[@HotelPapa100]

Oh really? He spoke about IR absorption of CO2 in the atmosphere. Clearly he has a climate change agenda! ;-)

[@kenfelix8703]

@@HotelPapa100 🤣

[@sohomchatterjee]

I love your videos... specially how you break down well trusted “myths”

[@Linus89]

Great video! I´m blown away by the amount of engineering that goes into something as seemingly inconsequential as an engine nozzle.

[@Millennium7HistoryTech]

Actually the very fact that nozzles are made in a certain way is the reason why thrust does exist.

[@agsystems8220]

The aerodynamicist in me is crying at nozzle design being called inconsequential. Engines make pressure, nozzles make thrust.

[@nikolatasev4948]

A great video! I heard that F-22's pitch-axis thrust vectoring can reduce the plume signature in low thrust - by flattening the plume. It would work a bit like the F-117 , but to a lower extent. A Russian analyst was talking about pros and cons of single-axis vs multi-axis thrust vectoring.

[@jonathanpfeffer3716]

It has less to do with the fact that it has TVC and more just the shape of the nozzles, which are rectangular. Its the only fighter that does that, and it was an independent design decision from the TVC.

[@Mako2-1]

These days I rarely learn something new from aero videos just a bunch of regurgitation. But I can safely say I learned new things watching this video today and I thank you!

[@coreaccount4376]

The difference between primary and secondary sources.

[@orlock20]

The Apache E has an added part on the rear of its engines to direct the heat of the exhaust into the main rotor's wash.

[@daviddavids2884]

ahem. are you training to be the king of off-topic statements or what.

[@meccadestro3036]

@@daviddavids2884 it’s on topic but ok ..

[@daviddavids2884]

@@meccadestro3036 only if the topic is extended (by you) to include rotor-craft. since the heli exhaust temp is STILL high, a lot of ir information Still available. in other words, yer comment Lacks Relevance.

[@meccadestro3036]

@@daviddavids2884 😂😂 priceless

[@IndependentVFX]

That same mod was done to Alouette III helicopters back in the 1970s in the Rhodesian Bush War to minimize the risk from Strelas

[@Manbemanbe]

WOW! Another superbly well-researched video about a topic I’ve wanted to know more about for so long but struggled to find info on. The depth of your knowledge on military aviation is extremely impressive. Bravo and thank you!

[@kathrynck]

Excellent video as usual Millennium 7! A couple tidbits to point out: the F-35's engine (F-135) is higher bypass than any other "fighter" jet engine that I can think of. I would tend to call it kind of a "medium bypass". This limits top speed considerably, but that too is an IR-stealth consideration. It's very fuel efficient compared to it's thrust output. I'd argue that the F-35 is much more designed to fight in an IR-based combat environment than the F-22. The YF-23 would have had much better IR characteristics than the F-22, giving it longer legs in staying ahead of anti-stealth tech. The IRST in the F-35 is omni-directional, worth mentioning compared to other planes which have a limited field of view. The F-4 had some interesting IR characteristics as well, when pulling away from an IR guided missile fired at it from the rear, it's horizontal tail fins helped to obfuscate the exhaust plumes, while simultaneously the angle of the rear H-stabs would cause a lot of cavitation in the exhaust plume, causing it to mix with ambient air better. Alternatively, one could argue that the F-4's tail boom created greater IR signature for ground based enemies. The A-10's solution is ideal vs. shoulder fired IR missiles which tend to be pretty simplistic in sensing ability. But against the long-wave IR sensors, it reflects a lot of engine heat in a way which is kinda unhelpful. The F-117's V-tail also has some unfortunate long/mid band IR characteristics, in that it reflects exhaust heat down at the ground. I think the F-117 prototype version which used an A shaped tail fin arrangement would have been better in terms of IR performance. But it's painted so as to be less reflective, and at that time, most IR sensors were high-band. Another advantage of the F-4/15/18/22/35(and A-10), having "extra" rear mounted tail planes, is that it gives more control leverage vs. the planes center of gravity. To be fair, I think in the F-4/15/18, the IR advantages may not have been the motivation, but rather the control leverage. The A-10 is the first plane which I think might have been "trying" to obfuscate it's exhaust plume. It's possible the A-10 was merely trying to protect the engines from small arms fire into it's openings though. Radar-wise, the A-10 has an enormous RCS, which calls into question whether the IR vs ground enemies was a conscious consideration. For example, the wings hide the fan blades from ground radar, but the straight wings (at 90 degrees to the fuselage), and extensive external ordinance & protruding gun, make it extremely visible on radar anyway. I think they were just trying to protect the engines from physical damage.

