I guess it is based on who said it. When JFK called
himself a jelly donut, we all smiled. When a China
man says he "velly goodly" we all smile. When a black
man describes his friend as a "good nig" we just
let it slide. But, let a white, Christian American
use some slang, and all hell breaks loose.
Well ... the one in the link looks very much like one which I
have, and one of the two in the A7-A simulator which I helped build. It
is closer to 2-1/2" as a full ball, though only about 2" visible through
the front window. I also have one at 4" which is closer to the one
which I described before. The flight simulator (and presumably the
actual aircraft) had in the center of the instrument panel the larger
one which included the compass around the equator, (thus three axis),
and the smaller one was just capable dive and bank indication, and it
was mounted in the upper right area of the instrument panel. And based
on the capabilities of the instructor's panel, and having been in the
pilot's seat (no co-pilot on this aircraft) when the switches were used,
it is nice to have a secondary indicator when the primary one starts
rolling on one or perhaps all three axes, depending on what synchro
feedback lines were opened. :-)
I agree that a full 7" one is a bit large.
O.K. This stite shows a slightly different version of the A7-A,
the "A-7 1 7" apparently.
with the larger ADI (Attitude Director Indicator) -- 16 -- top center as
before -- above the HIS (Horizontal Situation Indicator) - 8 -- and the
secondary one (Standby attitude indicator)
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