F15C Engines Underperforming Proof

[DocUSMC]

So lets stick to the F15A so you aren’t as confused.

Engine thrust according to NASA = 27,000ftlbs on the F100-FW-100. Same engine you have in game in the F15A but with only 17,600ftlbs. 17,600ftlbs is actually found on no documents anywhere.

NASA > Gaijin for facts. Pretty simple.

How about another NASA test document: https://ntrs.nasa.gov/api/citations/19790022017/downloads/19790022017.pdf

“The F100 engine is in the 25,000 lb thrust class with an overall fan and compressor total pressure ratio of 23 to 1” Page 3 Dated 1979

Also these tests are more accurate according to NASA “These results were compared to efficiency levels calculated from the engine system thrust measurements made in the PSL facility tests. This reduced the relatively large degree of uncertainty normally associated with calculated augmentation combustion efficiencies.”

In game Thrust = 17,600ftlbs

NASA Tests = 25,000 to 27,000ftlbs.

@Markus752

You call my tests failed, yet you are the one absolutely shitting the bin and setting the dumpster on fire trying to push your agenda when it’s pretty much clear to anyone with a brain at this point that you are clearly unable to comprehend your own sources.

Two sources, both NASA, which one are you unable to understand?

[MaMoran20]

Dunno if you are doing it but you should actually use the calculation for fuel amounts. Take into account armament weight aswell

[DocUSMC]

I did, I ran the test with the proper fuel load, CFTs, armament etc. The aircraft should be 52,000lbs for the test and have the CFTs. I was not able to even match the F15C Flight Manual benchmarks with the F100-PW-100 engine despite having the F100-PW-200 in my aircraft. Slower times, with the newer engine…

[AlvisWisla]

War Thunder’s F-15 engines do not produce 17,600 foot pounds.
Stop spreading disinformation.

Gaijin and F-15’s manufacturer > Your posts’ lies.

F15C Engines Underperforming Proof

27,000 foot pounds / 2.2 = 12,272.73 kgf. In-game: 14,150kgf. x 2.2 = 31,130 foot-pounds. [Screenshot 2024-08-15 081911] 13,300kgf at 0.94 mach. x 2.2 = ~29,260 foot-founds. [image]

Not sure why you want to nerf the F-15 so badly…

[MaMoran20]

Don’t use the f15c with the f100. Its different engine

And this is supposed to be the pw100 on the f16, remember that f16’s don’t control airflow velocity which is especially useful at high speeds and high altitudes where the F15 flies

Take this with a grain of salt as it estimated

[MaMoran20]

Cfts

Clean

Weight &stuff(dont forget to add pylons aswell)

Test at 40k ft to actually see the biggest discrepancies in acceleration

[MaMoran20]

This guy calculated the stuff with different engines already a couple years back

[UnknownDistance]

@DocUSMC

Engine thrust according to NASA = 27,000ftlbs on the F100-FW-100. Same engine you have in game in the F15A but with only 17,600ftlbs. 17,600ftlbs is actually found on no documents anywhere.

This is thrust graph for F-15A that is generated from in-game files. It makes over 27,500kgf of thrust.

This is thrust graph for F-15C which peaks at 28,500kgf of thrust.

If anything…the F-15A and F-15C are over-performing in the thrust department.
So once again…you are wrong and have no idea what you are talking about.

[DocUSMC]

I am not sure where this file came from. But here is the engine specs from inside the code right now:

F15C: Current Update

It peaks at 21,000lbs.

F15A: Current Update:

Peaks at 18,000lbs.

I would be interested in that graphs source as of this update, because the game has it coded and hard locked to different numbers.

[MaMoran20]

Yet, you can see the f100 engine on f16 easily going above 30k lbf… 2 makes 60k lbf.
Same on the other pics

F15C clean at 10k ft performs as it should from my testing but its at higher altitudes where it is lacking in thrust. Lower acceleration and similar top speed than the F15A when it actually has a higher top speed, better acceleration and high ceiling than the A

[FlipAllTheTables]

Those are not thrust values. They are altitudes.

Not to mention the values written in the files are NEVER imperial. So it wouldn’t be lbs.

[UnknownDistance]

The program generates the graph from the in-game code.
Static thrust is not peak thrust.

Current peak thrust for F-15A is 28,000kgf between 2 engines.
That is 14,000kgf per engine.
14,000kgf x 2.2 = 30,800lbf

So the engine in the F-15A is actually over-performing.

[Flame2512]

@DocUSMC

It peaks at 21,000lbs.

21,000 is an altitude. Not an amount of thrust.

You need to stop picking out random numbers from all over the place just because they look convenient.

[MaMoran20]

@UnknownDistance

So the engine in the F-15A is actually over-performing

Nop

[UnknownDistance]

Docs suggestion is that peak thrust should be 27,000-lbf.
The current engine makes 30,800-lbf.

So by his estimation and sourcing it is over performing by 10 - 15 percent.

[MaMoran20]

@MaMoran20

Yet, you can see the f100 engine on f16 easily going above 30k lbf… 2 makes 60k lbf.

^^^^
And as far as I know when I tested F15A clean acceleration charts, they matched back in december

Not arguing his point, lower thrust and F15A wouldn’t match…

F15C doesn’t match already at 40k ft but does at 10k ft

[UnknownDistance]

I am going based off of the source that Doc wants to use.

I already know that the engine thrust graph already is closely matched to the one that was posted earlier.

[DocUSMC]

@Flame2512

21,000 is an altitude. Not an amount of thrust.

You need to stop picking out random numbers from all over the place just because they look convenient.

It literally says “ThrustMax”: and then gives numbers that coincide with the stat card. I don’t think so. Those are the maximum thrust values. Here is the SU-27SM Listed with a maximum thrust on the stat card of 24,400. Max thrust in the code ends at 25,000…

It is under the section for Maximum Thrust. I would need to hear why you think its not a thrust value because the SU-27SM isn’t flying at 82,000ft in game…

[DocUSMC]

@UnknownDistance

I already know that the engine thrust graph already is closely matched to the one that was posted earlier.

I don’t trust the graph more than I trust the raw numbers from the code. Unless the program will show what code it used and where it got the different numbers. I can see these with my own eyes.

[UnknownDistance]

You can’t even pick out the right sections of code.

You can look at thrust values in AlvisWisla screenshots posted earlier and see that they basically match the graph.