It gives good performance with a stall angle
between 10 to 15 degrees compared to NACA0012.
Most of these researches only focus on linear interval of incidence angle, that is, within stall angle. To give an insight into flight dynamic characteristics near the flight boundary especially for poststall region, nonlinear icing effect model for a wide range of angle of attack should be established.
Most of the current icing effect model can only get the decreased lift coefficient and cannot reflect the change of stall angle. This is due to the essence of these models; they only count the percentage of alteration for each derivative.
(1) The agreement between computed and experimental values of lift coefficient is very good up to stall angle
. Near and above stall angle
, the lift coefficient continues to increase.
* Maximum lift coefficient and stall angle of attack increases are the result of an overlap effect between opposite effects: trailing edge thickness increases both, but airfoil thickness and lower camber decrease them both.
The improvement in the lift coefficient of blunt trailing edge airfoils was studied, as they have a larger maximum lift coefficient and a larger stall angle of attack than unmodified airfoils.
"So here they are," he adds, "with a job involving ground reference maneuvers and they haven't had any ground reference training." What the Kenyan pilots had no concept of is the relationship of bank angle and load factor to stall angle of attack.
During this excursion, the angle of attack reached 15 degrees and, a second later, exceeded the 17-degree stall angle of attack.
The stall angle
of attack decreases, which translates to a higher stall speed, the exact value of which depends on the wing and the amount and type of ice.
The company does not call it an angle of attack instrument, but does state that the LRI identifies the absolute stall angle
for any aircraft.