Gripen - The Design Chronicles - Part 2

[@Millennium7HistoryTech]

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[@goodputin4324]

Bro, can you do a video on the Japanese F-2 jet fighter? Spasibo

[@martinrivera9186]

The is Gripen is overrated and never been battle tested. The Gripden and it's poliot might fall apart in a real actual action.. the American fighters go through military combat training daily with live ammo. I'v only seen the Gripen at airshows

[@Ferpe2]

I love your videos and you are very knowledgable. But in this case, I have a little advantage, as was in the team that made Gripen. The base problem was simpler. In all aircraft with flight control augmentation, you divide the control authority between the aircraft's augmentation and the pilot (you only have 100% control surface authority to use, measured in deflection angle and deflection rate which creates the aerodynamic force). This is more accentuated in an unstable FBW fighter as the augmentation needs more of the total authority to keep the aircraft from departing. In the first crash (third flight IIRC) the aircraft had too much of the authority and the pilot (Lars R) fought the aircraft, that he felt was flying its way and not his, to control it=PIO. In the August Stockholm case, the dial was the other way. The FBW team had opened up the pilot's authority so the pilot felt in control, but in a very remote corner of the flight envelope (Q, AoA, G), the aircraft got too little authority to control the aircraft. As the aircraft was now departing, the pilot tried to control it = PIO, but now the other way around. Fix was to introduce a selective FBW filter to reduce the pilot's authority a bit in this remote corner of the flight envelope. The aero fix added to the stability as well but the base fix was a digital filter in the FBW.

[@Millennium7HistoryTech]

Perfect! Thank you for the comment! This is the kind of comments I like to see because they add value or point out mistakes. Thank you very much!

[@RogerJL]

In the complete incident video it kind of looks like the Gripen regains control once the pilot is gone. (Would fit with pilot having too much control) Other observations - ejection force helped pushing down the nose (maybe...) - engine gone, so it would not really have recovered anyway (to me it looks like an emergency shutdown due to ejection)

[@Ferpe2]

@@RogerJL Yes, the condition was the pilot could use up too much of the pitch control authority so once the aircraft starting departing Lars (same guy as the first crash) held against violently with stick movements, eating up the stability authority for the aircraft further. Once he took his hand off the stick to grab the ejection handles the aircraft had 100% of the pitch authority and the aircraft returned to stable flight (you could see this on the crash recorders). But Lars was already on the way to eject, he had no chance to sense the aircraft was now OK.

[@SaeedKhan-ut1bv]

I am absolutely naive in this field but still I enjoyed listening to the video. Excellent. Regards. Saeed from pakistan

[@stupidburp]

It would be nice to have a copilot AI capable enough to try to land the aircraft safely even after the pilot ejects. It would not help during normal flight any differently than current control authority settings but it might help if the pilot is unconscious or otherwise unable to control the aircraft.

[@ReonLeon]

Legit did not know there's vortex generator strake behind the Gripen's canard. I learn new things every video. Keep up the awesome work!! Loving these videos.

[@kentunemo8491]

This is a highly informative Chanel. Keep it up.

[@henrikwannheden7114]

Excellent! I learned more specifics about the Gripen accidents than I've learned from Swedish media in the last 20 years.

[@RandomSwede-1]

Nice video! Even as a swede interested in aviation i knew nothing about the vortex generators behind the canards. Interesting!

[@Cythil]

Weird thing is that I knew that the Eurofighter hand them. But never reflected over the Gripen having them to.

[@RandomSwede-1]

@@Cythil Same for me!

[@Millennium7HistoryTech]

Glad you enjoyed!

[@mr.normalguy69]

One of the more underrated multirole fighters, yet one of the good ones.

[@wkelly3053]

I am new to the channel, found it by chance. As a former aero engineer, you have re-stimulated my conceptual curiosity in these sorts of topics. I am amazed at how much interesting information you impart in ten to fifteen minutes. Keep providing your videos please. They are unique indeed.

