@@mr.waffentrager4400 the wing is the part of the plane that stalls. a stall is when smooth ariflow separates from the top of the wing. Instead there is only turbulent air. When that happens the wing cannot produce lift and it stalls. The "fences" will section off areas of the wing so one part may be stalled while another won't be
Mr. Waffentrager The wings of an aircraft are responsible for redirecting air around them and creating a pressure differential which in turn produces lift. The body of the aircraft or fuselage doesn’t produce lift therefore stalling originates on the surface of the wings. Of course this will more than likely cause the entirety of the aircraft to stall however there are instances where on wing or another will stall. Stalling is the separation of smooth air over a lifting surface
AV80R 404 Speeder2345 not entirely sure about that. Wing fences are for “re-energising” the laminar flow section of the wing and maintaining even flow over the airfoil section they’re over, however if the crit angle of attack is exceeded the fences aren’t gonna do jack and it’s up to the slats/slots to keep it from stalling. The thing that prevents wings from stalling all at once is called Washout and is used on very modern fighter jets, not a mig15.
The shell of the heat helps normalize the chemical warhead before detonation increasing effective pen. But remove the shell and just a copper jet and you remove normalization. Itll retain its pen but it loses it quick against angled armor. Plus the distance
Pretty sure those fences are similar to modern day bar armour, which is designed to stop or "catch" rockets before they detonate, probably not for HEAT shells or anything like that
"Our tanks have transmission issues that cause bad neutral steering" "Give them flaps, Ivan. Give them flaps." *_Russian problems require Russian solutions_*
You’re somewhat correct. The fences decrease air separation at low speeds. The slats increase lift. Slats are more effective than flaps on swept wing aircraft.
But these fences are not designed to do that! In swept wings air tends to slide and not pass over wing. These fences redirect sliding air to rear of wing increasing lift at high speeds. Slots are a way to direct air over wing at high angles of attack at low speed manouvers like landing.
CaptainWatson, we may be saying the same thing here. I thought the fences are to prevent problems with deep stall in that swept wing aircraft can have issues with air flowing off the side in stall conditions. This happens on the wing ends first, so center of lift moves forward (pushing nose up) making it harder to recover from a stall. The fences are to help direct flow at higher angle of attack.
No, fences reduce tangential airflow (the flow sliding along the sweep). It both increases lift and decreases drag. It's the slats that delay stall, later Sabres got the slats removed and instead they have miniature fences. It's a bit of a misconception about the fences circulating on the net, original soviet video-documentation for pilots on swept-wing aircraft explains this phenomena quite well.
Germans: **Complicated engineering solutions.** Russia: "HEY IVAN WE CHAVE HOL IN SIDE" "SO PUT MORE SIDE" "VAT YOU MEAN PUT MORE SIDE BLYADH IS HEAVY" "SO MAKE NOT HEAVY" "BUT IS THIN" "MAKE HINGE, THIN BE BIG" "... HOUO BLYADH... Is good idea..."
Shooting through a building: When the slightly deformed rod comes out from the building, the aerodynamics will make it tumble and fail, so it shouldn´t work The armor of the newest Leopard works that way (the turret armor)
Teacher: Now children, what do we do before crossing the street? Phly: First we check the left side, then we check the left side Teacher: What Phly: What
To my knowledge the structures on the wings of the Mig 15 prevents air moving along the length of the wing and causing the wing tips, and hence the ailerons, to stall at low airspeed. This was a big problem for the American F86 Sabres and F100 Super Sabres. Just google "F86 Sabre dance". Scary stuff.
As a wise kolashnakof once said any fool can make anything complicated But it takes a genius to make something simple and work Forgive me for miss spelling his name and the quote is probably not the exact same but close enough
I wish all enemies I versed were like Phly... “he’s probably had a bad game so I’m not gonna shoot him.” , “I won’t shoot him unless he looks at me.” 🤣
I've watched phly before I've gotten WT and alot of his lessons and the way he plays have subconsciously carried over to me. Like I always stay away from spawns and I let the memers meme, sometimes I even make a friend or two from the enemy team. It's a lotta fun
@@hamburgerjones695 only to an extent, phly is what could be called a warthunder veteran. He knows where to avoid and where to take cover, and knows tactical strategies, and applies those, which causes him to have far better games far more often. For the rest of us, we press w and pray.
The fences on the mig 15 are to guide the air over the wing and prevent from going to the outwards section of the wing (basically it is so that you use more of the wing for generating lift), because air travels to the outwards part of the wing when it is swept. The slats on the f86 are for allowing the wing to get a higher angle of attack without stalling. So two very different purposes. Edit: also you do see those wing fences on a lot of allied jets, specifically those with very high wing sweep angle
The mig-15 has something called air fences on the highly swept wings to make sure air is flowing correctly. Without them the aerodynamics would make it highly unstable, not to mention at high angels of attack the jet shook immensely.
The earliest models didnt have the air fences it wasnt until the pilots found it unstable on landing that they put the fences on to stabilise the landing more than anything else, the aircrafts original flight characteristics werent actually too bad other than the landing
No aluminium for planes - build them from wood. Not enough time to lock the track links of t34 - make a bulge on side armor that hammers the pin back into place as the tank drives. Pens don't work in space - use pencil. Simple doesn't mean inferior.
The fins on the mig-15's wing are actually used to obstruct the spanwise flow on the wing which prevents the entire wing from stalling. It did have a side effect of increasing airflow over the wing by redirecting the spanwise flow
The metal things on the MIG are not used to make more lift. It is used to reduce the pressure above the wing separating the wing in sections the bubles of pressure doesn't merge that could have destroyed the wing at high speed.
I love how it’s this map where he always wipes out teams. Last time he did this (forgot which tank) he killed multiple leopards and wiped their team he oi.
The fins on the wings are there to keep the airflow on a a sweptback wing from moving outward toward. Without the fins you would still have good airflow but it will move outward over the wing towards the wingtips. With high angle manouvering this cause the wing to stall at the tips first, where also the ailerons are located rendering the ailerons useless. Also if the wingtips stall first and the wing roots are still producing lift, in a sweptback wing it gives a nose up force making stall recovery more difficult. So the fins keep the airflow spread lineaer over the wing making the stall characteristics of the wing easier to recover from a stall
0:08 when NASA had to send human into space, their engeneers developped an ink pen to write with no gravity. Russians solved the problem bringing pencils
which is great and all until you realise that the Russians and NASA BOTH used pencils and quckly realised that didn't work because shavings got into astronauts eyes and electronics, and then a dude developed the space pen with his own money and sold it to both parties for cheap
The MIG-15 and many other fighters had those. They’re called “wing fences.” They’re boundary layer control devices intended to prevent spanwise airflow over the wing. Helped prevent wingtip stalls and “Sabre tuck” which happens in swept wing designs
I used to play War Thunder religiously for years until about a year ago due to the monotony of the grind. I still watch all your videos though because you get to do all the things in this game that are "locked" behind paying GE that I never got to do. Keep making videos Phly! I'll always keep watching if you keep posting!
