CPL PoF Drag Revision 1

Drag is:

• A component of the TR parallel to the RAF opposing motion

• A component of the TR acting 90° to the RAF

• Acts through the CoG

• A component of the TR parallel to the RAF acting in the direction of flight

Total drag is made up of:

• Zero lift drag - Lift dependent drag

• Zero lift drag - Total drag

• Lift dependent drag + Zero lift drag

• Zero lift drag / Lift Dependent drag

Lift dependent drag is also known as

• Parasite drag

• Upwash

• Induced drag

• Form Drag

How does downwash effect the generation of lift:

• Downwash increases lift by increasing the effective AoA

• Downwash decreases lift by decreasing the effective AoA

• Downwash increases lift by decreasing the effective AoA

• Downwash decreases lift by increasing the effective AoA

Select all the options that will increase induced drag

• Low Aspect ratio

• Increased airspeed

• Increased weight

• Increased AoA

The layer of air extending from the surface to the point where no dragging effect is discernible is known as the?

• RAF

• Turbulent Flow

• AoA

• The boundary layer

The transition point is:

• The point where the air within the boundary layer stops accelerating and becomes turbulent

• The point where the air within the boundary layer become turbulent and starts acclerating

• The point when the airflow detaches from the wings surface and becomes turbulent

• The point with the airflow within the boundary layer becomes laminar and detaches from the wings surface

Induced drag is:

• Proportional to V²

• Proportional to V

• Inversely proportional to V²

• Inversely proportional to V

Washout:

• Is the reduction of the angle of incidence at the wingroot. This reduces induced drag

• Is the reduction of the angle of incidence at the wingtip. This increases induced drag.

• Is the reduction of the angle of incidence at the wingroot. This increases induced drag

• Is the reduction of the angle of incidence at the wingtip. This reduces induced drag

At the transition point:

• The static pressure starts decreasing. Causing an adverse pressure gradient

• The static pressure remains the same as before the transition point

• The static pressure starts increasing. Causing an adverse pressure gradient

• Both dynamic and static pressure increase