SECTION XI. AIRSPEED CALIBRATION
The airspeed calibration chart, figure 7-11-1, defines the
relationship between indicated (IAS) and calibrated air-
speed (CAS) for level flight, climb, and autorotation.
7-11-2. Use of Chart.
The primary use of the chart is illustrated by 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.
Presented airspeed calibration charts are for CH-47D
helicopters with T55-L-712 engines.