I can not find the article about the HUD and do not remember what site it was one. What I would like to know is the column on left of the speed. (left of center).

HUD
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Which HUD are you referring to? The one built into the MB339, F18 or F15 or the overlay of the sim?
The overlay of the sim has the airspeed on the left and to the left of that, at the most outer edge, its the throttle input in percent.
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I was outside of C172 at the time looking from the tail to nose.
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While we're looking at that area, what does the "M.O. #" mean below the speed column on the Info Display? Thanks.