[@martinclennon4640]

great channel and the comments provide information difficult to find. thanks

[@EthanThomson]

with the A-10, IR was definitely a factor. the exhausts are tilted slightly up to try and help

[@kathrynck]

@@EthanThomson good point. And it makes sense for the A-10 to be designed to be harder to target with high-band IR shoulder launched anti aircraft missiles. It's very difficult to reliably eliminate those from enemy defenses in SEAD, so CAS would have to be on guard vs. those in particular, even if it's radar signature is huge. I know attack helicopters similarly focus on IR stealth while largely ignoring radar stealth for the same reason.

[@wkelly3053]

Another great balance of detail and relatability for the viewer. Super. Looking forward to more.

[@doncalypso]

Damned shame that budget constraints prevented integration of an IRST sensor in the F-22 as originally intended.

[@wiryantirta]

many argued that the F22s downfall was being half-assed. Like if they just went through with it and implemented it across the fleet the production cost would've made sense. especially when now we see the flyaway costs of F35s or latest-spec 4++++++++++++++++ gen fighters

[@varunkoganti9067]

In other words Americans couldn't afford it.

[@appa609]

@@wiryantirta Though it would have somewhat increased frontal rcs and reduced supercruise ability. The F-22 is very good as a single-role fighter.

[@Bizzon666]

@@wiryantirta F-22 is half-assed indeed. It doesn't have a helmet queued high-off-boresight missile locking, feature that some modernized Mig-21s have!

[@Motorman2112]

@@bret9741 Do you mean Bill Clinton?

[@dscary1837]

I really enjoy your channel, thank you so much for all the hard work which is evident in your presentations. They're sometimes a little too technical for me to follow everything, but please don't change a thing. I'll catch up. Thanks again

[@Tiber234]

VERY informative and delivered in a straightforward presentation esp for non technical viewers - well done mate

[@michaelsteen9396]

You are very well informed, very observant, and very well educated to the engineering of infrared heat signatures and their detection. A+ video

[@P90F55]

Be sure to stay to the very end because the stuff discussed is very difficult to find anywhere else.

[@robertthompson5858]

I really really love your gentleman and it's so nice to listen to someone who has a clue what he's talking about

[@GunjanJuyal]

Thank you very much for the insightful analysis and comparison across various aircrafts🙏

[@houssamassila6274]

Great content. Always interesting.

[@cannonfodder4376]

Yet another informative video on a topic in Stealth not well understood compared to radar stealth. Given what we know of the American efforts in this area, I am most curious as to the Russian efforts with the Su-57 and its Izd 30 engine. The nacelle covers and tail cones don't have a F-35 airflow gap but the cooling scoops at the base of the vertical stabilizers does point to something. And then there are the Chinese. Most informative and clearly explained.

[@AirShark95]

I think the current setup on the Su-57 is temporary until a new engine and nozzle design are avaliable.

[@cannonfodder4376]

@@AirShark95 Yeah I was refering to the new Izd-30 engine. It has the serrated nozzles but nothing else visible. That is what I am curious about.

[@AirShark95]

@@cannonfodder4376 Yeah surely with their IRST experience they know just how important IR stealth is. Maybe they have a few tricks up their sleeve. Time will tell

[@lancevarrell711]

If I am not mistaken, weren't the maiden flight of the WS-10B?, they were a great improvement from the A model, but still quite behind, and the WS-10 is platform based on the Saturn AL-31 which is kind of outdated compared to 4++ and 5 gen engines

[@LRRPFco52]

The Russians basically overlooked or ignored IR signature VLO on the Su-57. Its engine nacelles are not insulated, there are no air ducts, and the nozzles hang out in the breeze. Same for RF VLO. It has some RCS reduction, but not into the VLO category. It's more of a Eurocanard killer than a competitor with the F-22. The Chinese J-20 does have the IR VLO techniques applied to it around the engines if you look especially at the J-20B, which is in production. They suck at making fighter engines though, and are struggling to field a reliable, high performance turbofan even after decades of trying to reverse-engineer samples they acquired from the 1980s.

