Fixed-Wing Aerodynamics Flashcards
In fluid, total pressure is the sum of?
Static and dynamic pressure
Factors affecting the lift of a wing? (4)
- Velocity of flow
- Geometry of airfoil
- AOA of airfoil
- Wing area
Equivalent airspeed correct for density altitude becomes?
True Airspeed
Calibrated airspeed correct for compressibility effects becomes?
Equivalent Airspeed
The Bernoulli’s Principle states that when the velocity of the flow increases, the pressure?
Decreases
What are carnards primarily used for?
Pitch control
The continuity principle implies that for a given flow through a tube, when the cross-sectional area of the tube increases, the velocity of the flow:?
Decreases
A Mach wave is formed when an object is travelling?
More than Mach 1
Lift is generated because?
The velocity of flow of air is faster on the upper surface of the airfoil than the lower surface
What are the fundamental physical principles that equations of aerodynamics are based on?
- Conservation of Mass
- Conservation of Momentum
- Conservation of Energy
The basis of airspeed measure is the difference between?
Total Pressure and Static Pressure
What measures airspeed?
Pitot-static tube
As Altitude increase?
- Density Decrease
- Pressure Decrease
- Temperature Decrease, Constant, then Increase
The fighter engine is often contained within?
The fuselage
The more stable an aircraft is, the more/less agile it is?
Less
Which provides yaw stability?
Vertical Tail
Induced drag is due to?
Component of lift in the opposite direction of motion
Skin friction drag is due to?
Air flowing over the rough surface of aircraft
Form drag is due to?
Frontal area of object
What is not a type of drag?
Dynamic drag
Which does not affect lift of an airfoil?
Weight of aircraft
The chord is?
An imaginary straight line connecting the trailing and leading edges
The mean camber line is?
The locus of points halfway between upper and lower surfaces of an airfoil
For Mach less than 0.3, compressibility of air need/need not be taken into account?
No need
Which is not a lift increasing device?
Vertical tail
Main surface to effect:
- Yaw control - Rudders
- Roll control- Ailerons
- Pitch control- Elevators
