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F-16 magnetic compass and INS heading bugged


Machalot
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I loaded a brand new jet parked at Kutaisi. The magnetic compass read ~150. I checked the F10 map and 150 was about 30 deg off the nose of my parked aircraft. The nose was pointed south-southeast. INS seemed to align correctly to 188.

 

These screenshots were all taken during initial power up sequence. Captured magnetic heading prior to power up, then allowed the INS to align, then compared against F10 map.

 

Screen_200823_212350.thumb.png.f08bf91ed543d744e2c29a1b9fd28e42.png

Screen_200823_212400.thumb.png.7a21be3e64e790299711a9eaff2ff7a3.png

Screen_200823_212405.thumb.png.81412fc7f8c69994cdb300b91a011743.png

 

 

This bug also seems to affect the INS alignment. Later on I was flying south out of Sochi (181) and my magnetic compass showed N, nearly 180 deg off from my actual heading. I turned of the INS and did an In-Flight Align using 181 as the input heading. The INS showed 042 deg after the In-Flight Align completed, and the HUD showed 107.

 

 

 

This is really screwy.

 

 

This is with the latest open beta.

DCS Open Beta 2.5.6.53756

Windows 10 Home 64-bit, Version 2004

32 MB RAM, 250 GB SSD

 

AMD Ryzen 5 1400 Quad Core at 3.2 GHz, overclocked to 3.7 GHz

NVIDIA RTX 2070 Super

Oculus Rift


Edited by Machalot

"Subsonic is below Mach 1, supersonic is up to Mach 5. Above Mach 5 is hypersonic. And reentry from space, well, that's like Mach a lot."

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Also affects the F-86. True heading of the aircraft at startup is about 240. Directional gyro says 240 prior to power up. Magnetic compass says 210. After power up, directional gyro snaps over to 210. The error between the aircraft's navigational equipment and true heading is about 30 deg.

 

 

Screen_200826_013844.thumb.png.4826472b8045a387a7fac6f9a8521d15.png

 

 

Screen_200826_013656.thumb.png.e26f5a33b1d947f3b19c3341e78dc655.png

 

 

Here's the track.

 

 

Aerobatics Online Caucasus OpenBeta-20200826-013548.trk

"Subsonic is below Mach 1, supersonic is up to Mach 5. Above Mach 5 is hypersonic. And reentry from space, well, that's like Mach a lot."

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  • ED Team

F-16 magnetic heading not showing in DED only true heading is reported.

 

thanks

smallCATPILOT.PNG.04bbece1b27ff1b2c193b174ec410fc0.PNG

Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status

Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2

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F-16 magnetic heading not showing in DED only true heading is reported.

 

thanks

 

Hi BIGNEWY, I don't understand your response. The issue I'm having is that the magnetic compass heading is wrong by a huge amount compared to the true aircraft heading reported by the F10 map. It is typically off by 30 deg error but I have seen much larger. This affects the F-86 as well as the Viper. Please look at the screenshots and the short trk file.

"Subsonic is below Mach 1, supersonic is up to Mach 5. Above Mach 5 is hypersonic. And reentry from space, well, that's like Mach a lot."

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  • ED Team

Hi

 

thanks for the support ticket, yes I mixed up your issue with another issue with the f-16 specifically.

 

I have been unable to reproduce your issue so far, I will have another dev check

 

thanks

smallCATPILOT.PNG.04bbece1b27ff1b2c193b174ec410fc0.PNG

Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status

Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2

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  • Solution

I seem to have resolved this issue by deleting all the contents of Saved Games\DCS.openbeta\Data\MagVar\TabularData.

 

 

It contains a bunch of .bin files that were apparently corrupted and causing bad compass readings. No idea how that happened though.

"Subsonic is below Mach 1, supersonic is up to Mach 5. Above Mach 5 is hypersonic. And reentry from space, well, that's like Mach a lot."

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