SAAF JAS-39C Technical Data and Discussion

I’ve never done these tests myself since I don’t have access to WTRTI and other resources on console, and I’ve been away quite a bit in the past 18 months so I’m out of the loop but my opinion at the moment(not that it matters) is basically based on that I recall people saying it was “close enough/overperformed similar to everything else” after the last nerf, mig23 saying it was subsequently underperforming quite a bit in acceleration as a result of it (but also that he believed it should be ~2° worse STR, but he couldn’t prove it with available info(?), and that he felt it was hopeless until they properly modelled the instability) and then on the FM report 9 months ago devs claimed that it was pretty much accurate based on data from “other sources”

dev response

The data from other sources suggests the turn rate for 50% fuel load and 4 missiles to be 13…14deg/s at 15 000ft. The Gripen’s performance in the game is now matching these figures, as it is 13.5deg/s with 2+2 missiles and 50% internal fuel at 15000ft.

Which I assume is the AerMacchi source, based on the figures mentioned. Which is interesting since we rarely get any insight into what sources Gaijin is using.

Not saying it’s accurate right now, I think it’s a mess like all FM’s. I was just questioning why the latest report made the assumption that they used ingame values for old Viggen FM to make the Gripen FM as I never had the impression anyone used ingame Viggen data. But I see now why one could make that assumption based on the supposed over performance alone

You’ve taken a far greater interest than me in everything flight-model wise and I’ve seen some of your videos which are very cool. Not to beat a dead horse but I think an interesting topic could be to compare different aerodynamic configurations STR/SEP performances with each other at similar TWR’s and/or wing loading values, by trying to match those values using fuel-loads and whatnot. Not an easy task with the limited information that’s out there though. We already have a pretty good idea on why they chose certain designs over others, but understanding the energy (SEP/STR) impacts those designs have across the flight envelope would be interesting

Very interesting, so over performing pretty significantly at M0.55+ based on the JA37 charts, but fairly accurate at low speeds? Also I’m a bit confused why is the ‘statshark’ one so high? Is that the old Gripen FM?

statshark just in general over estimates delta canards (overestimates eurofighter as well)

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I’m just gonna sneak in here and bat for my report on the radar: ( Community Bug Reporting System ) ^^

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JA37 atm has ever so slightly too little drag in one or two cases but also is a bit too heavy and the thrust levels out too early in game
as for Sustained its fairly accurate to what we have

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Can the jas-39c mount brimstones or is that something only the grippen e can?

It can but I don’t think any Gripen in service have mounted them. Up to Gaijins discretion to add things like that

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They can mount them according to saab brochures but I don’t think they have actually been mounted

I agree

Is it just me that got mandela effect, was PS-05 got nerfed? From what I remember, it had 140 Degree scan, now it’s only 120 degree.

I don’t know if there were any changes but 120 deg is correct to my knowledge.

image

( https://web.archive.org/web/20200705231702/http://saab.com/globalassets/commercial/air/sensor-systems/fighter-radar/ps-05a/product_folder_ps-05-a-mk4.pdf )

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Yes, it got changed very recently from 70 to 60 degrees, unfortunately it’s actually more accurate to real life.

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https://community.gaijin.net/issues/p/warthunder/i/awbmP6zR6bli

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This Gripen at 13.7 and seeing 13.0-13.3 is eating good right now

its only getting better for it once top tier moves to 14.7 or 15.0

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Is there any numbers about the thrust increase ? I saw news about the modernized engine for gripen c/d but couldn’t find anything going in details.

When i fly a plane with BOL i use a macro that dumps ten chaff in one second with each click, makes it work like high caliber chaff. But i dont use those planes often because im worried it can get me banned lol

That does sound quite effective and would probably save me from breaking my keyboard :D

Though they really need to make it so that there is a setting to enable press & hold CM release

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They have a setting for that with helicopters and its even more effective than a macro, its erroneously missing from planes, i made a report for it but it was ingored. Community Bug Reporting System

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There is a suggestion up for it too

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Not entirely sure, though it may be ignored as Gaijin has a balance that they want for the Gripens which is why none of them correctly represent any Gripen model in game.

If you really want answers I’d ask in a thread that has a Gripen that actually has money for upgrades or actual discussion.

Gripen E thread tends to divulged to the older models and some fairly knowledgeable people are in there.