The engine is real. The engine exists. We have great test data on it. This should be the engine we have in game. This is a demonstration of what is possible. I also provided the NASA article where even more advancements were made later on, including even more thrust improvements, climb improvements, and fuel efficiency. The MSIP program used this knowledge to improve the F15. This means we should have far more power.
The standard set by the snail is that only 1 needs to exist for it to be in game. The Yak-141 is a great example of this. The R-79-300 for the Yak-141 never left the test stand. The R-79V-300 was the only engine to fly. Proof that we only need the stats from one for it to be in game.
The world record for that kind of plane is 90,000ft in 3 minute and 27.8 seconds. The games aircraft is way too weak to do this.
This is a failed test. Took 1 Min 10 seconds and you reached altitude at Mach 0.56 (Should be Mach 0.9). For the test to pass, you would have to make 40,000ft and be at Mach 0.9.
Also keep in mind, they were able to improve the engine performance later on by 25% at maximum AB. So you should be beating the time not falling behind it.
So I get a difference of 8 seconds to 39K feet with a plane that is vastly heavier, had to pull a much harder turn to 80° because of my incompetence and is carrying draggy missiles at the start?
That seems to be perfectly within the margin of error to me considering I got within 15% of the actual data with a much heavier plane and while it’s “stock” so Gaijin stole a couple seconds from me anyway =)
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For the test to be a success you would have to arrive at 40,000ft at Mach 0.9. You arrived at Mach 0.55. The Missiles aren’t going to slow you down to half speed. The aircraft is a 1.6+ Thrust to Weight ratio. Make it work in game. You shouldn’t be losing speed.
It’s not a failed test at all.
If the plane stayed any faster while climbing up, the times would have been much faster as well. The plane was also vastly heavier so it will naturally lose more speed while climbing.
I bled a lot of speed during my pull-up with means I got less ram-air and less intitial thrust during my climb phase.
Your claim is for a plane that is barely 1 ton heavier than the empty weight of the F-15A… If I had taken only 1 ton of fuel I would have still been vastly heavier from the ammunition, weaponry I had with me and the fact that it’s not a demonstrator used for climb records…
The fact that the F-15 arrived at 40K feet at Mach 0.9 makes no sense to me. How is that supposed to work by the way?
My time was barely off and I was at 0.54M at the end. If I still had that much speed I would have undershot that target drastically.
I will do another test after walking my dogs, with a reference aircraft and with better management. Let’s see the times we get then and compare those.
EDIT: Also: at 40K feet the F-15 in my video was still going Mach 0.77… I don’t know where you get the 0.54 from…
0.77 with a gimped stock plane that’s not a specialized test variant vs 0.9 on a heavily modifed test aircraft seems pretty okay to me…
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I am not the one who programmed the game and needs to fix it.
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They made improvements into the 90s which increased the engine performance by 25% (per NASA).
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They reduced fuel consumption in the same process (per NASA).
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The benchmark is. 40,000ft @ Mach 0.9. Not up to me to make it work. But clearly they have entirely too much drag going on as well.
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8 x AMRAAM = 2850lbs. Or 10% of the vehicles weight.
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The Aircraft is a 1.6+ Thrust to Weight ratio clean.
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10% of 1.6 = 1.44 Thrust to Weight Ratio.
This means its still a positive TWR. So the aircraft should arrive at 40,000ft near Mach 1. Even with armament. If we can’t do this in game, then the game has the aircraft modeled wrong.
Lastly… Now take the ADECS and DEEC improvements which NASA talks about. Add the 25% performance increase and the 16% lowered fuel consumption.
In short, we should be climbing faster, retaining more speed, and using less fuel all around.
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Where did you find this source?
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The empty weight of the standard F15A is listed at 28,000lbs. The Climb graph I gave you is 28,653lbs when it rolls. Minimum fuel, clean configuration, should be at Mach 0.9 at 40,000ft. Read my other post on why it should actually be BETTER due to improvements in the engine in the late 80s/90s. We have the 2000s model, so these should be reflected.
Here is another good test. With 8 x Missiles. + Centerline Pylon. 50% fuel load. (28,000lbs + 12,800lbs fuel + 4,000lbs missiles) the aircraft should:
- At 10,000ft
- At 102% Engine (Not 110%).
- Accelerate from 250 KCAS to Mach 1.2 in 40 seconds.
Note this is with the OLD. Not improved engines.
It gets worse if you use the lower power settings like the time to reach Mach 0.9 is supposed to be 30 seconds in the F15C. Same loadout. I tested this with my Spaded F15C and it took 1 minute exactly. Or twice as long:
42,000lbs. Center Pylon. 4x Aim-9, 4x Aim-7. 50% Fuel. Engine power 95%:
To complete this test properly it should take no more than 30 seconds in Test Flight. (Standard Day, Sea level). @Markus752 Can you hit the time marks? I cannot with the proper load out in the F15C (and mind you this is notated with the non-upgraded engines so you should be fine).
I’m assuming that this is unclassified, so put it in a bug report.
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Engine trim =/= in-game throttle.
@DocUSMC where did you find this source
Why do you think the F-15A in the US tree is a 2000 model?
I don’t know which model it is so I am interested in your source.
Also, again. It did 0.77M at 40K ft with a “stock” plane ina video game that artificially nerfs planes until you spade it…
The graph is for “MAXIMUM THRUST” which is 110% throttle in game. Engine trim is not the same thing as throttle setting.
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Also please note that 102% power in real life is not the same as 102% in War Thunder.
As an example:
The P-47M should have 2300HP at military aka 100% power and 2800HP at WEP.
Ingame it has 2100HP at 100% and 2800HP at WEP, unable to achieve 2300HP without ADI.
The D28 at 100% does have 2300HP…
You would need to know the exact weight and the thrust of the aircraft at any given time, which is pretty much impossible.
Mach 0.55. And I would like to see someone hit the time marks for acceleration.
It is as close as we can get in the game. Especially since everyone except for a couple Migs are missing true emergency power. So that is what we have.
?! Where did you get the Mach 0.55 from?
40K Feet is 12,192m… In my video the F-15 is exactly at 0.77M… at that altitude.
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You are fundamentally misunderstanding what engine trim is. It is not a throttle setting or anything like that.
Engine trim is a setting in the engine control unit which slightly adjusts the various limiters in the engine to optimise the engine for either better engine life or more thrust. 102% is the highest thrust trim option available and it is what the in game aircraft is modelled as using.
So no; the correct way to test that graph is with 110% throttle in game. That is how you actually recreate maximum thrust with 102% engine trim.
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I just re-did the test with the F15C.
- 10,000ft
- 250 KCAS start speed
- Throttle to 100%
- 4 x Aim-9, 4 x Aim-120a (mind you these are lighter than Aim-7s from the flight manual).
- No CFTs (which means the aircraft over performed for the test).
Took 48 seconds to go from 250kcas to Mach 0.9 at 100% throttle.
Target time by the flight manual is 30 seconds.
Note, this was with the fully upgraded engines in game, the flight manual is with the pre-update engines.
Anyway you flip it. The aircraft is performing wrong.
Still doesn’t work as that was not the maximum thrust test.
100% throttle in game is “MILITARY THRUST” in real life. And according to your graph accelerating from 250 KCAS to Mach 0.9 should take 80 seconds.
What on earth are you even trying to test?
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