TM 1-1520-240-10
7A-11-1
SECTION XI. AIRSPEED CALIBRATION
7A-11-1. Description.
The airspeed calibration chart, figure 7A-11-1, defines
the relationship between indicated (IAS), and calibrated
airspeed (CAS) for level flight, climb and autorotation.
7A-11-2. Use of Chart.
The primary use of the chart is illustrated by the example.
To determine calibrated airspeed, it is necessary to know
IAS and flight regime. Enter chart at indicated airspeed,
move right to appropriate flight regime, move down and
read calibrated airspeed.
7A-11-3. Conditions.
Presented airspeed calibration charts are for CH-47D
helicopters with T55-GA-714A engines.