[@stupidburp]

Excellent explanation of the topic, as usual.

[@giavanti0003]

Very informative. Well put together video. I did not know there were so many stealth techniques.

[@christianm1533]

Good stuff. Touching a bit on the trade-offs too! :) I'd say the ability to hide infrared depends more on the capability to use high-resolution sensors and high zoom optics in the scanner. This would be somewhat the equivalent of more powerful and more sensitive radar. To me, the current implementations look to favor aspect over extreme range in a narrow cone. Capability of optics reign supreme. Much like in classical photography.

[@williamtell1477]

Another great one with very interesting information! Very cool thank you!

[@craigkdillon]

Very clear. Well explained. Thank you.

[@kimkeam2094]

Very interesting topic discussed and I thank you for the information provided.

[@bret9741]

Love your format and professionalism! Just good information with only tiny biases occasionally showing…… vs my big biases lol!

[@leonardo8461]

Your videos are awesome, you are inspiring!! Best regards from a aerospace engineer master student. Keep going :)

[@martinclennon4640]

great to have a narrator that is easy to listen to.

[@VuLamDang]

5:30 I believe that hot spot is from air bleed vent for attitude control. Harrier have 4 such vent, 1 front 1 aft, 1 port and 1starboard. We can see similar hotspot at the empennage and starboard wingtips visible

[@trespire]

I remember reading somewhere that the attitude control jets were cold jets, air bled off the engines cold stages. That hot spot in the thermal picture does seem excessively hot though, either for electronics or an attitude jet.

[@VuLamDang]

@@trespire when air is compressed and discharge it always heat up, that's just the nature of PV diagram. it is not as hot as the main jet but it is able to reach boiling temperature. Similar hotspot can be seen on the wingtips and tail of the Harrier. Avionics is not that hot, operating temperature of electronics generally sub 100C

[@Mash4096]

Correct. The hot spot in the nose is one of the the reaction control nozzles that allows for pitch control during hover operation.

[@0Greenwatch0]

Could it be a Yak-38 russian harrier conterpart. Twin jets near the middle and one near the front. Harrier has 4 main jets around Cog

[@VuLamDang]

@@0Greenwatch0 Harrier have 4 jets but 2 are cold nozzle. You can see the cold nozzle heated up in front of the main hot column. Yak-38 would have a distinct center hot column of the lift jets and 2 side column of the main jet

[@defendliberty1289]

Excellent video as usual! Thank you for the greater work! Just a small spelling correction: I think you have used "heath" where "heat" was meant.

[@Millennium7HistoryTech]

Thanks for the tip!

[@wessnyder6192]

Very informative and interesting keep up the good work!

[@antoinelemoine9222]

the YF-23 have thermal tiles on the nozzle to reduce the heat signature

[@rapidsqualor5367]

I wonder why he didn't mention it in his video ? When he was talking about cooling fuel, I thought of the boundary layer suction (gauze pads) in front of the intakes as a great place to put fuel coolers. The day he does a YF-23 video will be a instant LIKE from me.

[@antoinelemoine9222]

@@rapidsqualor5367 Yeah It will be gold Maybe he didn’t mentioned it because the YF23 is a prototype

[@djorksolo8544]

@@antoinelemoine9222 Yeah prototypes are not operational jets which are really used on missions. So nobody would take the risk to talk about It before being finished.

[@appa609]

The thermal tiles just protect the airframe from the heat. The hidden nozzle geometry masks the exhaust.

[@superStarr808]

If I'm not mistaken the F22 possess these tiles as well.

[@jmaddy3]

Well you opened my mind to a whole new part of stealth in stealth fighters a new sub is earned

[@ghostindamachine]

Outstanding video! Can you make an episode about the A-10?

[@siddallj]

Really informative, thanks :)

[@paulwood6729]

Fascinating, excellent video 👍

[@user-ec6ix9ck2k]

Excellent information - thank you!

[@ThePrefect]

Thanks for this. Great Video.

