Jumping accelaration chevrons

[YoYo]

After the update 1 - 2.0.1:

 

I noticed that near the constant speed sometimes this accelerations chevrons starts jump (flickering effect).

 

[FSKRipper]

Could not check it right now but could it be related to reaching transonic speed?

[YoYo]

Could not check it right now but could it be related to reaching transonic speed?

 

I noticed it when I was landing also.

[gospadin]

I made a quick video that shows the issue.

 

I can reliably get the acceleration chevrons to bounce if I dive at full afterburner to the aero drag limit at relatively low altitude, level out, then enter a 2-3 degree climb, still with full afterburner.

 

This was in DCS beta version 1.5.3.51171.34

 

[ame]

[/ame]

[Zeus67]

It probably cannot be fixed. The chevrons indicate longitudinal acceleration and obey a specific math formula. Since this is a simulator and not the real world, it is possible that under certain conditions the formula answer becomes a little "erratic" giving birth to the bounce you have detected.

It very likely will remain since probably it will take too long to trace the problem and fix it, with the added problem that the fix can actually break the formula even more.

Having said that, we will check the formula when we have time and see if we can fix that bounce, but as always no promises.

[0xDEADBEEF]

Gospadin, look at your Mach-Number on the top right of the HUD. It happens everytime between Mach 0.99 and 1.01 which is basically the speed of sound. As far as I've understood trans- and supersonic physics, Mach 1 is the speed where drag starts going up massively. My explanation is the plane is jumping back and forth between sub and transsonic speeds, and thus the drag/acceleration values jump depending if you are now above M 0.9999 or M 1.000 (What do you think Zeus?)

 

Basically you engines would be able to accelerate, but the extra power is lost in the transsonic drag area, and you can only go supersonic with AB. Think of it from a piloting point of view. If you are not currently in an active engagement, this throttle setting is incredibly ineficient. If you would throttle back until you reach M0.98 you would not only save a lot of fuel, but also get rid of the jumping.

[Rlaxoxo]

If you lower your afterburner to about 95% the things disappears and you waste less fuel

 

I know it's not a perfect solution but ...

[gospadin]

Gospadin, look at your Mach-Number on the top right of the HUD. It happens everytime between Mach 0.99 and 1.01 which is basically the speed of sound. As far as I've understood trans- and supersonic physics, Mach 1 is the speed where drag starts going up massively. My explanation is the plane is jumping back and forth between sub and transsonic speeds, and thus the drag/acceleration values jump depending if you are now above M 0.9999 or M 1.000 (What do you think Zeus?)

 

I can confirm it happens at mach 1.03 as well.