Hey phly, i've been watching you since 7th grade, I want to thank you for the 5+ years of pleasure, thank you so much for the entertainment. I just want to let you know thank you much for being amazing :).
The metal pieces on the MiG15 wings are called wing fences, they are there to keep the airflow chordwise (straight) as the airflow tends to go spanwise (towards the wing tip) on the swept back wing
The "slat" armor on the M46 was supposed to deform the fuze of the shaped charge therefore reducing its effectiveness by widening the molten jet's impact point
Youre kindof right. The Slats and wing fences do increase performance at low speeds, but they do it in different ways. The wing fences just keep the airflow flowing over the wing smoothly when it wants to flow down the wing to the tip, which reduces the stall speed of the aircraft since it forces the loss of lift to come from airflow separating from the wing which happens at lower airspeeds than the airflow flowing down to the tip of the wing. The slats reduce the overall angle of attack on the wing, change the airfoil to one with higher lift characteristics, and force air onto the top surface of the wing through the opening between the wing and slat that the slat moving into the deployed position creates.
I would say minimal engineering rather than minimal work... look how they 'fixed' said chernobyl tragedy... just keep throwing people at it... I mean 'biological robots'...
it was only caused because they disregarded the automatic systems in place to prevent things like that from occurring. it is a much cheaper solution compared to newer types of reactors which use water as a moderator for nuclear fission without water there is no fission however with RBMK they can refuel the reactor without shutting down because the control rods are its main form of moderating so no water is needed. making it an important feature of the RBMK compared to others in place. and finally the RBMK 2nd gen reactors are still use today. it was not a perfect reactor and has some known flaws that was disregarded because it was deemed theoretically impossible to achieve without disregarding multiple safety systems in place, because of this the reactor operators where not informed of this information and didn't know that it was technically impossible to cause a runaway reactor in such a manner.
Well, fuck, don't forget that Russia (RSFSR part of USSR) was *the first country in the world to create Nuclear Power Plants* . Before russian NPP's , nuclear energy was used only for destruction of Japanese cities. And... of course. Pioneers always are the first ones to face problems with new cut edge technologies. BTW, shit that happened in Chernobyl happened not because of ''engineering was bad'', but because of human factor. Also, Clint Larvenz , you're...i don't even know what to say... If they weren't ''throwing people at it'', huge part of Europe could've been demolished. Sacrifices these ''biological robots'' did are more worthy than your and mine whole existing.
You’re on the right track with the MiG, they’re wing fences and it does have to do with airflow, as helps prevent the entire wing from stalling all at once in the event of airflow disruption like a stall.
@PhlyDaily, since you asked: MiG-15's "wing fences" are there to minimize span-wise flow. They help, among other things, reduce asymmetric stalls - a bunch of other things too which slip my mind right now, but I just woke up. F-86's leading-edge slats are there for high-alpha maneuvering. LE-devices push Max-Lift to a higher angle of attack, and are pretty much required for high-performance fighters.
The slats on the F-86 are used for landing, they automatically deploy by gravity if the airspeed drops low enough. The ridges on the Mig-15 are indeed to keep the airflow going on higher speeds. There were two tricks that allied pilots used in Korea. 1st, drag the Mig in a shallow dive until you hit nearly mach-1. Then the controls of the Mig seized and the plane would crash. 2nd, reduce the airspeed so slow so that the Mig would go in a spin witch he could barely recuperate or crash. With the slats the F-86 could fly slower and still be controllable.
Hey Phly! Could you please do this challenge? Thanks! The *Heli-Bomber* Challenge! Try to bomb an enemy ground vehicle at the beginning of a GFRB match with the Hind Helicopter of your choice with a *Bombs Only* loadout. Good Luck and Enjoy the Challenge! EDIT: It has been the number 1 comment on multiple of your vids. Please do it!
The side slats are effective because of the material used. The unit you showed with the screens does not stop the kinetic energy of the round it just detonated the heat round while still outside the hull. The slats on the mig-15 are to stabilize the air on the wing, the flaps/leading edge slats provide more air over the top of the wing for lower speed without loosing control and lift. The F-4 is just proving you can make a brick fly if you put powerful enough engines on the plane.
well the point of the T series tanks not have all but one reverse gear was that it would have made it more complex and take up more space in the vehicle. also it didn't fit combined war doctrine that the soviet implemented. have artillery destroy fortification and disorientate targets, helicopters to destroy vehicles followed with Tanks to destroy remaining targets followed by BMPs to provide supporting fire and suppress enemy positions while infantry dismount and deal with them.
3:22 your right. I believe it was called boundary layer fence. So basically, the airflow in swept wings are both lateral and longitudinal. That results in a shock stall at the ends of each wing which diminishes the longitudinal stability of the aircraft. The boundary layer fence keeps the air from flowing along the wing to the fuselage. Basically forcing the flow straight and not hug the shape of the wing
Hey Phly! Appreciative swede back here again. The metal strips on airplane wings are called Boundary layer fences. It is, as you say, to keep the air going smoothly over the wing, but also to prevent the air from creating to much drag over the wingtip where vortices are created. That is why you have so called winglets on modern airliners. BUT slats and boundary layer fences are not the same thing. Slats are to create better lift at lower speeds together with the flaps. Also, only arrow shaped wings have a use of these fences. So not many WW2.
Hey PhlyDaily, Those metal fins on the Russian Mig are called Wing Fences, they keep the air flowing better over the wing at lower speeds. Like you said, Russian engineering works on the principle of "simple, but effective". The U.S. went more sophisticated with the slats. They work two-fold, first by increasing the camber of wing to provide more lift at lower speeds. Second, by pushing the air from below the wing up through the slot between the slat and the wing in order to "revitalize" the air flow on top of the wing, lowering stall speed. So your statement was pretty close, minus all the technical jargon. I'm an aerospace engineer, so let me know if you'd like help for your future videos.