[@EchoCharlieChaplin]

very informative. thanks for the video.

[@ELMS]

This is just excellent. Everything is on-point. So we’ll written and presented.

[@AbnormalObs]

First time viewing your channel. You have a new sub/ fan :)

[@salamanderpete]

Very interesting and well researched video. Have a subscription...

[@specnaz1395]

Very well informed and systematic. 👍

[@andrewstrongman305]

I love that you mentioned the A-10. It's engine placement and tailplane design have given it a huge advantage over ground-based IR missile systems.

[@dandare2586]

And belly landings, even the undercarriage pokes out a bit when its up :) I bet many British squaddies would prefer an A10 to come & help them out rather than an F35. For one it might actually turn up & not be in maintenance!!!

[@andrewmoore7022]

@@dandare2586 considering the British government protested against the use of the A10 near their troops during the war on terror due to its absurd amount of friendly fire incidents, I don't think so.

[@saucemaster9483]

Best flight engineering channel on KZbin, and for free

[@ibrahimylmaz6944]

I started to think that you are an aerospace engineer. Damn, you know a lot of staff about in this field man.

[@goodputin4324]

Stuff, not staff lol.

[@blackpigeon4743]

Another nice video.

[@dennisbartsch4895]

Hello there, I am studying aviation and just stumbled upon your channel. Very nice content! Do you plan on also doing videos about civil aircraft in the future?

[@HiReeZin]

Very informative video.

[@alexanbreizh6337]

Super video from someone well informed . Does Aeronautic is your line of work or are you just ultra passionate about the subject? or both. I really enjoy your channel , it make me less stupid... yes, i know, that's not much of a challenge. But anyway , thanks for spending time producing those mini documentaries.

[@talhajavedcom]

Aircrafts anatomy is explained very well. thanks man 😊😻

[@talhajavedcom]

Can you please give us a JF 17 documented video. We will love to see that❤️

[@Millennium7HistoryTech]

There is one on the channel already

[@TheSilmarillian]

Just found your channel hello from Australia ....subscribed

[@IndependentVFX]

great video!

[@chrv2956]

People who know something are interesting. People who know something that is interesting to me are very interesting. And when these people shares thier knowledge withy me in an interesting way, they er GREAT PEOPLE. Milennium 7* is GREAT. One of my favorites. Thanks for a lot og always great videos

[@Millennium7HistoryTech]

Way too kind!

[@dennissteyn8864]

Its always a very insightful to here your analysis. I'm no flyer or associated with it. Just the curiousity of knowing about these magnificent machines drives it. Have you heard that HAL is trying to use turbofans in Tejas to generate some power from the wind spead.?🙏

[@mwtrolle]

As always great contend.

[@Elios0000]

hey love to hear your take on what the USAF is up to with the sighting of flying F-117's out in NV test ranges over the last few months. There was another sighting of one just last Friday as well.

[@Millennium7HistoryTech]

Testing radars, potentially foreign ones. It seems reasonable.

[@mat5267]

Refining tactics, also using the F117 as a test bed.

[@saltyroe3179]

Look at B2 and YF23 which have tiled exhaust areas which hides heat from below. Also just like for radar IR has countermeasures. The B2 is difficult to see from the front side or rear.

[@donaldtrumpuncensored6728]

Very interesting, thankyou.

[@icaruscarinae]

Took a tour inside one of the F22 factories, was told the exhaust is cooled.

[@Millennium7HistoryTech]

Thanks! Important piece of information!

[@gerardbroek1943]

@5:41 nose and tail on the harier have exhaust for atitude adjustment. Also on the wing tips.

[@Taffeyboy]

Excellent!

[@AugmentedGravity]

Those stealth aircraft really do be stealth.

[@paulcadden4967]

You should have a look at the features of the YF-23 for the IR suppression it had. Inboard cowled bed exhaust and a blown air cooled ceramic lining to reduce the signature to name 2. Very cool jet all round

[@pashapasovski5860]

China uses liquid hydrogen to cool down bullet trains it's much more convenient than liquid nitrogen

[@dorusan]

At 5:40 it is not the heat from the electronics, that is basically a small pitch control jet for VTOL, there is one in the tail also.