[@Gripenace]

Millennium, you revel small but important details in every video ;)

[@ruimoura4855]

Excellent. Stay safe too.

[@michelbrown1060]

Always interresting listening to you, my friend, for aviation videos. .

[@mrrolandlawrence]

i have to say .. watching all these videos, my respect for the gripen has gone up immensely!

[@perengstrom3414]

An early version of the F-22 also had a PIO crash. During landing the F-22 suffered from PIO smashing the airframe into the runway leaving a trail of sparks behind it as it skid along the runway. As I remember it they used the same software fix as in Gripen. Don't know if they got it from Saab, or if they fixed it themselves.

[@RandomSwede-1]

I would like to see a video on one of the predecessor for the Gripen, the J35. Also it was the first aircraft capable of cobra manuever.

[@lothwinmore2536]

_SWE_Falcon1 kzbin.info/www/bejne/oKLMdXiZm7ihjtU you can also see one of them fail and enter a superstall

[@FangPaw]

It's curious that the Draken could perform the Cobra, but not its successors, the Viggen and Gripen.

[@bodan1196]

@ZeOverman I'm trust that the '10' is a typo, as the P&W-JT8D was used in the DC-9, not the DC-10.

[@FangPaw]

@Niclas Eriksson It's certainly true that Draken pilots initially learnt the maneouvre in order cope with a superstall, but there are stories of Draken pilots using the Cobra in mock dogfights with Soviet pilots. As to whether this is useful in actual combat is debatable - but it's worth bearing in mind that extreme agility at low speeds served Harrier pilots well in the Falklands conflict.

[@oxcart4172]

I don't know whether they were the 2 incidents mentioned, but I know that SAAB test pilot Per Radestrom had to eject out of Gripens TWICE! He thought his luck might run out if he had to do it again, so he retired after the 2nd one!

[@jamesturner2126]

You speak english very well. I get your point: in a spin, separated flow over the wings stalled the flow over the rudder making it nearly impossible to regain yaw stability.

[@weldonyoung1013]

Not sure I understand the need for the vortex generators on the Grippen. If the reattached airflow results in asymmetrical dynamics, doesn't that mean the aircraft will fall to one side or the other. Could that be an advantage in a dogfight - unpredictability. Though there would be a lose of altitude. Isn't the most likely flight envelop to be in a hairied dogfight where this would be a concern? But if encountered at low altitude, such as at an airshow recovery altitude might not exist.

[@APS-bk2ni]

India should select Gripen E in MMRCA 2. Gripens are marvel of engineering, highly capable and reliable.

[@Maverick_Panda]

Tejas Mark2 will be as capable as Gripen E. Whereas our multirole requirements will be met mostly by Rafale.

[@Maverick_Panda]

@Ben Ghazi you can check out the planned specifications of Tejas mark2 and compare with GripenE.

[@rohitb3]

no thanks. Tejas will do the job.

[@rohitb3]

@Ben Ghazi You should check the specs of the existing Tejas mk1 and Gripen C.

[@rohitb3]

@Ben Ghazi Whats a combat link? And Gripen C has a very basic EW suite, doesn it? just like the Tejas mk1? And hows the British Marconi Electronic Systems Radar on the Gripen C working?

[@jeanvaljean9293]

Any idea how the ngf or tempest will keep the advantages of the canards without them (for stealth reasons) ?

[@Rikard_Nilsson]

Stealth design is highly overrated, it will be obsolete as sensors and jammers get better and better.