The fins on the wings of the Mig are called wing fences and would keep airflow over the surface of the wing instead of sliding of the edge due to pressure differences
With the Mig 15's wing fences, you are partly right. Swept wings like to push the airflow sideways, which causes the outboard wing section to stall easily. If the outboard section of wing stalls before the inboard wing, you nose up and stall further, and then you stall badly, enter a spin and crash. The wing fence just stops that sideways airflow, which in turn allows the stall to happen over all parts of the wing at the same time so it's more controllable. The leading edge slats on the Sabre aren't for the same purpose, they're like flaps that you deploy to increase lift at low speed. They did put wing fences on some late model Sabres. A better comparison would've been with the Hawker Hunter F6, which has a dog tooth leading edge on the wing, which generates turbulence that acts like a wing fence. Its purpose is the same, stop sideways airflow. The Hunter F6 was the first in the Hunter line to have this modification.
4:23 Lift on a plane wing is generated by making the air flowing underneath the wing move faster that the air flowing over the wing. Not the other way around. When you have air flowing faster over the wing that is called downforce and is what race cars use to go faster in corners on a race track
The metal flaps are wing fences (probably), wing fences are designed to reduce the movement of air diagonally across the wing (wash-in/wash-out) which reduces wingtip vortices which produce huge amounts of drag. Wing fences don't keep the entire wing from stalling though
The problem with sweptback wing aircraft is that they are very difficult to recover from a stall in fact with this design the stall occurs at the edge of the wing, which means that the center of pressure, which is the place where all the lift is generated moves forward in front of the center of gravity. The result is a pitch up moment, it is called a deep stall. So to prevent the stall from spreading to the whole wing the engineers use the STALL FENCE, this device allows the air to flow smoothly on the wing even whilst the airflow at the edge is turbulent. Another way around are the slats, they re-energize the airflow and allow it to stick to the wing surface at a higher angle of attack they are used on almost all modern airliners and fighter jet nowadays.
That blade thingy on MiG's wing is called "wing fence". And there's a wikipedia article for it, cover pretty much all basic info you need. Long story short: "obstructing span-wise airflow along the wing, they prevent the entire wing from stalling at once"
The Fins stabilize air over the airfoil, so it goes from leading edge to trailing edge without sliding sideways so much. With the protruding nose, slipping air is a problem that leads to excessive turbulence and unclean airflow
The fins on the wings are roll stabilizers. Meant to stabilize level flight and make the aircraft make a more predictable roll, instead of yawing while rolling. Think of it as a mini rudder on the wings.
The fences prevent the airflow from deflecting outward due to the wing sweep - known as spanwise flow. Spanwise flow created dangerous low-speed/high angle of attack handling issues with many swept wing aircraft of the time. The spanwise flow reduced the "normal" flow of air over the outer parts of the wing, causing a tendency to pitch up and at the same time reducing the effectiveness of the ailerons. This could happen at any speed, but was most commonly seen at low speeds, and was often fatal if encountered during landing attempts (look up some videos on the F-100 Sabre Dane). Slats improved the airflow over the wing at low speeds, but were not specifically intended to reduce spanwise flow (although the mounting tracks/braces did in fact often direct the airflow back to toward the fuselage, having the effect of reducing spanwise flow).
Wing fences prevent the air from flowing spanwise on those swept wings. Span wise flow reduces the amount of lift the wing can generate as less air flows over the wing from the leading edge to trailing edge ( chord wise flow). Slats are just a way to change to curvature of the wing along with flaps to increase lift while also increasing drag.
The "metal fins" on an aircraft's wing are called "wing fences" Phly, they generate vortices off the trailing edge to help with stability - stop the entire wing from stalling at once
You're correct the F86 Sabre and Super Sabre have those flaps to allow the plane to slow down enough during carrier landings and not stall as well as to provide stability at low speeds during maneuvers. The Mig15 fins do the same thing essentially at low speed they trap low pressure air above the wing And the reason the fence M60 sucks against HEAT is a that its a late Korea/ early Vietnam Era tank and the fence is really only for RPGs and TOW/KORNET missiles. HEAT shells are usually traveling much faster with more force and a heavier charge so the fence is minimal vs a solid plate used as a spacer. Not to mention the T64 is much newer with heavier/newer armor and its on the hull vs the turret
Flay wing fences are there to stop lateral movement of air. With straight wing air will go perpendicular to the wing creating max lift. With slanted wings it tends to split into 2 parts trying to go down the edge and perpendicular . This creates turbulence resulting in low lift especially at low speed. Results are Saber dance. Watch F 100 Landing videos. And notice they also have Fences.
The explanation of how slats work is quite incorrect. Slats actually increase the area of the wings to increase lift at low speeds as well as temporarily increasing the chord. They are NOT SPOILERS!
The things on the Mig 15 are Callenburgh fences, they are there to prevent tip stall(air flow separating at the wing tips). A tip stall could lead to a loss of aileron control. Slats are there to change the camber in the wing and increase lift. P.s this is not a complete explanation so feel free to add info
Wing fences simply put, are used to prevent the whole wing from stalling by separating the airflow. The Soviets used them frequently, but other countries also used them occasionally
I believe the slats an the fence/fins solve separate problems. For example, NAA used both on the f100d with the wing slats allowing for higher AoA before a stall. Meanwhile, McDD used a dog tooth extension on the F4 to do the same thing as the wing fence; which is to prevent the stall of the entire wing.
Leading edge devices help change the camber of the wing to increase lift. I believe the things on the mig were to help direct the airflow, slowing for more stability
Wing fences like on the MiG-15 are common on the early jets. The early swept wings had problems with the crossflow and issues like the "sabre dance". Features like the wing fences working against the flaw.
HEAT don't work with a molten copper or whatever dart. It would simply splash against the armor plating because it's just molten metal and wouln't do any damage but scratching the paint.... The detonation of the charge isn't hot enough to melt the metal used in it. HEAT are also called "shaped charges" not only because of it's internal inverted cone shape (tip at the end) but also in the way they work. The detonation itself shapes the cone and pressures the tip at the end of the charge and simply squeeze/ turns it inside out to a dart. Basically cold forming of metal, but with an explosion instead of a hammer :D The dart, due to some nasty physics, then get's accelerated to approximately 10km per sec or 6,2 miles a sec. Then another physic rule has an impact: When a super fast solid body hits another solid body, the one who get's hit behaves like it's a liquid. So the pretty fast copper dart slices through the armor, like a hot knife through butter. That's why the holes of an HEAT impact look like it was molten.
maybe because those cages are not made to stop heavy heat shells fired from tanks that travel much faster than a infantry launched heat round which is 10 times lighter...
