aerodynamic

Streamlines is?

• resultant of all aerodynamic forces, perpendicular to the chord

• imaginary line showing direction of velocity

• that part which meets airlow first

• direction of flow with respect to wing

Airfoil:

• is a cross sectional shape of the wing designed to create fore

• imaginary line joining the leading and trailing edge

• plan view of the wing

• all of them

Upstream

• flow after the trailing edge

• flow before the trailing edge

• flow before the leading edge

• flow after the leading edge

Downstream:

• flow before the trailing edge

• flow after the leading edge

• flow after the trailing edge

• flow before the leading edge

Leading edge:

• the part which meets the airflow first

• the part which doesn't meets the airflow

trailing edge

• upper flow re-joins with lower flow

• upper flow

  un-joining with the lower flow

Laminar flow

• unifomflow

• smooth parallel

• least amount of drag

• all of them

turbulent flow

• - mixing layer

  - high drag

• resistance to flow

• unaffected flow

• uniform flow

viscosity

• fluid resistance to flow

• non-viscous

• unaffected flow

state of equilibrium

• weight and drag is equal

• drag and lift is equal

• thrust and weight is equal

• lift and weight is equal