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T-45A/C TS, E2-C2, ADV & IUT Aero-06/07
NATOPS Performance Charts / Charts and Exam Review
E.
Compressibility Correction to Calibrated Airspeed
Sg 3, fr 11
Compressibility
Correction to
1.
Indicates subsonic air is compressible at higher
Calibrated Airspeed
speeds
2.
CAS and TAS gain over those computed in charts
3.
At the extreme limits of The T-45’s envelope, 550
KCAS and 40,000’, the compressibility correction
would be 75 KCAS
4.
Under most circumstances, it will be less than half of
compressibility correction at 550 KCAS
Sg 3, fr 12
Climb Speed Schedule
F.
Climb Speed Schedule
1.
Determine climb speed for combination of drag
index and pressure altitudes
2.
Simplified normal climb speed schedule,
independent of weight, in constant indicated
airspeed or Mach number
G.
Time, Fuel, and Distance to Climb
Sg 3, fr 13
Time to Climb
1.
Charts used to determine time, fuel, or distance
required to climb to selected altitude at MRT and
using Climb Speed Schedule
2.
All three charts presented in similar manner
3.
Time to climb computation
a.
Enter chart with initial gross weight
Overlay 1
b.
Project horizontally from initial gross weight to
Overlay 2
desired pressure altitude reference line
Overlay 3
c.
From intersection of initial gross weight and
pressure altitude reference line project vertically
Overlay 4
down to drag index reference line
(9-99) Original
Page 6-8


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