NIFE Aero Latest Version with Certified Solutions

NIFE Aero Latest Version with Certified Solutions Define Vector A quantity that expresses both magnitude and direction. A vector quantity is represented by an arrow that displays direction and has a length proportional to magnitude Moment Force applied at some distance from an axis or fulcrum F x d (Distance: from the point of rotation that is perpendicular to force, "moment arm") Equilibrium Flight When the sum of all FORCE and all MOMENTS around the COG are equal to zero When are the four forces that act on an airplane in equilibrium? Thrust, drag, lift, weight Atmospheric static pressure Weight of a column of air over a given area Air Density The total mass of air particles per unit of volume What three things happen as air becomes less dense for airplane: Reduces power Reduces thrust Reduces lift With altitude increase, what happens to air temp Decreases linearly at 2 C (3.57 F) per 1000ft, until 36000ft. What is this rate of temp change called Average Lapse Rate Humidity Amount of water vapor in the air Humidity and Density relationship Inverse General Gas Law P = pRT Steady airflow Exists if at every point in the airflow static pressure, density, temperature, and velocity remain constant over time (may vary from one point to another, but at any given point, it is constant) Same path is followed Steamline the path that air particles follow in steady airflow Streamtube (2 things) collection of many adjacent streamlines. closed system Continuity Equation A1V1 = A2V2 Bernoulli's Principle Total energy of a fluid can be separated into potential energy (static pressure) and kinetic energy (dynamic pressure) Total Pressure (Pt) = Ps + q Talk about Bernoullis Prin in a closed system Total pressure is constant, therefore an increase in static pressure = decrease in dynamic pressure PT = PT = Ps + (1/2)pV^2 Indicated Airspeed Actual instrument indication of the dynamic pressure the airplane is exposed to during flight Calibrated Airspeed When indicated airspeed is corrected for instrument error Equivalent Airspeed True airspeed at sea level on a standard day that produces the same dynamic pressure as the actual flight condition