Advanced Aerodynamics

What are the main factors effecting co-efficient of lift?

• Weather conditions
• Angle of attack, Reynolds number, wing shape in section and plan form, condition of the wing surface, LSS

• Wing material composition
• Pilot experience

As subsonic air flows through a convergent duct what happens to velocity, pressure, temperature and air density

• Velocity increases, pressure decreases, temperature decreases, and air density decreases.
• Velocity decreases, pressure increases, temperature increases, and air density increases.
• Velocity remains constant, pressure decreases, temperature increases, and air density remains constant.
• Velocity increases, pressure remains constant, temperature decreases, and air density increases.

As subsonic air flows through a divergent duct what happens to velocity, pressure, temperature and air density

• Velocity increases, pressure decreases, temperature decreases, and air density increases.
• Velocity remains constant, pressure decreases, temperature increases, and air density remains constant.
• Velocity decreases, pressure remains constant, temperature decreases, and air density increases.
• Velocity decreases, pressure increases, temperature increases, and air density decreases.

As supersonic air flows through a convergent duct what happens to velocity, pressure, temperature and air density

• Velocity decreases, pressure increases, temperature increases, and air density increases.
• Velocity increases, pressure remains constant, temperature decreases, and air density increases.
• Velocity remains constant, pressure decreases, temperature increases, and air density remains constant.
• Velocity increases, pressure decreases, temperature decreases, and air density decreases.

As supersonic air flows through a divergent duct what happens to velocity, pressure, temperature and air density

• Velocity remains constant, pressure decreases, temperature increases, and air density remains constant.
• Velocity increases, pressure decreases, temperature decreases, and air density decreases.
• Velocity decreases, pressure increases, temperature increases, and air density increases.
• Velocity increases, pressure remains constant, temperature decreases, and air density increases.

what is the definition of transonic flow?

• Transonic flow occurs only at subsonic speeds below Mach 0.8.
• Transonic flow is the flow of fluid at supersonic speeds above Mach 1.2.
• Transonic flow refers to the flow of fluid in a vacuum with no speed limit.
• Airflow reaches or exceeds the speed of sound. It has a mix of subsonic and supersonic flow. Tends to be unpredictable and changeable

What is the definition of the speed of sound?

• The speed of sound is the speed at which light travels in a vacuum.
• The speed of sound is the rate at which objects fall to the ground.
• The speed of sound is the maximum velocity of a moving vehicle.
• The speed of sound through the air is the speed at which a pressure wave propagates

What is the only factor that affects the speed of sound through the air?

• Air pressure
• Temperature
• Altitude
• Humidity

as air temperature increases, what happens to the speed of sound?

• Increases

• Decreases

The speed of sound decreases with an ______ in altitude

• Increase

• Decrease