[@aatifrehman4150]

Such a beautiful channel u have sir ! Music is fantastic.could u sir please make vedios on ..I have a few suggestions: The syrain war ,wat lessons the Russian learnt and what we learnt about them documentaries on Koreans and Vietnam war would be fantastic if u could give us some knowledge

[@DavieTait]

At 5:35 you're showing an AV-8B Harrier , the glow in the nose is a forward air nozzle taken off the main compressor ( same part of the engine as the forward nozzle either side ) and fed to the nose / wing tips and tail to help keep the aircraft stable in the hover

[@tacitdionysus3220]

Just excellent.

[@thelovertunisia]

Amazing analysis as ever. Greetings from Tunisia. (Il suo vicino dal sud hhh).

[@bilalhaque3986]

excellent video yet again! many thanks for it Why cant the exhaust be spread over a long narrow front for example the width of the tail plane by some mechanism. The wider surface area will have a diffusing effect. seems with rectangular and round exhausts the flow of hot air volume is not mitigated?

[@CNCTEMATIC]

Great video! Excellent information. Do you have any information on the effective range of IRST sensors for detecting aircraft? Obviously variable, but I'm wondering what is the order of magnitude. The fact it is used on guidance systems for short range weapons only suggests a range not much greater than 10-20km, but that is a pure guess.

[@Millennium7HistoryTech]

No, the IRST range in ideal condition can be much longer since they use different infrared frequencies. IRST are built for range, weapons sensors for imaging. Just oversimplifying.

[@veyev4320]

1st comment! and I love your content! Amazing! :)

[@formateuramzal1567]

how does the ea-18g growler compare to the spectra suite in the rafale ?

[@Samirustem]

good job

[@paulbrooks4395]

The ultimate “green” plane would probably be the ultimate IR stealth plane: a propeller driven, solar powered, large wingspan aircraft. But also terrible for radar stealth.

[@AirShark95]

In a way turboprop aircraft are quite ideal for low-intensity conflicts where an adversary is armed with MANPADS. They procude a MUCH cooler exhaust plume from their engines, and fly at slower speeds so aerodynamic heating isn't an issue.

[@SvenTviking]

Ducted fan.

[@dorian4219]

great vid! very educational though i think you have typo there, heath instead of heat.

[@Boeing_hitsquad]

CORRECTIONS: 1. The fuel cooling in the F-35 vertical tail was REMOVED from the design long ago. 2. The tails on F-22/18/35/et cetera aren't placed behind the nozzle for screening, it's for manoeuvrability with force BEYOND the thrust point (aided by canted tails which add horizontal forces) WITH the benefit of MIXING the cold air with the exhaust plume while manoeuvring. Creating a dissipation that "smudges" the plum and increasing the differential signatures between it and Decoy Flares as well as erasing the target track from newer missiles which keep track of the original signal and are decoy resistant.

[@Millennium7HistoryTech]

Thanks for the 2 comments. Do you have the sources?

[@libnan1943]

Good video

[@barendjacobusdeklerk]

The Ju-287 prototype was cobbled together from various aircraft as a technology demonstrator for the forward swept wing. Operational aircraft would have been different, and would have had retractable gear

[@whyjnot420]

If memory serves me right for the B-2 they also deliberately lengthened the path between the end of the engine and the exhaust ports to give the exhaust a little time to cool rather than just being spit out into the air. Could be wrong about this. The application where all the thermal stuff comes into play that interests me the most is how it works in a submarine environment. I really wonder how the future of that will look.

[@LRRPFco52]

A Royal Australian Air Force exchange pilot flying F-15Cs out of Nellis said he could not get the captive AIM-9X and JHMCS helmet-cued system to acquire or lock onto the F-22 within visual range Fox 2 fights. Said it was the most frustrating fighter he had ever fought against because no matter what you tried, you lose.

[@the_astrokhan]

You either forgot to mention or didn't know, that the Spirit's engines' infrared signature has been spotted to be far below what would be expected due to simple positioning. That's because, although entirely unconfirmed, it's stipulated to use an exotic cooling solution consisting of electrically charging the exhaust and utilizing properties of charged air molecules to facilitate heat transfer to specially charged mechanisms with an opposite charge. Supposedly, it's also at the core of one of the myths about the B2 utilizing charged leading edges to help create lift, thereby allowing it a higher capacity and range than would otherwise be possible. Either way, good video.

