F-15 Eagle: History, Performance & Discussion

The tropopause isn’t modeled in game, pretty much everything isn’t correct on high alts.

The tropopause marks where the standard temperature stops decreasing.

Are you saying war thunder’s atmospheric model has ambient lapse rate (2C every 1,000feet) continue indefinitely? I mean if anything, that would increase Mach numbers due to artificially colder temperatures.

i would agree that the 10k and 40k data points look okay, and really everything between SL and 40k is okay-ish. + or - 50KTAS i would call par for the course.

But the top two data points we are talking 130 and 210ktas respectively. that’s more what i was reffering to.

Feel free to record it and make a report, the same was done in the past for MiG-23 and others top speeds being insufficient and Gaijin did not make much adjustments because no one in actual matches is every doing this and it doesn’t really matter much.

you know, its almost like they are looking at the f15C. here’s a document showing its speed profile with the 220’s up high and it matches my test results really well.

https://web.archive.org/web/20221006023518/http://www.alternatewars.com/SAC/F-15C_Eagle_SAC_-_February_1992.pdf
Screenshot 2023-12-09 230856

As I said, you’re welcome to make a report if you think it’s inaccurate. Says F-15A/C on the manual which is the foremost primary document so anything that isn’t more authoritative than that is going to be thrown out usually.

Yes.

This only affects the thrust calculation in game as I understand.
If F-15 underperfoming in speed below 9km, then it’s missing thrust, if no - it’s fine.

thats what im saying, colder temps the engines perform better you go faster, IE higher Mach numbers. the tables themselves show this trend. i get this is a niche thing that likely wont see much use, but i kinda grew up around this bird, and its always been characterized as a Mach 2.5 aircraft… seeing it stop at 2.3M is kinda sad :/ even if its not useful, its more about honoring the airplanes legacy.

bug report.

https://community.gaijin.net/issues/p/warthunder/i/dEzPXK1gCSQL

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Another bug report; low speed sustained turn rate underperforming by 0.5-1G (below 0.4 mach).
https://community.gaijin.net/issues/p/warthunder/i/xywUJ4tRxUDO

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That graph is wrong, clean it does M2.34 with 102% thrust, which I don’t even think we have in game but the speeds match up so.

Max speed looks alright for me, it shouldn’t rip from reaching max speed though unless its between 27 and 37k ft as engine pushes it more and more.

This is for 97.7% engine trim. Much lower thrust than 102% trim

And the turn rates chart are for a 97.7% trim engine, 102% should provide even more G’s.

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What should be neat to model is the Vmax Switch as a boost.
vmax

Top speed increase using 4 sparrows and engine at 97.7% trim(not 102%+vmax)

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You’ll be unlikely to get it. The Tornado has a similar “combat power” setting that squeezes a bit more thrust out the engines but in game it’s set using the manual which excludes combat power and takes engines that are detuned by 2-3% to give a minimum baseline. Only jet I can think of that gets to use its limited time “boost” is the Mig 21Bis, and it may have been removed from that too.

mind linking this source so i can look at it?

Its the Performance Appendix A of the manual, using the PW-100 engine. Appendix B is the pw-220

They’ll probably add the SM Variant together with the f15c

Combat or boost thrust is not modelled in game for anybody so no


Is it true that the f15A’s wing has been fix? i played the f15A today and its wings kept breaking randomly when i tried to move the nose of my plane a little.

or the F15 is a plane that requires players to always pray that their wings don’t randomly break.

I got a longer and clearer recording but due to the 4mb limit.

report F15 wing breaking during light maneuvers, wings fix seem like did’t work as expected.
https://community.gaijin.net/issues/p/warthunder/i/9yZ10ZJE5wB6

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