[
EDIT, Jan 6, 2022] I figured I might as well include my profile, as I understand that some folk supply and obtain existing ones to try. I must stress that it applies to my setup, which is for the hat clip, and where the clip lies pretty close to the camera. I've never downloaded/installed other profiles, and so don't know this from experience. It might(?) require to place in this location:
%AppData%\NaturalPoint\TrackIR 5\Profiles
You could first try to place it here, where the supplied default profiles are located:
Program Files (x86)\NaturalPoint\TrackIR5\Profiles
https://www.mediafire.com/file/33mvzbm20q624fh/WxTech_IL-2_TrackIR_profile.7z/file
==============================================================
I thought I'd supply some thoughts on TrackIR settings, and supply what I use. Note that this software version is a couple or few years old, and appearances may have been changed. I don't tend to update unless there are meaningful improvements.
This post is inspired in good measure by the observation that a number of YouTubers are clearly using head tracking gear in their IL-2 videos but failing to take full advantage of the 6dof capability. This might result from a less than effective set of axis settings in translation.
Some terms defined:
Rotation is what you think; spinning about an axis. The three axes here are: Yaw, or left-right panning; Pitch, or up-down nodding; Roll, or head tilt to the left or right (touching ears to shoulders).
Translation is a positional change without rotation. The three axes here are: X, or sliding to the left or right; Y, or rising up or scrunching down; Z, or leaning forward or backward.
My setup is worth describing, because this has an impact on the particular axis settings I use. I'll supply suggestions later on strategies for folk who aren't so close to their monitor.
My monitor is rated as a 31.5" job, with a curved screen, and has an active diagonal dimension of 79cm (31"). My eyes are about 50cm (20") from the screen; that's pretty close by most people's standards! To obtain comfortable focus, I wear 2.5 diopter reading glasses. This has the additional benefit of enlarging the apparent screen area by about 10%, and also slightly accentuates the apparent curvature, resulting in a tad more 'wraparound' effect. Furthermore, the resulting apparent angular width of the screen is nearly 90 degrees, which is not much less that my default 105 degree FoV, meaning a near 1:1 image scaling. That's great for situational awareness.
I use the basic TrackClip, seeing no advantage with the LED-equipped TrackClipPro. Instead of wearing the clip on the brim of a ball cap (I hate caps). I've done this. Attached to the top of my headphone band (which arcs over the top of my noggin) is a piece of stiff hanger wire that proturudes straight ahead to a distance of 27cm (10.5"). The TrackClip is attached at the end, placing it something like 10cm farther forward than it would be if attached to a cap's brim.
Why so far forward, you ask? It means that when I swivel my head in rotation, there is simultaneously applied a greater degree of translational movement. This means I automatically enjoy improved peering around obstructions like canopy framing without having to lean sideways or bob up and down as much; in some more confined cockpits, not at all.
The strategy I employ in rotation is to have my gaze, to extent possible, always directed straight with respect to my eye sockets as I pan and tilt my head. That is, I do not want to have to cause my eyes to swivel in their sockets. The advantage of my close placement to the screen is that I can employ a fair degree of physical head panning due to the large apparent size of the screen in my field of vision. This aids in pointing precision.
In translation, I want to move physically to as little an extent possible, but at the same time have decent enough control over my virtual position. There's a balance to seek in meeting these conflicting requirements.
Below is a mosaic of screen shots showing my settings.
The topmost image shows the settings for the basic Speed and Smoothness. I prefer to set Speed at unity, and adjust the axes as necessary. The Smooth value of 20 is for me a good compromise between crispness of response and suppression of jitter (especially when zoomed in).
The next row are the three rotational axes. I've made Yaw and Pitch identical, because I desire the same movement scaling when panning the view. The V-shaped profile makes for better pointing precision when looking straight ahead, the response becoming more rapid with incresing angular offset. Roll has been made flat in response, for a uniform, linear action. (But I generally disable this axis anyway, finding it superfluous, if not annoying.)
The bottom row covers the three translational axes. As I did for panning, I've made the X and Y axes identical. For the Z axis (leaning forward/backward) I've doubled the sensitivity, so that I don't have to make too large a change in my distance from the screen.
For those who don't crowd in so close to their screen as I do.
When you monitor covers a smaller apparent angular size on your retina, as when sitting far away, and/or using a small screen, the Yaw and Pitch sensitivity could be increased. That's because you don't want to have to swivel your head as far as I do, or else you'll have to swivel your eyes in their sockets a bit. This can be achieved simply by hitting the green up arrow, which will globally move the curve up. This will result in a larger virtual head swiveling for given physical head turning.
And for translation, again, from the effectively farther position of your head from the screen, you may need to boost sensitivity by moving the curves upward.