[@flighteaglediy8220]

I love the music! Please don’t give in to other comments and rid of it!

[@sebastianmizzon1462]

Are there any videos about the g91 or the Aerfer Sagittario?

[@jayakrishnanm2975]

imformative video sir bessttttt

[@benadrylgaming6930]

whats the intro music? ive been looking for the name of it for nearly 3 years at this point

[@sergarlantyrell7847]

Ooh, could you do a feature on PIRATE please, looks interesting.

[@deth3021]

Wouldn't the low bypass engine also increase the effectiveness of the afterburner as there is more o2? Similar to the sr71 engines?

[@barbarybar]

I can see them developing sensors to detect the pressure waves as an aircraft moves through the air.

[@jallen1227]

Many sources of EM radiation emitted by a vehicle at high speed - radar, heat (IR detection) and sound. Utilizing acoustics to detect mach cones is also of concern but virtually impossible to "mask" (and become stealth). Therefore, easiest to acknowledge little can be done to eliminate the bow wave and realize detection of a mach cone is well behind the vehicles accounting for speed and altitude. Therefore, supercruise and afterburner away from the target zones after an attack as quickly as possible.

[@TheJahangirkhattak]

Background music is above all

[@DigitalImageWorksVFX]

Yes, supercruise is important and it should be as one of the key requirements for 5th generation fighter.

[@formateuramzal1567]

can you please do a video about the b21 raider

[@billwhoever2830]

I know that this is not related but, could a lrasm missile fit in the weapon bay of an f35 or not (6:08)?

[@S300V]

While using the fuel as a heat sink and than cooling the fuel seems a good idea I think this only realy works for the body of the aircraft especially as ir detectors get more sensitive. I mean it would be a bit difficult to cool the nose the wingtips, the tail or the engine this way. The heat plume is several hundred degrees hot, I dont think one can hide it from these detectors when a modern thermal camera can see a man walking like 10km away. Also those cooling inlets on the 35 should degrade its radar stealth a bit. Dont know if its worth it.

[@pozzowon]

I'm a bit confused by the chart on 7:06. Specifically the absorption of UV light, I thought that was done by I3 instead of O2. Maybe a typo?

[@assarstromblad3280]

Good video, but you still didnt talk about the jamming / electronic warfare stealth that much. The Gripen E is almost 100% based on this design. Would be very interesting to know more about and how it compares to other types of stealth.

[@Bizzon666]

Electronic warfare is one of the most secret military branches. Only basic principles and older techniques are public knowledge. Generally it doesn't conceal you, frequently it strongly alerts the enemy that something is there, but makes it hard to pinpoint the location by interfering with optimal tracking/guidance.

[@assarstromblad3280]

@@Bizzon666 true. Maybe theres not much content to be made on the few scraps of information that exists.

[@goodputin4324]

Gripen is unproven and overrated.

[@Bizzon666]

@@goodputin4324 It is unproven and its capabilities are frequently overrated, but its relatively low operating costs make it a good candidate for smaller, not that wealthy nations.

[@assarstromblad3280]

@@Bizzon666 or more accurately, nations that don't want to spend a lot of money on their military.

[@daringumucio2779]

The YF-23 geometrically hid the exhaust plume and the nozzle far better then any other aircraft. Coupled with the aircrafts highly efficient super cruise capability it truly was revolutionary in IR suppression and would have had a far lower IR emission then either the FA-22 or brand new F-35!

[@dimman77]

I thought the trade off was that it generated too much condensation on maneuvering that could get picked up by radar.

[@daringumucio2779]

@@dimman77 I’m sure they probably did add to the RCS but not substantially more then any other aircrafts combination of horizontal stabilators and vertical tails! At least with he YF-23 you had to only deal with 1 of those because those two are merged into 1 moving surface per side which had the added benefit of shielding the exhaust trough IR. The YF-23 was the best blend of how to do it by far. The Air Force stated that they chose the YF-22 due to the perceived risk concerns of how the primary contractor Northrop/Grumman would be able to match the contract. Too bad...