Please read the
sequence below while the animation loads.
- The airplane is in straight and
level flight, and the pilot reduces forward speed.
- The pilot increases back pressure
on the yoke, which increases the angle of attack (from green to yellow
on the model). The increase in angle of attack compensates for the reduced
airspeed, so lift is constant and the airplane continues to maintain
- The pilot continues to increase
back pressure until a critical angle of attack occurs (red on the model).
There is now insufficient lift to sustain flight, and the wing "stalls".
- The airplane continues
forward but starts to descend because of gravity pull and lack of lift.
This is referenced by the downward direction of the instantaneous flight
path. The pilot incorrectly holds back pressure as the nose drops through
the horizon. This is illustrated on the model by the angle of attack
remaining in the red area. Proper recovery requires that the angle of attack be
- Note that the pilot is looking
forward as the aircraft is descending downward, yielding a moment of
confusion for the pilot.
- With proper training, an astute
pilot recognizes that an excessive angle of attack creates a stall,
and then corrects the situation by releasing back pressure on the yoke.
The nose will then lower, and the airplane will regain flying speed.
The angle of attack returns to green on the model. Ergo; our slogan
at AlphaTrainer is, "From Red to Green is our Dream".
most actual stalls, the application of more power is an integral part
of the stall recovery. Usually, when greater power is applied, less
altitude is lost.
- The wing and the pilot's view again
align with the instantaneous flight path, and the aircraft accelerates
in a shallow dive. The pilot then pulls out of the dive and the airplane
returns to normal flight.
Note that there were three
basic elements of flight, or lack of flight, occurring. These elements
are the instantaneous flight path, the angle of attack, and pilot's perceived
attitude. The angle of attack and instantaneous flight path may be elusive
from what pilot actually views. Only the patented AlphaTrainer offers
this dramatic visual revelation.