HSD (y-axis) and HAD (both axes) cursor acceleration issue

[Northstar98]

Hi everyone,

Certain pages in the F-16 have the cursor move at inconsistent speed when changing direction, leading to it appearing to jump. It's most commonly seen when going left/right and then adding some up/down.

As far as I can tell the following are affected:

• The HUD (for instance, CCRP, DTOS, Maverick VIS etc).
• The HAD page (though the cursor does move more smoothly - as if its position is updated at a higher rate compared to every other page. Unsure what the rate should be).
• The WPN page for HARM.

Everything else appears to work as it should and motion is predictable (though the rate at which the position is updated seems to be lower than the HAD page).

No other module appears to suffer from the same bug (the A-10C for instance is very smooth and very consistent, with the exact same control on my stick bound), there are also no conflicts in the control set up.

F-16_cursor.trk

[BIGNEWY]

Hi NorthStar 

the team have tried to reproduce but are unable, could it be hardware related? maybe adding curves or a calibration would help? 

thank you 

[Northstar98]

5 hours ago, BIGNEWY said:

Hi NorthStar 

the team have tried to reproduce but are unable, could it be hardware related? maybe adding curves or a calibration would help? 

thank you 

All I can say is that with the exact same control bound, using the exact same settings (curve, saturation etc), with the same calibration, this issue is not seen on any other module, or any other page of the F-16 (such as the HSD and the FCR).

Here's a video to show what I am seeing (this is after a recent calibration):

Note the following:

• The FCR and HSD pages don't show this issue - the cursor behaves entirely predictably and there are no sudden rapid accelerations - all good.
• However, the HAD, HARM WPN page and the HUD (here shown in DTOS, but the same applies to say, Maverick in VIS mode or any other mode using the HUD's cursor), show sudden, rapid accelerations when the switch is moved in a circular fashion.
• When I make just max X or just max Y inputs, the cursor generally moves more slowly and sudden, rapid accelerations are less frequent (though not entirely 0, you can sometimes still see the cursor suddenly start moving very quickly).
• The bug appears to affect the Y-axis more than it does X.
• The sudden, rapid acceleration of the cursor occurs when changing direction.
• Towards the end of the video I show my control bindings, you can see that my control moves as smoothly as I make it move. It properly re-centres to 0 and I can move it to the extremes of either end without any observable jitter.

 

Here's a video showing what happens when I try another module, here I try the A-10s TAD cursor and the HUD cursor - note how there is no sudden rapid accelerations and the cursor behaves completely predictably and is generally very smooth. I also again show my control bindings and test, you can see that the exact same control is bound and (aside from not being inverted) the same exact settings are used:

Every other module I've tested (A-10C II, AV-8B, F-4E, F-14A/B, F-15C, F/A-18C, Ka-50, Mirage 2000C, Su-25, -25T, -27S, -33) work as they do as seen in the A-10C video - smooth, predictable motions, with no sudden rapid movement - if I move the control to it's maximum values the speed of the cursor stays clamped. It is only the F-16CM and only for the HUD, HAD page and HARM WPN page that exhibit this issue, other pages (such as the FCR, the HSD, the Maverick WPN page, the TGP page etc show no issues). 

 

VKBsim Gunfighter Modern Combat Pro {1C884E80-2E03-11f0-8009-444553540000}.diff.lua VKBsim Gunfighter Modern Combat Pro {1C884E80-2E03-11f0-8009-444553540000}.diff.lua

Edited June 17 by Northstar98

[Dawgboy]

Similar Issue?

I wonder if this is a similar issue, @Northstar98?  

[Northstar98]

6 minutes ago, Dawgboy said:

Similar Issue?

I wonder if this is a similar issue, @Northstar98?  

The exact same issue as a matter of fact 

Apologies @BIGNEWY @NineLine, this was already noted (the issue has been present since the F-16 received these pages) previously but I searched the wrong subforum (and subsequently posted to it too), though that issue is not reported either. This though should be merged with the linked thread as it describes the exact same bug (though the linked thread doesn't seem to mention the HUD, though it is affected).

Edited June 17 by Northstar98

[Dawgboy]

2 minutes ago, Northstar98 said:

The exact same issue as a matter of fact 

Apologies @BIGNEWY @NineLine, this was already noted (the issue has been present since the F-16 received these pages) previously but I searched the wrong subforum (and subsequently posted to it too), though that issue is not reported either.

Won't hurt to resurrect and connect with the old post...<grin>

[BIGNEWY]

threads merged

[ThisWillHurtU]

I'm experience the same exact problem. I am using the S-TECS MODERN THROTTLE MAX STEM XT2 v2.196. I can provide my thottle .cfg file, hopefully it helps. This bug makes certain F-16 MFD pages very hard to use. Other aircraft MFDs work fine; no cursor jumping.

S-TECS MODERN THROTTLE MAX STEM profile 1.cfg