[@jeanvaljean9293]

@@Rikard_Nilsson no smart jamming works even better with low rcs that’s why the rafale was designed to be discret. With multistatic radars you will need both passive and active stealth combined. And even more you will need to erase « electronic shadows. » The rafale will get a stealth kit by 2030 to improve passive stealth and boost spectra’s active stealth capacity. And look at the ngf or tempest or faxx they will all be active and passive stealth. Just like the rafale is getting passive stealth, the su57 and f35 are getting active stealth. Its the story of the sword and shield, i dont believe in the all power of stealth like intended in the f35 but it will remain an important feature amongs others

[@philkelly8031]

I would love to see many countries buy this Aircraft as the price for what you get is far better than the F35, you may need the F35 but you also need a fighter that can be used along with the F35 has done their job. You can buy an Aircraft that you get more bang for your buck which in many cases most countries need, l really like your video’s on the Gripen

[@turnnburn6892]

WTH are you talking about man... Look, the Gripen is not a bad jet, but it is overrated af today (and that's a lot because of the underdog syndrome and politically correct bullshit that is engrained in many people's heads these days). It's just another 4.5 gen aircraft, and it's far from being the best of that generation. The F-35 is a generation above the Gripen E/F and is, without any doubt, a way better aircraft. AND... right now, an F-35A actually costs less to buy than a Gripen E/F. No one in their right mind, will pay more for a way inferior product. There's a reason why the F-16 continues having new customers and buyers (like Bahrain, Bulgaria and Slovakia), and why the F-35 is already a sales success (even if we exclude all the F-35s that have been bought by Uncle Sam for the USAF/USMC/USN). 😉

[@philkelly8031]

Turn Burn well WTF are you talking about with your bullshit so you think you an Aircraft expert l think not maybe you may have your money on the F35 a totally unproven Aircraft in battle. Which Aircraft costs per flight hour which can carry more even the canon with amount of rounds it can carry is Ridiculous it is supposed to be able to do all jack of all trades. Their is an old say Jack of all trades master of none. This is a fact that the Military said it could do and cannot you actually have 3 different model not just two, you have one for the Air Force One Vertical take off the the Navy version that has a larger wing span. I would love to see it take one the roll such as the A10 an Aircraft that is well and truely proven designed especially to do the Job while America is decommissioning them Russia are building more of their same equivalent attack Aircraft. The Gripen is cheap along with can do the F35 has not been put up against it for you even to say that, the F35 is not the F22 that is very much more Manoeuvrable can carry far more weapons than the F35 no Military should put all their eggs in the same basket.any of them as proven throughout history. So get your facts right before making you comment WTF.

[@AlexKall]

@@turnnburn6892 you should not listen to the Norwegians when it comes to prices of aircrafts, which you seem to have done.

[@killingfields1424]

Delta cannard configuration, unstable flatform, latest airborne phase array fashioned early detection electronic sweep. Now we know who's real boss in the sky.

[@clavier2560]

you think of ...Rafale me too

[@killingfields1424]

@@clavier2560 Rafale rules, the US Navy sees it too

[@cathrinepersson3374]

Like wat you doing. Did you know that Saab Drarken did the cobra?

[@Millennium7HistoryTech]

I was expecting this comment! kudos for being the first!

[@Mungobohne1]

Warthunder Players...

[@cathrinepersson3374]

@@Mungobohne1 kzbin.info/www/bejne/oKLMdXiZm7ihjtU

[@drbendover7467]

a quick fix for low stalling speed but what is the stalling speed and angle now?

[@levimark9810]

Good content

[@ghostindamachine]

Cool!

[@brodieboy3]

good stuff Millenium 7, but this video didn't seem to follow on directly from Part 1 - and bring us thru the development process to certification / operational status. Would really be interested in hearing you discuss the evolution of the Gripen from the A/B to the C/D to the current E/F configurations. I think I speak for everyone in also wanting to see a comparison of the current Eurocanards. Lots of Gripen fanboys because I think everyone likes to root for the little guy - but having watched your other videos discussing the 3 Eurocanards you seem to favor the Rafale if cost was not a consideration. Still, I'm not sure as you've seemingly refrained from definitively naming your favorite - though i think you did refer to the Rafale as the delta wing king?

