Takeoff Considerations

APPENDIX H

INTERMEDIATE FLIGHT PREPARATION WORKBOOK

ZFW CG

Zero Fuel Weight Center of Gravity

ZFW MOM

Zero Fuel Weight Moment

ZF% MAC

Zero Fuel Percent of MAC

Engine Fan Speed - Measured in percent

%N1

%N2

Engine Turbine RPM - Measured in percent

%RPM

Revolutions per Minute - Measured in percent

H101. TAKEOFF CONSIDERATIONS

Selection of ACM (On or Off)

ACM is normally selected ON for takeoff. If the takeoff can not be accomplished at the desired

takeoff conditions with ACM ON, it is sometimes possible to gain sufficient performance

capability with ACM OFF to accomplish the takeoff and climbout.

NOTE

Reduced %N1 takeoff is approved only with ACM ON and ENGINE

ANTI-ICE OFF.

Wind and Gradient

Accounting for wind in planning the takeoff or landing requires the wind direction and speed be

known. After obtaining the wind direction and speed, determine the headwind (tailwind) and

crosswind components from Takeoff and Landing Crosswind Chart in the PCL. Application of

wind components to takeoff and climb data is discussed on the next page.

Headwind

Benefits of headwinds are normally accepted as an increased margin of safety and not accounted

for in takeoff planning. However, if mission requirements dictate, use 50% of the steady

headwind component when determining CFL, VCEF, VR, VB, and takeoff distances. Do not apply

headwind components for terrain clearance.

H102. CLIMB CHARACTERIZATIONS

Climb Speed

The recommended climb speeds for the 2-engine rate climb and the 1-engine inoperative climb

are close approximations to the speeds for best rate of climb. The climb speed for 2-engine

operation is 220 KIAS from MSL to 30,600 feet, and M 0.60 at altitudes above 30,600 feet.

H-4 T-1A PERFORMANCE MANUAL EXTRACTS