Wing Flap Settings; Crosswind Takeoff - Cessna 172S NAV III Pilot Operating Handbook

CESSNA
MODEL 172S NAV III
TAKEOFF
(Continued)
WING FLAP SETTINGS
SECTION 4
NORMAL PROCEDURES
Normal takeoffs use wing flaps UP - 10°. Using 10° wing flaps
reduces the ground roll and total distance over an obstacle by
approximately 10 percent. Flap deflections greater than 10° are
not approved for takeoff. If 10° wing flaps are used for takeoff,
the flaps should stay at 10° until all obstacles are cleared and a
safe flap retraction speed of 60 KIAS is reached. For a short field,
10° wing flaps and an obstacle clearance speed of 56 KIAS should
be used.
Soft or rough field takeoffs are performed with 10° flaps by lifting
the airplane off the ground as soon as practical in a slightly tail low
attitude. "no obstacles are ahead, the airplane should be leveled
off immediately to accelerate to a higher climb speed. When
departing a soft field with an aft C.G. loading, the elevator trim
control should be adjusted towards the nose down direction to give
comfortable control wheel forces during the initial climb.
CROSSWIND TAKEOFF
Takeoffs into strong crosswind conditions normally are performed
with the minimum flap setting necessary for the field length to
minimize the drift angle immediately after takeoff. With the ailerons
partially deflected into the wind, the airplane is accelerated to a
speed slightly higher than normal, then the elevator control is used
to quickly, but carefully, lift the airplane off the ground and to
prevent possible settling back to the runway while drifting. When
clear of the ground, make a coordinated turn into the wind to correct
for drift.
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172SPHAUS-03
U.S. 4-31