T-45C TS & ADV CO-09; IUT CO-05
Velocity Vector
LESSON NOTES
To avoid potential misunderstandings, it is important
that students clearly comprehend the distinction
between AOA in degrees and AOA in units. Both are
used in T-45C NATOPS general discussions and in
conjunction with performance data computations.
1.
HUD digital AOA values are displayed in
units
2.
HUD graphic depiction of the velocity vector
is in degrees on the pitch ladder
3.
AOA degrees and units are not equal
values
4.
T-45C difference between velocity vector
digital (units) and HUD velocity vector
(degrees) is a constant factor, as per the
following formula
True AOA(UNITS) = True AOA(DEGREES) + 8.93
Sg 2, fr 3
1.025
LESSON NOTES
When zero is entered in the above formula for True
AOA DEGREES AND UNITS
AOA (DEGREES), the HUD (UNITS) figure computes to be +8.7
. At 30 True AOA (DEGREES) the result is +38.0 (UNITS).
(UNITS)
So, for practical purposes it can be said that the digital
AOA in units is always approximately +8.0-8.7 units
more than true AOA in degrees.
(10-99) Original
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