AE101 Basic Theory Flashcards
______ is done when a force acts upon a body and moves it. Equal to force (F) times distance of displacement (s)
Work (W), W = F x s
____ is the rate of doing work or work done per unit of time (t), it can also be measured as Force (F) times Velocity (s/t).
Power (P), P = W/t or P = F (s/t)
____ is a unit of measurement used to express the amount of power being produced.
Horsepower, HP = P/550
___ is what is created when a force is applied at some distance from an axis or fulcrum, producing rotation about that point.
Moment (M), Moment = Force x Distance (D)
The distance from the axis or fulcrum to the point of force is called the ___ ___.
Moment Arm
A body at rest tends to remain at rest and a body in motion tends to remain in motion in a straight line at a constant velocity unless acted upon by some unbalanced force.
Newton’s 1st Law of Motion, “Law of Equilibrium”
An unbalanced force acting upon a body produces an acceleration in the direction of the force that is directly proportional to the force and inversely proportional to the mass of the body.
Newton’s 2nd Law of Motion, “Law of Acceleration”
For every action there is an opposite and equal reaction.
Newton’s 3rd Law of Motion, “Law of Interation”
The tendency for a body to remain at rest or in motion is called ___.
Inertia
What is the general gas law?
P = ρRT (Pressure = density x temperature x universal gas constant)
What is the subsonic mass flow equation?
A1V1 = A2V2 (A = area, V = volume)
According to Bernoulli’s equation, Pt = Ps + q (dynamic pressure), if dynamic pressure increases at a point then ___ ___ must decrease at the same point.
static pressure
___ is the actual height above mean sea lever.
true altitude
___ is a height measured above a standard datum plane (the actual elevation at which the barometric pressure is equal to 29.92 in-Hg). The datum plane is at sea level ona standard day.
pressure altitude
On a standard day what two altitude measurements are equal?
pressure altitude and true altitude
___ is pressure altitude corrected for temperature deviations from the standard atmosphere.
density altitude
___ is the actual speed at which an aircraft moves through an air mass.
Ture Airspeed (TAS)
___ is the speed at which an aircraft moves relative to the ground. It is true airspeed corrected for winds.
Groundspeed (GS)
___ is the speed that the pilot reads off the airspeed indicator. The airspeed indicator takes the total pressure of the air through the pitot tube and subtracts the static pressure from the static port to obtain dynamic pressure.
Indicated Airspeed (IAS)
At a constant IAS, ___ will increase approximately ___ knots for each thousand foot increase in altitude.
IAS, 3
___ is indicated airspeed corrected for either indicator error of for minor sensing errors caused by the location of the pitot-static system.
Calibrated Airspeed (CAS)
___ is calibrated airspeed corrected for errors caused by compressibillity effects (ex: air molecules “bunch up” and can’t flow freely through the pitot tube at high airspeeds).
Equivalent airspeed (EAS)
___ ___ ___ is a line drawn from the leading edge to the trailing edge, halfway between the upper and lower surface of the airfoil.
Mean Camber Line (MCL)
___ is an infinitely long straight line drawn through the leading and trailing edges of the airfoil.
Chordline
___ is the segment fo the chordline measured from the leading edge to the trailing edge.
Chord
___ ___ is the chord at the wing root, and ___ ___ is the chord measured at the wing tip.
root chord, tip chord
___ ___ is the average of all chords from the wing root to the wing tip.
average chord
___ is the curvature of the mean camber line of an airfoil. It is measured by finding the max distance between the mean camber line and the chord line.
Camber
A ___ ___ has zero camber, a ___ ___ ___ has the MCL above the chord (produces lift at zero angle of attach), and a ___ ___ ___ has the MCL below the chord (race car)
symmetric airfoil, positively cambered airfoil, negatively cambered airfoil
___ ___ is airflow that travels along the span of the wing, parallel to the leading edge, root to tip, doesn’t create lift.
spanwise flow
___ ___ is air that flows at right angles to the leading edge of the airfoil, produces lift.
chordwile flow
___ ___ is the angle between the longitudinal axis of the airplane and the horizon.
pitch attitude
The ___ ___ is the apparent movement of the plane through an air mass.
flight path
___ ___ is the apparent motion of the air with respect to the motion of the aircraft.
relative wind
___ ___ ___ is the angle between the chordline of teh airfoil and the relative wind.
Angle of Attack (AOA)
___ ___ ___ is the angle between the airplane’s longitudinal axis and the chordline of its wing.
angle of incidence
___ ___ is the angle of the upslope or downslope of the wings when viewed from head on.
dihedral angle (a downslope or negative dihedral is called anhedral)
What is the T-6 wingspan?
33 feet 5 inches
___ ___ is approximated by multiplyin the wingspan (b) by the average chord (c).
wing area (S)
___ ___ is the ratio of an aircraft’s weight to the surface area of the wings.
wing loading (WL), WL = Weight/S
___ wings provide reduced weight and increased structural stiffness compared to a rectangular wing.
tapered
___ ___ is the angle between the quarter chord line (a line 25% off the chord and not parallel to the leading edge) and a line parallel to the lateral axis.
Sweep Angle
Aspect ratio (AR) is the ratio of the ___ to the ___ ___.
wingspan (b), average chord (c)
The ___ ___ is also know as the center of lift. It is the point where all aerodynamic forces are acting. It is typically aft of the CG to provide improved stability around the lateral or pitch axis.
aerodynamic center