Wing fences (as seen on the Mig-15) is to prevent airflow from accelerating and moving down the wing towards the wing tip. It is a stability device not a lifting device like the leading edge slats seen on the F-86 Sabre.
The little metal fins on the mig-15 weren’t for lift instead they were for landings, without them the plane would be going slow and the crosswinds would make it shake violently (especially with the f-100) so they added the metal pieces to the wing to help stabilize it while at low speeds landing or taking off
Aerospace engineer here (not P.E.); you're mostly right about the MiG-15 fins, but the slats at the front of the Sabre wing are basically more landing flaps, but at the front of the wing.
It's possible that the flaps work better because they are solid. The 'fence' armor has holes, which can allow the heat charge to pass through easier. a modern HEAT charge detonation moves at about 10km/s, so there's no chance for either material to move out of the way. Thus, you can imagine the spaced armor as, in this case, shooting an actual armor plate vs shooting through an open window.
Spaced armor is only useful against HEAT rounds when the gap is really big (min 700~1000mm), below that it really makes no difference. Spaced armor is mostly used to destabilize medium-low caliber shot before it reaches the main armor. Slat armor is a completely different thing, it's not meant to detonate the round but shred it before it reaches the main armor behind.
Simply stated the wing fences/stakes are there to channel the wing over the top of the wing. It does two things. First it makes the wing more efficient. Two it makes the wing more stable in the yaw channel at higher speeds (AKA less squirrely).
Those things on the jet are called wing fences, they do help keep the air flowing from front to back of the aircraft, rather than slipping down the wing.
Slats at the front basically make the wing thicker increasing the distance air goes over the wing and causing a greater pressure differential and therefore lift. This will increase drag and slow the aircraft. The fences stop the air flow on swept wing from sliding to the wing tip. Increasing lift. Which also increases drag it always does you know increase height you slow its the lift. Think the wing tips of most modern airlines. They figured out further out the better I guess around the 70's.
![BOWKYLION - วิงวอน (ex-change) [Official MV]](http://i.ytimg.com/vi/cLdnZWDaO-w/mqdefault.jpg)
*HAPPY SUNDAY!*
It's PhyneDay.
Happy Sunday.
*packs pipes full of weed*
Thx
Go to church!
Btw i just endet watching ur T-64 episode of some time ago
The metal fins on the wings of the MiG-15 are called “stall fences” and they were designed to keep the entire wing from stalling at once
Wing from stalling ...?? Doesn't the plane stalls ?
Pls explain
@@mr.waffentrager4400 the wing is the part of the plane that stalls. a stall is when smooth ariflow separates from the top of the wing. Instead there is only turbulent air. When that happens the wing cannot produce lift and it stalls. The "fences" will section off areas of the wing so one part may be stalled while another won't be
@@ryancrazy1 tanks ! Oh thanks !
Mr. Waffentrager The wings of an aircraft are responsible for redirecting air around them and creating a pressure differential which in turn produces lift. The body of the aircraft or fuselage doesn’t produce lift therefore stalling originates on the surface of the wings. Of course this will more than likely cause the entirety of the aircraft to stall however there are instances where on wing or another will stall. Stalling is the separation of smooth air over a lifting surface
AV80R 404
Speeder2345 not entirely sure about that.
Wing fences are for “re-energising” the laminar flow section of the wing and maintaining even flow over the airfoil section they’re over, however if the crit angle of attack is exceeded the fences aren’t gonna do jack and it’s up to the slats/slots to keep it from stalling.
The thing that prevents wings from stalling all at once is called Washout and is used on very modern fighter jets, not a mig15.
Easy explanation why the flaps are better than the fence: the flaps are made out of stalinium, the fence not.
The shell of the heat helps normalize the chemical warhead before detonation increasing effective pen. But remove the shell and just a copper jet and you remove normalization. Itll retain its pen but it loses it quick against angled armor. Plus the distance
@@Metal_Tao You have exactly zero understanding of the engineering and physics involved, don't you?
*Staluminum
Pretty sure those fences are similar to modern day bar armour, which is designed to stop or "catch" rockets before they detonate, probably not for HEAT shells or anything like that
You made me search up what type of metal that is
"Our tanks have transmission issues that cause bad neutral steering"
"Give them flaps, Ivan. Give them flaps."
*_Russian problems require Russian solutions_*
Da tovarisch!
))))
nice joke!
.
Да нам просто похуй на трансмиссию...
Phly: No, I don't wanna do that, he's probably had a bad game.
Phly is such a nice guy, he deserves all the support he's getting.
We dont
You’re somewhat correct. The fences decrease air separation at low speeds. The slats increase lift. Slats are more effective than flaps on swept wing aircraft.
i think the 2nd helldiver has slats that extend out slightly, but i thought that was just for some cooling thing
But these fences are not designed to do that! In swept wings air tends to slide and not pass over wing. These fences redirect sliding air to rear of wing increasing lift at high speeds.
Slots are a way to direct air over wing at high angles of attack at low speed manouvers like landing.
CaptainWatson, we may be saying the same thing here. I thought the fences are to prevent problems with deep stall in that swept wing aircraft can have issues with air flowing off the side in stall conditions. This happens on the wing ends first, so center of lift moves forward (pushing nose up) making it harder to recover from a stall. The fences are to help direct flow at higher angle of attack.
Richard Casto Correct. Fences delay laminar flow separation (stalling) and help keep the center of lift stable on the wing.
No, fences reduce tangential airflow (the flow sliding along the sweep). It both increases lift and decreases drag. It's the slats that delay stall, later Sabres got the slats removed and instead they have miniature fences. It's a bit of a misconception about the fences circulating on the net, original soviet video-documentation for pilots on swept-wing aircraft explains this phenomena quite well.
Germans: **Complicated engineering solutions.**
Russia:
"HEY IVAN WE CHAVE HOL IN SIDE"
"SO PUT MORE SIDE"
"VAT YOU MEAN PUT MORE SIDE BLYADH IS HEAVY"
"SO MAKE NOT HEAVY"
"BUT IS THIN"
"MAKE HINGE, THIN BE BIG"
"... HOUO BLYADH... Is good idea..."
Thats spot on lol
Volvith why did I read that in a screaming Russian voice
Yas
..........excellent
i've read it like Boris the youtuber, but replacing Ivan by Anatoli
Dimitri : we have problem with wistirn HEAT-FS
Ivan : No worries comrade, look at thos new skirts I got
Dimitri : ))))
Ivan : )))))
)))))
)))))
L 44 cheat fs : ((((
))))
@@mr.waffentrager4400 Every T-64 skirt till tandem HEAT joins match
reminds me of the old days of when the T-64A was first introduced
Honestly that was the best top tier, now it’s ridiculous
Damn you're old. That was like 1971 👀
Shooting through a building:
When the slightly deformed rod comes out from the building, the aerodynamics will make it tumble and fail, so it shouldn´t work
The armor of the newest Leopard works that way (the turret armor)
americans: LOAD HEAT
russians: HEAT wont go thru
americans:yes it will
russains:*shows side skirts* What about now
Well _technically_ the HEAT will go through the side skirts. Ha, checkmate, comrad!
@@Furzkampfbomber russian bias thoXD
*flaunts skirt*
How lewd
is it wrong that i was aroused by this conversation??????????
@@johncarter-ny5vl probably
Teacher: Now children, what do we do before crossing the street?
Phly: First we check the left side, then we check the left side
Teacher: What
Phly: What
Phly: First we check the left side, then we check the left side.
Teacher: What?
Флай: Что?
To my knowledge the structures on the wings of the Mig 15 prevents air moving along the length of the wing and causing the wing tips, and hence the ailerons, to stall at low airspeed. This was a big problem for the American F86 Sabres and F100 Super Sabres. Just google "F86 Sabre dance". Scary stuff.
goodsous sCaRy StUfF
They’re called “fences”.
"It is crazy to see what they can do with very simple designs."
*AN-94 has entered the chat*
@jonny j it's a complicated gun, but it has an actual pulley inside lol
As a wise kolashnakof once said any fool can make anything complicated
But it takes a genius to make something simple and work
Forgive me for miss spelling his name and the quote is probably not the exact same but close enough
AK 107 has entered the chat
Kyle Nicholson do u mean Kalashnikov?
I wish all enemies I versed were like Phly... “he’s probably had a bad game so I’m not gonna shoot him.” , “I won’t shoot him unless he looks at me.” 🤣
I dont shoot new spawns or go near so they have a chance :) that's why I always die
I've watched phly before I've gotten WT and alot of his lessons and the way he plays have subconsciously carried over to me. Like I always stay away from spawns and I let the memers meme, sometimes I even make a friend or two from the enemy team. It's a lotta fun
Iron Duke I feel that the only acceptable time to spawn camp is when a team has all the caps
@@Dman1998 Yeah that's the only time I do it too,no choice then
when I try the same thing as phly ... I die immediately...
panssarmies 218 so do I man, so do i...
Phly is a cancer.😂😂😂😂😂 cant kill him
KAUAN ON KÄRSITTY RYSSIEN VALTAA! SUOMEN KANSAN VAPAUTTA SUOJELLESSAAN
@@hamburgerjones695 only to an extent, phly is what could be called a warthunder veteran. He knows where to avoid and where to take cover, and knows tactical strategies, and applies those, which causes him to have far better games far more often. For the rest of us, we press w and pray.
The fences on the mig 15 are to guide the air over the wing and prevent from going to the outwards section of the wing (basically it is so that you use more of the wing for generating lift), because air travels to the outwards part of the wing when it is swept.
The slats on the f86 are for allowing the wing to get a higher angle of attack without stalling.
So two very different purposes.
Edit: also you do see those wing fences on a lot of allied jets, specifically those with very high wing sweep angle
11:00 I love how he didn't kill two ez targets coz he thought that he could ruin their time. God bless you phly!
“You know what I’m talking about World War 1”
Nope I don’t have a clue what the hell you are referring to.🤷♂️
He's talking about decoys to fool hidden snipers in the trenches of WW1
stick a helmet on a stick and put it slightly above top of trench to check for snipers probably
MuffledOrk that used Ww2 as well :)
@@stalinium4769 yeahh but its more famous as a ww1 tactics because its a trench warfare
@@AHappyCub Alternatively the weird mushroom-like entry hatch on Renault tanks.
The mig-15 has something called air fences on the highly swept wings to make sure air is flowing correctly. Without them the aerodynamics would make it highly unstable, not to mention at high angels of attack the jet shook immensely.
The earliest models didnt have the air fences it wasnt until the pilots found it unstable on landing that they put the fences on to stabilise the landing more than anything else, the aircrafts original flight characteristics werent actually too bad other than the landing
So satisfying seeing those op premium leopards getting one shooted after they killed me so many times in my stock 7.7s
Lol, ya they really should be at 9.0
@@marshallhenry6174 lucky for us its going to 9.0 :) I will finally be able to play my m103 and t54s :)
0:05 *"in terms of solving problems with minimal engineering"*
minimal engineering, also known as soviet engineering
Водка engineering.
Gulag engineering
No aluminium for planes - build them from wood.
Not enough time to lock the track links of t34 - make a bulge on side armor that hammers the pin back into place as the tank drives.
Pens don't work in space - use pencil.
Simple doesn't mean inferior.
@@aleksanderf4672 Exactly.
The soviets get a raw deal.
Everyone seems to forget it was them who shit stomped their way to Berlin.
Without phlaps: speed 0
With phlaps: speed 100
The fins on the mig-15's wing are actually used to obstruct the spanwise flow on the wing which prevents the entire wing from stalling. It did have a side effect of increasing airflow over the wing by redirecting the spanwise flow
11:00 Look at Phly, actually caring about the pheelings of other players! Because that's what heroes do.
The metal things on the MIG are not used to make more lift.
It is used to reduce the pressure above the wing separating the wing in sections the bubles of pressure doesn't merge that could have destroyed the wing at high speed.
You know, I could swear I heard the "6th Sense" skill from WOT activate at 6:00 when he shot that guy on the other side of the rock
USA: we need a new tank
RUSSIA: *improvise, adapt, overcomwe*
I love how it’s this map where he always wipes out teams. Last time he did this (forgot which tank) he killed multiple leopards and wiped their team he oi.