[@Millennium7HistoryTech]

One thing I never expected starting KZbin was to find someone who was going to do an exegesis of my thought! I can let you have the drafts of my scripts so you can prepare a book if you want... 😃😃. I don't do comparisons, and I will probably make a short video explaining why they are mostly meaningless in this day and age. The Gripen Developement series follows an Aerodynamic/Structure/Propulsion scheme. There is material available about the original project but I don't have enough documentation to do what you are asking, unfortunately.

[@zafarsaeed746]

Gripan have any dog fighting and land attack record other pls information macj video

[@zunezunesson3985]

Gripen for Canada!

[@johndavidwolf4239]

Thank you for your video, you appear to really know your aerodynamics, my only advice is that as you are not a native english speaker, to make use of one of the internet word pronunciation sites, it took me until your third mention to get that you were saying "hysteresis".

[@Millennium7HistoryTech]

My worst problem as far as KZbin is concerned.

[@lwysparagon8109]

English is not my main language and I caught his word "hysteresis" from the beginning but I don't get the meaning in aerodynamics term. BTW , only 11 gripens left in my country.

[@johndavidwolf4239]

LWYS PARAGON : An over-simplified explanation is you can think of it as kind of like "bouncing back from an over-correction with a time lag."

[@stupidburp]

Another work around could be to include a subtitle set rather than relying on the autogenerated subtitles by KZbin. This would take some time and effort though so I understand if the content creator does not have the time to do it. I can understand him fairly well despite his accent but accurate subtitles would be still be nice to have.

[@mosca3289]

Cool👍🏻

[@sammoore9689]

Has gripen been to war?

[@bjornnordstrom]

Gripen has done 600+ missions over Libya. saabgroup.com/media/news-press/news/2011-06/gripen-passes-160-000-flight-hours-during-mission-over-libya/

[@sammoore9689]

Björn Nordström those are mission, but not combat missions, dropping the stuff that goes boom.

[@bjornnordstrom]

sam moore True.

[@sammoore9689]

Donald Twitter there is a real difference between dropping stuff, in practice ranges, and on a real enemy who can shoot back.

[@AlexKall]

@@sammoore9689 They can shoot back while flying over taking pictures too. In that case dropping things that go boom doesn't add that much.

[@danilogriz8433]

Para nós aqui do Brasil isso já parece filme de ficção científica kkkk quando chegarem vão estar velhinhos com teia de aranha

[@lothwinmore2536]

kzbin.info/www/bejne/oKLMdXiZm7ihjtU parré manoeuvre, later called cobra. Used to enter superstall for pilots training to handle it, also found useful to make an opponent overshoot. The first do a successful cobra, the second not so much and the third seems actually to fail exit and enter a superstall.

[@stalkinghorse883]

4:43 It looks like Ikea made the wind tunnel fan blades.

[@Sir_Godz]

ikea blades

[@vishalyadav3816]

Any update's on HAL Tejas Mk 1A video

[@arkadeepkundu4729]

He said he'll make a separate video about the Tejas. Let him finish the Gripen series first.

[@AsadMehmoodMaverick]

Why would he waste his time making a video about a jet that doesn't even exist?

[@hitesh20203]

HATERS GONNA HATE

[@arpansow3870]

@@AsadMehmoodMaverick because it is not a trash like the junk fighter 😂

[@lwysparagon8109]

Is Gripen and Tejas a comparable pair ? Same size, same engine.

[@martinabowm1786]

Algorithm, algorithm!😊

[@bastadimasta]

You have been making to much quality content. I feel guilty about the ones that I haven't watched.

[@darveshzamindar]

Very informative video. Please upload one video for one topic and not in parts, it is a request. Good job 👍 keep it up. HAPPY EASTER.

[@hansmeyer7225]

Gripen Gripen is okay nice plane but what about the TEJAS??? 😂😂

[@Millennium7HistoryTech]

🤣🤣

[@rohitb3]

as good as Gripen at half the price i suppose?

[@justforever96]

Argh, not the epic music montage!!!