(Tests done & screenshots from other players)
Several tests show P-51D-30 could only reach 580kph at sea level, and 550kph for P-47M, and 530kph for P-47D22. P-38 seems to be affected too. No other prop was found to have the same issue on speed drop near sea-level.
Those changes are not shown in the data-mine, no FM changes were found to contribute to these changes. Would like to know what causes it.
I‘ve checked drag related items as well as “MaxSpeedNearGround”, they were unchanged. Currently there’s no explanation on these changes. Furthermore, the F2G seems to be affected too with its sea level speed drops to 630kph.
Gaijin’s spaghetti coding aside - air is thicker at sea level so getting higher speeds on the deck will require more power than say, 10,000ft. That of course is offset by less oxygen the higher you go so engine performance begins to take a dip unless you start supercharging. Jets are less impacted by this latter bit, but the lesser drag up higher is still a factor.
However, if this is a change for FMs it should be universal - not whacking only a select few aircraft.
This is a bug, ever since the update both the weight and drag that are defined in the weapon file have been added to plane FMs.
For weight this makes no sense as it was definitely already included in the empty mass calculation, for the drag I would assume it was already included in the fuselage or wing drag for internal guns too. But since the m2_late has a "dragCx": 0.013, x6 you get a significant increase in drag.
Not all guns have a drag or weight modifier defined, which explains why only some planes are affected.
The F104S for example can take out its internal m61 in order to launch sparrows, however if you fly the plane with a gun now your top speed is significantly reduced since the drag defined in the gun file as "dragCx": 0.15, is now added on top of the total drag, which is nonsense for an internal gun of course.
In the same vein the A10s are now overweight by 860kg and can only turn at 5.5g max.
Not all guns are assigned with mass and drag, furthermore, the drag from the weapon installation (blasting tube) is already included in the aircraft drag. There’s no reason to include those drag in the FM calculation. The mass too was assigned during the aircraft mass definition(mass distribution with advanced mass = yes). Thus it is a bug.
It seems like Gaijin got bit by inconsistently modeling/coding weapons and drag… and with something like 1200 aircraft in the game, it might take a moment to fix that if they’re trying to change the way weight/drag are calculated and handled in game.