The fins on the wings are there to keep the airflow on a a sweptback wing from moving outward toward. Without the fins you would still have good airflow but it will move outward over the wing towards the wingtips. With high angle manouvering this cause the wing to stall at the tips first, where also the ailerons are located rendering the ailerons useless. Also if the wingtips stall first and the wing roots are still producing lift, in a sweptback wing it gives a nose up force making stall recovery more difficult.
So the fins keep the airflow spread lineaer over the wing making the stall characteristics of the wing easier to recover from a stall
0:08 when NASA had to send human into space, their engeneers developped an ink pen to write with no gravity. Russians solved the problem bringing pencils
Yay, there is a part about that in my textbook.
which is great and all until you realise that the Russians and NASA BOTH used pencils and quckly realised that didn't work because shavings got into astronauts eyes and electronics, and then a dude developed the space pen with his own money and sold it to both parties for cheap
Those slats on the mig are for keeping a uniform airflow over the wing at low speeds. It helps lower the speed for stalling
phly: STOP you scared me
friendly: LETS SHOOT AGAIN?
The MIG-15 and many other fighters had those. They’re called “wing fences.” They’re boundary layer control devices intended to prevent spanwise airflow over the wing. Helped prevent wingtip stalls and “Sabre tuck” which happens in swept wing designs
Tavarish play the GLOURIOUS T-35 this is work shift 16
I used to play War Thunder religiously for years until about a year ago due to the monotony of the grind. I still watch all your videos though because you get to do all the things in this game that are "locked" behind paying GE that I never got to do. Keep making videos Phly! I'll always keep watching if you keep posting!
Hey phly, i've been watching you since 7th grade, I want to thank you for the 5+ years of pleasure, thank you so much for the entertainment. I just want to let you know thank you much for being amazing :).
`pleasure`
@@Saint-Sadistic666🤨📸
@@ilikeships9333 bruh i just found the wording funny
0:33 "we're growing so fast here on the flap channel" nice xD
new tank has flaps that increase cheeki breeki turn time for cyka maneuvers
Old tank*
You can tell that you are expert becuase of icon comrade
Flaps also make the tank immune to anomalies! Wich is veri gud for the Zone
God this is fucking cringy
The metal pieces on the MiG15 wings are called wing fences, they are there to keep the airflow chordwise (straight) as the airflow tends to go spanwise (towards the wing tip) on the swept back wing
Russians: let's add some flaps to our tank and make it better
Tank: +69 speed
THX FOR LIKES
Those flaps work as air brakes so they actually reduce speed. Shooting backwards though...
The "slat" armor on the M46 was supposed to deform the fuze of the shaped charge therefore reducing its effectiveness by widening the molten jet's impact point
"Its comin from phly daily first of all"-phly daily 2020
Youre kindof right. The Slats and wing fences do increase performance at low speeds, but they do it in different ways.
The wing fences just keep the airflow flowing over the wing smoothly when it wants to flow down the wing to the tip, which reduces the stall speed of the aircraft since it forces the loss of lift to come from airflow separating from the wing which happens at lower airspeeds than the airflow flowing down to the tip of the wing.
The slats reduce the overall angle of attack on the wing, change the airfoil to one with higher lift characteristics, and force air onto the top surface of the wing through the opening between the wing and slat that the slat moving into the deployed position creates.
Phly: Russian's are great at solving problems with minimal work.
Me: *Looks at the Chernobyl tragedy*
I would say minimal engineering rather than minimal work... look how they 'fixed' said chernobyl tragedy... just keep throwing people at it... I mean 'biological robots'...
Then take a look at Fukushima
@@clintlarvenz2570 And how else they were going to solve it smartass?
it was only caused because they disregarded the automatic systems in place to prevent things like that from occurring. it is a much cheaper solution compared to newer types of reactors which use water as a moderator for nuclear fission without water there is no fission however with RBMK they can refuel the reactor without shutting down because the control rods are its main form of moderating so no water is needed. making it an important feature of the RBMK compared to others in place. and finally the RBMK 2nd gen reactors are still use today.
it was not a perfect reactor and has some known flaws that was disregarded because it was deemed theoretically impossible to achieve without disregarding multiple safety systems in place, because of this the reactor operators where not informed of this information and didn't know that it was technically impossible to cause a runaway reactor in such a manner.
Well, fuck, don't forget that Russia (RSFSR part of USSR) was *the first country in the world to create Nuclear Power Plants* . Before russian NPP's , nuclear energy was used only for destruction of Japanese cities.
And... of course. Pioneers always are the first ones to face problems with new cut edge technologies.
BTW, shit that happened in Chernobyl happened not because of ''engineering was bad'', but because of human factor.
Also, Clint Larvenz
, you're...i don't even know what to say...
If they weren't ''throwing people at it'', huge part of Europe could've been demolished.
Sacrifices these ''biological robots'' did are more worthy than your and mine whole existing.
You’re on the right track with the MiG, they’re wing fences and it does have to do with airflow, as helps prevent the entire wing from stalling all at once in the event of airflow disruption like a stall.
Phly you should take out the Stuka with the 37s!
Tyler 76534 I agree I’ve seen the duck but I wanna see how it works
@PhlyDaily, since you asked: MiG-15's "wing fences" are there to minimize span-wise flow. They help, among other things, reduce asymmetric stalls - a bunch of other things too which slip my mind right now, but I just woke up. F-86's leading-edge slats are there for high-alpha maneuvering. LE-devices push Max-Lift to a higher angle of attack, and are pretty much required for high-performance fighters.
The flaps are there to slow it down as it comes in to land.
Patrick Ellis, the russians haven’t tried to fly a tank since WWII
The slats on the F-86 are used for landing, they automatically deploy by gravity if the airspeed drops low enough. The ridges on the Mig-15 are indeed to keep the airflow going on higher speeds. There were two tricks that allied pilots used in Korea. 1st, drag the Mig in a shallow dive until you hit nearly mach-1. Then the controls of the Mig seized and the plane would crash. 2nd, reduce the airspeed so slow so that the Mig would go in a spin witch he could barely recuperate or crash. With the slats the F-86 could fly slower and still be controllable.
Hey Phly! Could you please do this challenge? Thanks!
The *Heli-Bomber* Challenge!
Try to bomb an enemy ground vehicle at the beginning of a GFRB match with the Hind Helicopter of your choice with a *Bombs Only* loadout.
Good Luck and Enjoy the Challenge!
EDIT: It has been the number 1 comment on multiple of your vids. Please do it!
