FSX fixed vertical FOV (FOVy) value.

I am working on a FSX XML HUD gauge for my personal use. I use FSXa, zoom is set to 1 and WideViewAspect=True. One of the features of the HUD is a conformal heading tape that runs along and is connected to the zero pitch horizon line which is already conformal with the sim horizon at sea level. It is my understanding that in FSX with WideViewAspect=True the FOVy is a fixed value. For me to compute the x axis pixel shift per deg of the heading tape accurately I need to know what the fixed vertical field of view value is, exactly. I can't find any Microsoft documentation that list default FOVy under these conditions. I have searched around the web and found it listed as "about 34 deg", "about 35 deg" and ".6 rad" (which works out to 34.3775 Deg). Someone at this site did a set of 3 excellent videos a few years back about FSX  and WideViewAspect=yes. These videos have come to be considered the goto std explaining how this feature works in FSX and realistic setup of monitor systems. In the first video it is said that the fixed vertical FOV is "about 35 deg" Would you happen to know what this value is exactly and is it based on .6 Radians ?
Many thanks in advance for your assistance.

Joel