Folks - in the C172, any change to the heading indicator dial is always linked to the current compass heading.
For example, f I increase the gyro heading indicator direction, the change always reverts back to the current compass heading.
I have tried turning “auto drift” both on and off with the same result.
It’s nice to be able to adjust the heading indicator a bit, especially if tracking a VOR radial. But, as soon as I change the heading indicator, its value goes immediately back to the compass heading.
Any ideas??
Pete
Are you referring the the C172 steam gauge from Asobo ?, could you provide a screenshot ?
Do you have any addon that could cause a conflict ?
It’s the default heading indicator on the Asobo stock C172.
Wondering if the glass G1000 panel uses an automatic reset for the heading indicator to match the compass heading to compensate for gyro drift.
So, if user sets the heading indicator to a different setting than the compass (or gyro drift causes the heading indicator to be different than the compass), it automatically resets itself??
I am not an avionic expert but I assume there is no automatic reset function for glass cockpit heading indicator since they use satellite data, they are always pointing to the correct heading.
Could you try with your keyboard set to “Default”, you may have a binding conflict there.
Why not to use the Heading bug instead of turning the indicator’s card. The indicator’s card must always show you the compass direction. If your gyro is drifting, then you rotate the card if you do not have a button to autocorrect its heading to compass heading.
I am trying to recreate the “legacy” C172 I used to fly before the days of a glass cockpit. As the gyro drifted (or if you wanted to change the heading indicator’s direction), you would spin the dial in either direction to increase or decrease the heading indicator.
It seems that doing that with a glass cockpit only reverts the heading to the current compass direction. Is that accurate??
Are you using the C172 G1000 or the C172 Steam Gauge that comes in the Deluxe version ?
Could you post o screenshot of the knob you are turning that changes the heading indicator?
The G1000 has three GMU44 flux gates/magnetometers that read the Earth’s magnetic field to provide heading information. These units are located in several places in the aircraft and are tied into the GDC74 attitude and heading reference (AHRS) system. The AHRS uses internal MEMS gyros and linear accelerometers to detect changes in aircraft attitude and orientation. The AHRS also pulls in data from the air data computer (ADC), which gets its info from the pitot/static system and the OAT probe to display altitude and speed info. All of this together is called the ADAHRS and it is integrated with GPS as well for position and other reference.
You can’t manually calibrate the G1000’s integral heading indicator/HSI to the magnetic compass heading like you would with a traditional gyro. If the magnetometers do fail, it will revert to using GPS for heading (course) info.
The only thing the HDG knob should change is the heading bug (pushing it aligns it with the current heading), but it will not change the current indicated heading.
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Charlie - Thank you for the response. I used to fly the C172 with analog instruments, and had the gyro drift to contend with and manually reset to the magnetic compass. Your explanation makes perfect sense - and explains what I am seeing with the G1000.
I have built a cockpit and instrument panel to simulate what I used to fly for real. My homebuilt cockpit uses an analog instrument setup that accesses the data from the G1000 instruments. Obviously, my analog directional gyro heading indicator is taking its data from the G1000 and thus, I cannot see any drift or manually reset my gyro.
Question: other than upgrading to the deluxe version (or 2024), is there a C172 model out there that is more of a “legacy” plane with analog instruments?? I found a free one, but it doesn’t include a transponder or ADF.
I really would like to find a C172 model with the full assortment of analog instruments, including the DG as well as transponder and ADF.
Pete
How about the Cessna 150/152?
Also, what software do you use to send data to your home built instruments? That setup sounds really cool!
Thanks Demented - I will look at these.
Pete
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Charlie - I want to stay with the C172 or C182. Those are the ones I flew way back when. 
I use ‘Air Manager’ to read the instrument data from MSFS or X-Plane and display the instruments from Air Manager on an ultra-wide monitor.
I can send a couple of photos if anyone wants to see what I did - nothing spectacular, but it works for me.
Pete
For PC there is this model, for Xbox I do not know is there a separate one from Delux versions, but for MSFS2024 there is a possibility to purchase planes individually.
Thanks Common - I had already found the Reims C172 and tried it. Either it doesn’t have a transponder and ADF or I can’t figure out how to access them.
Any idea if it has both transponder and ADF??
Pete
Yeah, I had monkeyed around with the Reims a while back. I can get the transponder to work, but I can’t get the ADF to respond to any input. Nothing on my instrument panel works with it (I have programmed buttons to change 100s, 10s and 1s as well as on/off). Also, using the mouse doesn’t do anything.
What’s weird is that “ADF” has no 100s, 10s and 1s button settings. They are only for ADF1 and ADF2. But, there is an ADF on/off buttonsetting.
Any ideas??
Pete
P.S. I think the problem is that the Reim’s ADF uses a “standby” frequency to tune. Then, you toggle between the standby and current. I don’t see how to do that with the control options in MSFS listed for ADF.
Any ideas??
Common - I got ADF to work. “Standby” is used for ADF1. So, if you tune ADF1 for 100s, 10s and 1s those values are used to set “Standby”. Then, swapping ADF1 and “Standby” seeds the ADF with the correct values.
Thanks for your help.
Pete
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