The side slats are effective because of the material used. The unit you showed with the screens does not stop the kinetic energy of the round it just detonated the heat round while still outside the hull. The slats on the mig-15 are to stabilize the air on the wing, the flaps/leading edge slats provide more air over the top of the wing for lower speed without loosing control and lift. The F-4 is just proving you can make a brick fly if you put powerful enough engines on the plane.
Who needs reverse gear, just rotate tank, assault a new direction
well the point of the T series tanks not have all but one reverse gear was that it would have made it more complex and take up more space in the vehicle. also it didn't fit combined war doctrine that the soviet implemented. have artillery destroy fortification and disorientate targets, helicopters to destroy vehicles followed with Tanks to destroy remaining targets followed by BMPs to provide supporting fire and suppress enemy positions while infantry dismount and deal with them.
@@mitri5389 I was making joke... he was complaining about the reverse gear. Thanks for killing it
Это же упораТЫ_ЛЕСНИК !
It was only a matter of time before phly played a tank that had phloppy woppys
3:22 your right. I believe it was called boundary layer fence.
So basically, the airflow in swept wings are both lateral and longitudinal. That results in a shock stall at the ends of each wing which diminishes the longitudinal stability of the aircraft. The boundary layer fence keeps the air from flowing along the wing to the fuselage. Basically forcing the flow straight and not hug the shape of the wing
“What would War Thunder be like if it was made by an American company?”
USA: Expen$ive.
Realistic ?
Bro and War Thunder isn't a fuckin money sink already???
"yes ivan, high br tnak pak"
"Yez Ivan, More helicopter."
"YES IVAN, LOW TIER TANK PACKS"
The soothing sounds of the russian arm remover 8:18
Title: "Modern MBT with Flaps?"
Tank: is 50 years old.
I know "modern"'s usage is relative to like, the Korean war, but still.
Maybe it's technically still in service in some third-world country right now, but I wouldn't consider it modern.
Ain't Abrams platform like 50 yo too tho?
@@1nEGOR its in the 40s I believe, I'm too lazy to look it up but I think it entered service in the mid 80s
Hey Phly!
Appreciative swede back here again.
The metal strips on airplane wings are called Boundary layer fences. It is, as you say, to keep the air going smoothly over the wing, but also to prevent the air from creating to much drag over the wingtip where vortices are created. That is why you have so called winglets on modern airliners. BUT slats and boundary layer fences are not the same thing. Slats are to create better lift at lower speeds together with the flaps.
Also, only arrow shaped wings have a use of these fences. So not many WW2.
Phly, how about we honor the emperor once again and we bring out the J7W1 with 4 sake bottle launchers
You haven't played it since 2014.
Attempt #96
For the love of god phloppy just give this man what he wants
Thou shalt not get your demands.
god how much times do you have to post this?! PHLY GIVE THE MAN WHAT HE WANTS!
Hey PhlyDaily,
Those metal fins on the Russian Mig are called Wing Fences, they keep the air flowing better over the wing at lower speeds. Like you said, Russian engineering works on the principle of "simple, but effective". The U.S. went more sophisticated with the slats. They work two-fold, first by increasing the camber of wing to provide more lift at lower speeds. Second, by pushing the air from below the wing up through the slot between the slat and the wing in order to "revitalize" the air flow on top of the wing, lowering stall speed.
So your statement was pretty close, minus all the technical jargon. I'm an aerospace engineer, so let me know if you'd like help for your future videos.
Do t-72 again please
9:02 You know what ISN'T depressing through?
The barrel.
0:31 10 million a Day??? Xd
lamberto 433 a joke obviously
Its True
Slats and flaps were primarily used for landing to increase lift over the wing at lower speeds
The Russian are also really good at solving problems with lots of soldiers
Only in in hollywood
The fins on the wings of the Mig are called wing fences and would keep airflow over the surface of the wing instead of sliding of the edge due to pressure differences
Its literally just mesh wire what do you expect, and the russian one is a solid flat flap 🤣 lOgIc?
With the Mig 15's wing fences, you are partly right. Swept wings like to push the airflow sideways, which causes the outboard wing section to stall easily. If the outboard section of wing stalls before the inboard wing, you nose up and stall further, and then you stall badly, enter a spin and crash. The wing fence just stops that sideways airflow, which in turn allows the stall to happen over all parts of the wing at the same time so it's more controllable.
The leading edge slats on the Sabre aren't for the same purpose, they're like flaps that you deploy to increase lift at low speed. They did put wing fences on some late model Sabres.
A better comparison would've been with the Hawker Hunter F6, which has a dog tooth leading edge on the wing, which generates turbulence that acts like a wing fence. Its purpose is the same, stop sideways airflow. The Hunter F6 was the first in the Hunter line to have this modification.
4:23 Lift on a plane wing is generated by making the air flowing underneath the wing move faster that the air flowing over the wing. Not the other way around. When you have air flowing faster over the wing that is called downforce and is what race cars use to go faster in corners on a race track
The metal flaps are wing fences (probably), wing fences are designed to reduce the movement of air diagonally across the wing (wash-in/wash-out) which reduces wingtip vortices which produce huge amounts of drag. Wing fences don't keep the entire wing from stalling though
The best thing about this is that the repair cost is only 2.8k and it pretty much has the same combat capability as vehicles of higher br
The problem with sweptback wing aircraft is that they are very difficult to recover from a stall in fact with this design the stall occurs at the edge of the wing, which means that the center of pressure, which is the place where all the lift is generated moves forward in front of the center of gravity. The result is a pitch up moment, it is called a deep stall. So to prevent the stall from spreading to the whole wing the engineers use the STALL FENCE, this device allows the air to flow smoothly on the wing even whilst the airflow at the edge is turbulent. Another way around are the slats, they re-energize the airflow and allow it to stick to the wing surface at a higher angle of attack they are used on almost all modern airliners and fighter jet nowadays.
That blade thingy on MiG's wing is called "wing fence". And there's a wikipedia article for it, cover pretty much all basic info you need. Long story short: "obstructing span-wise airflow along the wing, they prevent the entire wing from stalling at once"
The Fins stabilize air over the airfoil, so it goes from leading edge to trailing edge without sliding sideways so much. With the protruding nose, slipping air is a problem that leads to excessive turbulence and unclean airflow
The fins on the wings are roll stabilizers.
Meant to stabilize level flight and make the aircraft make a more predictable roll, instead of yawing while rolling.
Think of it as a mini rudder on the wings.
