T-6A Aerodynamics 101 Flashcards
Vector Definition
A quantity that represents magnitude and direction. It is commonly used to represent displacement, velocity, acceleration, and force.
Velocity Definition
Is the speed and direction of a body’s motion (the rate and change of position)
Acceleration Definition
Is the rate of a body’s change of velocity
Force definition
Is a push or pull exerted on a body
Mass (m) definition
The quantity of molecular material that comprised an object
Volume (v) defenition
The amount of space occupied by an object
Density (p) definition
The mass per unit of volume
Work (w) Definition
When a force acts upon a body and moves it
Power (P) definition
The rate of doing work or work done per unit of time
Horsepower definition
A unit of measurement used to express the amount of power being produced
Weight (W) Definition
Is the force with which a mass is attracted toward the center of the Earth by gravity
Force (F) definition
Mass x Acceleration
Moment Definition
What is created when a force is applied at some distance from an axis or fulcrum, producing rotation about that point. (moment=force x distance(d))
Energy Definition
A scalar measure of a body’s capacity to do work
What are the 2 forms of energy
Potential Energy (P.E.) Kinetic Energy (K.E.)
Total Energy (T.E.) Definition
The sum of potential energy and kinetic energy
Potential Energy definition
The ability of a body to do work because of its position or state of being
Kinetic energy definition
The ability of a body to do work because it is in motion
Define Inertia
The tendency for a body to remain at rest or in motion
Equilibrium definition
The lack of acceleration in any direction
Newtons law of Equilibrium
A body at rest tends to remain at rest, and a body in motion tends to remain in motion…unless acted upon by some unbalanced force
Ambient Static Pressure
A measurement of the weight of an air column over a specific area
Air Density
The total mass of air particles for a given volume
Temperature
Measure of the average kinetic energy of the air particles.
Temp decreases 2
Temperature
The measure of the average kinetic energy of the air particles.
Temp decreases 2ºC for every 1000’ (Standard Lapse Rate)
Static Pressure (Ps)
The force that molecules of air exert on each other my their random movement.
Dynamic Pressure (Pd)
A measure of impact pressure of a large group of air molecules moving together
Total Pressure (Pt)
The sum of static and dynamic pressure
True Altitude Definition
The actual height above mean sea level
Pressure Altitude
A height measured above a standard datum plane
Density Altitude (DA)
Pressure altitude corrected for temp. deviations from the ‘standard atmosphere’
True Airspeed (TAS)
The actual airspeed at which an aircraft moves through an air mass
Groundspeed (GS)
The speed at which an aircraft moves relative to the ground. True airspeed corrected for winds
Indicated Airspeed (IAS)
The speed that the pilot reads off the indicator
What happens to TAS when IAS remains at a constant
TAS increases approx. 3 knots for each 1,000’ increase in altitude
Calibrated Airspeed (CAS)
Indicated airspeed corrected for either indicator error or for minor sensing errors caused by the location of the pitot-static system on an airplane
Equivalent Airspeed (EAS)
Calibrated airspeed corrected for errors caused by compressibility effects
What is an airfoil
A streamlined shape designed to produce lift as it moves through the air
Mean Camber Line (MCL)
The line drawn from the leading edge to the trailing edge, halfway between the upper and lower half of the airfoil
Chordline
An infinitely long straight line drawn through the leading and trailing edges of the airfoil
Root Chord vs. Tip Chord vs. Average Chord
The root chord is at the wing root, and the tip chord is the chord measured at the wingtip. Average chord is the average of all chords from the wing root to the wingtip.
Spanwise flow
The air that travels along the span of the wing, parallel to the leading edge, from root to tip (Opposite of chordwise flow)
Pitch attitude
Defined as the angle between the longitudinal axis of an airplane and the horizon
What is a flightpath
The apparent movement through an airmass
Relative wind Definition
The apparent motion of the air with respect to the motion of the aircraft.
Angle of incidence
The angle between the airplane’s longitudinal axis and the chordline of its wing
Center of gravity
The point at which all weight is considered to be concentrated
Aerodynamic center
The center of lift
