Chris, I tried to get as sharp an image as possible, but there isn't
much to see. From some on-line searching, I gather that sailplane
pilots like to have variometers that show both the vertical speed of a
rising thermal column and the vertical speed of the aircraft. Maybe that
information is provided by these instruments, but the details have to be
in the head of the pilot.
Neither of these is a g-meter. I think the markings give vertical speed
in knots.
--
Jim Nichols
Tullahoma, TN USA
--
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