The fences prevent the airflow from deflecting outward due to the wing sweep - known as spanwise flow. Spanwise flow created dangerous low-speed/high angle of attack handling issues with many swept wing aircraft of the time. The spanwise flow reduced the "normal" flow of air over the outer parts of the wing, causing a tendency to pitch up and at the same time reducing the effectiveness of the ailerons. This could happen at any speed, but was most commonly seen at low speeds, and was often fatal if encountered during landing attempts (look up some videos on the F-100 Sabre Dane). Slats improved the airflow over the wing at low speeds, but were not specifically intended to reduce spanwise flow (although the mounting tracks/braces did in fact often direct the airflow back to toward the fuselage, having the effect of reducing spanwise flow).
Wing fences prevent the air from flowing spanwise on those swept wings. Span wise flow reduces the amount of lift the wing can generate as less air flows over the wing from the leading edge to trailing edge ( chord wise flow). Slats are just a way to change to curvature of the wing along with flaps to increase lift while also increasing drag.
The "metal fins" on an aircraft's wing are called "wing fences" Phly, they generate vortices off the trailing edge to help with stability - stop the entire wing from stalling at once
You're correct the F86 Sabre and Super Sabre have those flaps to allow the plane to slow down enough during carrier landings and not stall as well as to provide stability at low speeds during maneuvers. The Mig15 fins do the same thing essentially at low speed they trap low pressure air above the wing
And the reason the fence M60 sucks against HEAT is a that its a late Korea/ early Vietnam Era tank and the fence is really only for RPGs and TOW/KORNET missiles. HEAT shells are usually traveling much faster with more force and a heavier charge so the fence is minimal vs a solid plate used as a spacer. Not to mention the T64 is much newer with heavier/newer armor and its on the hull vs the turret
Flay wing fences are there to stop lateral movement of air.
With straight wing air will go perpendicular to the wing creating max lift.
With slanted wings it tends to split into 2 parts trying to go down the edge and perpendicular . This creates turbulence resulting in low lift especially at low speed.
Results are Saber dance. Watch F 100 Landing videos. And notice they also have Fences.
The explanation of how slats work is quite incorrect. Slats actually increase the area of the wings to increase lift at low speeds as well as temporarily increasing the chord. They are NOT SPOILERS!
The things on the Mig 15 are Callenburgh fences, they are there to prevent tip stall(air flow separating at the wing tips). A tip stall could lead to a loss of aileron control. Slats are there to change the camber in the wing and increase lift.
P.s this is not a complete explanation so feel free to add info
Wing fences simply put, are used to prevent the whole wing from stalling by separating the airflow.
The Soviets used them frequently, but other countries also used them occasionally
I believe the slats an the fence/fins solve separate problems. For example, NAA used both on the f100d with the wing slats allowing for higher AoA before a stall. Meanwhile, McDD used a dog tooth extension on the F4 to do the same thing as the wing fence; which is to prevent the stall of the entire wing.
Leading edge devices help change the camber of the wing to increase lift. I believe the things on the mig were to help direct the airflow, slowing for more stability
Wing fences like on the MiG-15 are common on the early jets. The early swept wings had problems with the crossflow and issues like the "sabre dance". Features like the wing fences working against the flaw.
HEAT don't work with a molten copper or whatever dart. It would simply splash against the armor plating because it's just molten metal and wouln't do any damage but scratching the paint.... The detonation of the charge isn't hot enough to melt the metal used in it. HEAT are also called "shaped charges" not only because of it's internal inverted cone shape (tip at the end) but also in the way they work. The detonation itself shapes the cone and pressures the tip at the end of the charge and simply squeeze/ turns it inside out to a dart. Basically cold forming of metal, but with an explosion instead of a hammer :D The dart, due to some nasty physics, then get's accelerated to approximately 10km per sec or 6,2 miles a sec. Then another physic rule has an impact: When a super fast solid body hits another solid body, the one who get's hit behaves like it's a liquid. So the pretty fast copper dart slices through the armor, like a hot knife through butter. That's why the holes of an HEAT impact look like it was molten.
If I had to guess with the reason why the M46 doesn't work well is because Gaijin's modeling for Heat penetration drop off is super wrong.
maybe because those cages are not made to stop heavy heat shells fired from tanks that travel much faster than a infantry launched heat round which is 10 times lighter...
Wing fences (as seen on the Mig-15) is to prevent airflow from accelerating and moving down the wing towards the wing tip. It is a stability device not a lifting device like the leading edge slats seen on the F-86 Sabre.
The MiG wing fences are to reduce spanwise flow and increase efficiency. Slats increase the wing’s effective camber, increasing lift, but also drag.
The little metal fins on the mig-15 weren’t for lift instead they were for landings, without them the plane would be going slow and the crosswinds would make it shake violently (especially with the f-100) so they added the metal pieces to the wing to help stabilize it while at low speeds landing or taking off
Aerospace engineer here (not P.E.); you're mostly right about the MiG-15 fins, but the slats at the front of the Sabre wing are basically more landing flaps, but at the front of the wing.
You're thinking of Dogteeth, those and stall fences do basically the same thing, but at different speeds and AoA. Slats are kinda different.
It's possible that the flaps work better because they are solid. The 'fence' armor has holes, which can allow the heat charge to pass through easier. a modern HEAT charge detonation moves at about 10km/s, so there's no chance for either material to move out of the way. Thus, you can imagine the spaced armor as, in this case, shooting an actual armor plate vs shooting through an open window.
Spaced armor is only useful against HEAT rounds when the gap is really big (min 700~1000mm), below that it really makes no difference. Spaced armor is mostly used to destabilize medium-low caliber shot before it reaches the main armor.
Slat armor is a completely different thing, it's not meant to detonate the round but shred it before it reaches the main armor behind.
Simply stated the wing fences/stakes are there to channel the wing over the top of the wing. It does two things. First it makes the wing more efficient. Two it makes the wing more stable in the yaw channel at higher speeds (AKA less squirrely).
Those things on the jet are called wing fences, they do help keep the air flowing from front to back of the aircraft, rather than slipping down the wing.
Slats at the front basically make the wing thicker increasing the distance air goes over the wing and causing a greater pressure differential and therefore lift. This will increase drag and slow the aircraft. The fences stop the air flow on swept wing from sliding to the wing tip. Increasing lift. Which also increases drag it always does you know increase height you slow its the lift. Think the wing tips of most modern airlines. They figured out further out the better I guess around the 70's.