Normal Takeoff - Theory |
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Below is an excerpt
from the FAA's Airplane Flying Handbook - FAA-H-8083-3B
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It should help
you understand the underlying "what, why,
and how" of this maneuver.
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If you want to
read the entire chapter:
Chapter
5: Takeoffs and Departure Climbs
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Normal Takeoff
- Defined
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Though it may
seem relatively simple, the takeoff often presents
the most hazards of any part of a flight. The
importance of thorough knowledge of procedures
and techniques coupled with proficiency in performance
cannot be overemphasized.
A normal takeoff is one in which the airplane
is headed into the wind; there are times that
a takeoff with a tail wind is necessary. Also,
the takeoff surfaces are firm and of sufficient
length to permit the airplane to gradually accelerate
to normal lift-off and climb-out speed, and
there are no obstructions along the takeoff
path.
There are two reasons for making a takeoff as
nearly into the wind as possible.
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First, since
the airplane depends on airspeed, a headwind
provides some of that airspeed even before the
airplane begins to accelerate into the wind.
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Second, a headwind
decreases the ground speed necessary to achieve
flying speed. Slower ground speeds yield shorter
ground roll distances and allow use of shorter
runways while reducing wear and stress on the
landing gear.
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Prior to Takeoff
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All run up and
pre-takeoff checklist items should be completed
before taxiing onto the runway or takeoff area.
As a minimum before every takeoff, all engine
instruments should be checked for proper and
usual indications, and all controls should be
checked for full, free, and correct movement.
In addition, the pilot must make certain that
the approach and takeoff paths are clear of
other aircraft.
When operating from a towered airport, pilots
must contact the tower operator and receive
a takeoff clearance before taxiing onto the
active runway.
It is not recommended to take off immediately
behind another aircraft, particularly large,
heavily loaded transport airplanes, because
of the wake turbulence that is generated. Plan
to minimize the chances of flying through an
aircrafts wake turbulence by avoiding
the other aircrafts flightpath or rotate
prior to the point at which the preceding aircraft
rotated.
While taxiing onto the runway, select ground
reference points that are aligned with the runway
direction to aid in maintaining directional
control and alignment with the runway center
line during the climb out. These may be runway
centerline markings, runway lighting, distant
trees, towers, buildings, or mountain peaks.
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Terms and
Definitions
Although the takeoff and climb is one continuous
maneuver, it will be divided into three separate
steps for purposes of explanation:
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Takeoff
roll (ground roll) - is the portion of the
takeoff procedure during which the airplane
is accelerated from a standstill to an airspeed
that provides sufficient lift for it to become
airborne.
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Lift-off
- is when the wings are lifting the weight of
the airplane off the surface. In most airplanes,
this is the result of the pilot rotating the
nose up to increase the angle of attack (AOA).
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The
initial climb - begins when the airplane
leaves the surface and a climb pitch attitude
has been established. Normally, it is considered
complete when the airplane has reached a safe
maneuvering altitude or an en route climb has
been established.
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