Drag Flashcards
Parasite Drag is made up of:
Skin friction drag.
Form (Pressure) drag.
Interference drag.
Induced Drag
Spanwise airflow generates wing tip vortices.
Total Drag
Total drag is the sum of Parasite drag and Induced drag.
At low IAS ____ drag is dominant.
At high IAS ____ drag dominates.
At low IAS Induced drag is dominant.
At high IAS Parasite drag dominates.
At a constant IAS, ____ has no effect on Total drag, but TAS will increase as density decreases
with increasing ___.
At a constant IAS, ALTITUDE has no effect on Total drag, but TAS will increase as density decreases
with increasing ALTITUDE.
By changing the angle of attack of a wing, the pilot can control the aeroplane’s:
lift, airspeed, and drag.
What is the relationship between induced and parasite drag when the gross weight is increased?
Induced drag increases more than parasite drag.
In theory, if the airspeed of an aeroplane is doubled while in level flight, parasite
drag will become:
four times greater.
As airspeed decreases in level flight below that speed for maximum lift/drag ratio, total drag of an aeroplane:
increases because of increased induced drag.
At the airspeed represented by point B, in steady flight, the
aeroplane will:
have its maximum L/D ratio.
On a wing, the force of lift acts perpendicular to, and the force of drag acts parallel to the:
flight path.
That portion of the aircraft’s total drag created by the production of lift is called:
induced drag, and is greatly affected by changes in airspeed.
The best L/D ratio of an aircraft occurs when parasite drag is:
equal to induced drag.
At a given True Airspeed, what effect will increased air density have on the lift and drag of an aircraft?
Lift and drag will increase
The best L/D ratio of an aircraft in a given configuration is a value that:
remains constant regardless of Indicated Airspeed changes.
