I have experience with coding Mods for IL2-1946 and I would say the bug might came from the FM-data calculation module, inside the program of the game ( not the blkx). And that module was for all 1200 types of aircrafts in the game. It may be a matter of commenting a few lines of code to get the problem fixed.
The problem is that the developer has to be informed with the issue and be aware the location of the code.
It’s not just sea level… I just did a test of the P-51D-10. I repeated a test I made just before the patch dropped. I did a simple climb to 6000 meter. WEP, MEC - 100 pitch, 80/80 rads.
You can see speed and alt on the graph, time on the x-axis. The pre-bug (pre-nerf?) P-51D-10 needed ~314 seconds to reach 6000 m and the P-51D-10 today needed ~342 seconds. That’s not an insignificant difference in climb performance. The ~10% difference in total time is manifested in climb rate throughout.
For the interested… this was from a test I goofed. Ran the “old” FM at ~4300 meters, the new one at ~4500 meters. This is level acceleration from 300 kph to 400 kph. The old D-10 needed 30 seconds, the new D-10 needed 32 seconds. The old D-10 pulled out of its 20 deg dive in 30 seconds, doing ~705 kph. The new D-10 pulled out of its 20 degree dive in 32 seconds… doing ~705 kph. I accidentally experimentally determined that you need an additional 2 seconds and 200 meters of altitude to reach 705 kph from 400 kph in 20 degree dive.
A Mustang pilot (at least a D-10) will now need to trade more time/distance/altitude for the same speed while also needing longer to climb. Bad deal all around.
Maybe I should have led with this… here’s the drag plot for the P-51D-10 for the 6000 meter climb, plotted versus altitude.
Why they gotta keep nerfing the US? The planes rely on speed, surely if the nerf the speed then they drop the br
https://community.gaijin.net/issues/p/warthunder/i/p7v11ob7K0Ui
It might get closed as a dupe, but I made my own bug report for this. Ran out of “allowance” to attach game logs… but they cannot NOT know about it at this point… right?
Here’s the F4U-4 and the F8F-1. The F8F-1 pre-patch data was to 4500m, but the difference is still obvious. The F4U-4 contextualizes the nerf by plotting the pre/post-past performance against the Yak-3. Pre-patch, the Corsair lagged the Yak-3 at low altitude, but could “meet” it at 6000 meters. No longer… the Corsair now substantially lags its pre-patch self AND the “low altitude” Yak-3.
Here’s the climb rate comparison.
Here’s SEP.
That’s a pretty significant shift in relative performance, especially considering the altitude most matches occur at in the current meta.
Oh, and because I forgot the drag plot again…
For anyone interested here is the data on which guns are affected by the bug, which aren’t and by how much:
