Are you trying to say that the canards try to level out the plane when the rest of the plane is trying to make it turn?
Because that would be very dumb.
He is right though. In this video you can see the canards deflecting down when the aircraft is flying at high AoA (0:30 onwards):
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That is exactly what they do IRL :) (well, not trying to level out, but angling down in relation to the rest of the plane)
the JAS39 is statically unstable and wants to inherently do a backflip if no other correcting inputs are made, so just a tiny bit of pitch up to the canards will make the plane start the “backflip”, the canards then have to pitch down to stop the backflip and keep the AoA and thus do a turn. The canards are usually angled just above the direction of flight (not where the nose is pointing but where the “wind” is coming from i.e. “below” the planes belly). Its kind of hard to describe with words. so using this image as reference:
The canards would then be angled a bit above the trajectory (relative wind) so will still “add” pitch up in relation to the wind but below the longitudinal axis as to not add to much and flip the plane. Had the canards been straight or even pitched up then the plane would have gained even more alpha and stalled out VERY quickly.
If i have understood things correctly then the reason for them acting like they do in game is because no plane at all is modeled to be statically unstable as the game-engine cant handle those situations/calculations as it currently is, everything is just flight models adjusted from “normal” stability to resemble the IRL capabilities.
Edit:
Some spelling and clarifications.
Edit2:
This video shows it very well:
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Ahhhhhhh, I have misunderstood. My bad. I was thinking of manoeuvring at high AoA at speed during a hard turn. The slow speed AoA demonstration was not what first came to my mind hahaha.
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Even during high speed and hard turn they point down, the plane is just THAT unstable. The last video at the end of my previous post has some quite hard turns at like 1:05 and the canards still point down compared to their resting position and the plane.
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To me at 1:05 as you mentioned it looks more or less straight there (hard to tell with the fisheye lens), but yeah I see your point.
The canards don’t deflect upwards nearly as much irl as in game
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If you look at 2:17 in that video you see them going “up” for like 1/4 of a second, so you have something to compare to when they are “straight”. Easiest to look at the front point of the canards as it is VERY clear if they are straight or pointing up as you suddenly see the edge there :P
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Ah yeah, can see the rear edge as well there. My bad, I was mistaken.
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No problem at all, very easy thing to mistake as it is very counterintuitive x)
This video also shows it super clear, the canards don’t even go to the straight position for the plane to start turning, the start angling up towards the “middle” position but never even reach it and then back down again and the plane still turns x)
(Timestamped to 1:06):
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Ah yeah I see, do you know if this also is the case at high speed, closer to/above Mach 1? Cause most of these videos are at slower speed, air show type stuff you know.
It’s likely going to behave a bit differently around mach 1 plus minus mach 0.2 (The transonic area) due to how weirdly air behaves at those speeds. But i don’t currently know anything concrete on how the canards behave there :P what i do know however is that the pilots have the option to turn of the canards at super sonic speeds and let them “free flow” in the airstream to reduce fuel consumption.
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I think I have read that (usuallyin case of damage) the canards can free flow at lower speeds as well which would make the plane aerodynamically stable as it would bring the centre of lift father back. Not sure if that is how it works but I have read it somewhere.
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Yup you got what I meant, sorry if it was a bit confusing, I was just wondering why it is working that way in war thunder since any other Canard aircraft actually put them down to compensate for relaxed stability…
If you look at the rafale or typhoon, they angle downward
Does anyone have any concrete performance charts for the JAS-39C?
I would like to do some extensive tests on rate of climb and I am most interested in high altitude performance.
Climb rate seems to take a huge hit above 8km as well as acceleration being much slower than I’d think it should be, but since I can be wrong I wanted to collect more data about the flight performance so I know which data points I have to compare.
If you know of any books that are offered online that offer some insight, please share a link I am happy to buy something if I have to.
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You’re not wrong.
Currently Gripen underperforms in terms of high altitude and time to climb performance.
Might be easier to find documentation on the cruise/supercruise performance of the Gripen C. Increasing that would decrease the drag on the Gripen and therefore increasing acceleration and climb-rate.
any news on the report ?
Nothing yet.
thanks for the reply
Do you guys think they will give the saaf gripe meteors? Even though it never used them?