NIFE-AERO ELO's, Questions, &
Equations
BONUS - How IAS changes with an increase in velocity at constant altitude - ANS - Increases.
Don't other think stuff like this
BONUS - What is Wind Shear - ANS - Rapid change in wind direction and/or speed. Changes
GA & IAS
DEFINE - Aerodynamic Center is ___ - ANS - Point where all aerodynamic forces are acting
and the center of lift. Located ~25% aft (1/4 Chord) at max thickness of the airfoil. (AC)
DEFINE - Air Density - ANS - Air particles within a given volume.
DEFINE - Angle of Attack - ANS - Angle formed between the relative wind and the chord line
of the airfoil (AOA, α)
DEFINE - Boundary Layer - ANS - Layer of airflow over a surface that demonstrates local
airflow retardation due to viscosity
DEFINE - Camber & Camber Types - ANS - Curvature of the MCL. Max distance between
MCL and chord. Symmetric, Positive, Negative
DEFINE - Chord - ANS - The straight line from the Leading Edge to the Trailing Edge.
DEFINE - Chordwise Airflow - ANS - Perpendicular to Leading Edge, accelerating over the
wing producing lift
DEFINE - Elastic Limit - ANS - Maximum load that may be applied to a component without
permanent deformation
DEFINE - Flight Path - ANS - Aircraft's CG movement through an air mass
DEFINE - Form Drag - ANS - Drag resulting from separation of airflow from a surface and the
'low pressure wake' that is created. Often referred to as pressure drag, profile drag, or plate
drag.
DEFINE - Friction Drag - ANS - Interaction of airflow on the surface of the aircraft
, DEFINE - Limit Load - ANS - Greatest load factor an airplane can sustain without risk of
permanent deformation. Maximum load anticipated in normal operations. 2/3 of Ultimate Load
DEFINE - Max Angle of Climb - ANS - Gaining the most altitude in a given amount of
horizontal distance
DEFINE - Max Glide Endurance - ANS - Maximum time in glide. Minimum rate of descent
occurs at bottom of power curve.
DEFINE - Max Glide Range - ANS - Maximum distance traveled in a glide. Minimum angle of
descent occurs at L/Dmax. Minimum drag.
DEFINE - Max Rate of Climb - ANS - Gaining the most altitude in a given amount of time
DEFINE - Maximum Endurance - ANS - Max time for a given amount of fuel
DEFINE - Maximum Range - ANS - Farthest distance for a given amount of fuel
DEFINE - Mean Camber Line (MCL) - ANS - Line from the Leading Edge to Trailing Edge that
is halfway between upper and lower surfaces of the airfoil
DEFINE - Moment - ANS - Created when a force is applied at some perpendicular distance
from a rotation point
DEFINE - Parasite Drag - ANS - Form Drag + Friction Drag. Not associated with lift.
Dp=1/2pV^2*f
DEFINE - Pitch Attitude - ANS - Angle between longitudinal axis and horizon
DEFINE - Relative Wind - ANS - Opposite direction of the flight path
DEFINE - Spanwise Airflow - ANS - Parallel to Leading Edge, does not create lift
DEFINE - Stall - ANS - A condition of flight in which an increase in AOA will result in a
decrease in CL
DEFINE - Steady Airflow - ANS - P, p, Temp, V stay constant at each particular point in
streamtube
DEFINE - Takeoff and landing airspeeds in terms of stall speed - ANS - 20% FoS. Vt/o =
1.2Vs
30% Fos. Vldg - 1.3Vs
Equations
BONUS - How IAS changes with an increase in velocity at constant altitude - ANS - Increases.
Don't other think stuff like this
BONUS - What is Wind Shear - ANS - Rapid change in wind direction and/or speed. Changes
GA & IAS
DEFINE - Aerodynamic Center is ___ - ANS - Point where all aerodynamic forces are acting
and the center of lift. Located ~25% aft (1/4 Chord) at max thickness of the airfoil. (AC)
DEFINE - Air Density - ANS - Air particles within a given volume.
DEFINE - Angle of Attack - ANS - Angle formed between the relative wind and the chord line
of the airfoil (AOA, α)
DEFINE - Boundary Layer - ANS - Layer of airflow over a surface that demonstrates local
airflow retardation due to viscosity
DEFINE - Camber & Camber Types - ANS - Curvature of the MCL. Max distance between
MCL and chord. Symmetric, Positive, Negative
DEFINE - Chord - ANS - The straight line from the Leading Edge to the Trailing Edge.
DEFINE - Chordwise Airflow - ANS - Perpendicular to Leading Edge, accelerating over the
wing producing lift
DEFINE - Elastic Limit - ANS - Maximum load that may be applied to a component without
permanent deformation
DEFINE - Flight Path - ANS - Aircraft's CG movement through an air mass
DEFINE - Form Drag - ANS - Drag resulting from separation of airflow from a surface and the
'low pressure wake' that is created. Often referred to as pressure drag, profile drag, or plate
drag.
DEFINE - Friction Drag - ANS - Interaction of airflow on the surface of the aircraft
, DEFINE - Limit Load - ANS - Greatest load factor an airplane can sustain without risk of
permanent deformation. Maximum load anticipated in normal operations. 2/3 of Ultimate Load
DEFINE - Max Angle of Climb - ANS - Gaining the most altitude in a given amount of
horizontal distance
DEFINE - Max Glide Endurance - ANS - Maximum time in glide. Minimum rate of descent
occurs at bottom of power curve.
DEFINE - Max Glide Range - ANS - Maximum distance traveled in a glide. Minimum angle of
descent occurs at L/Dmax. Minimum drag.
DEFINE - Max Rate of Climb - ANS - Gaining the most altitude in a given amount of time
DEFINE - Maximum Endurance - ANS - Max time for a given amount of fuel
DEFINE - Maximum Range - ANS - Farthest distance for a given amount of fuel
DEFINE - Mean Camber Line (MCL) - ANS - Line from the Leading Edge to Trailing Edge that
is halfway between upper and lower surfaces of the airfoil
DEFINE - Moment - ANS - Created when a force is applied at some perpendicular distance
from a rotation point
DEFINE - Parasite Drag - ANS - Form Drag + Friction Drag. Not associated with lift.
Dp=1/2pV^2*f
DEFINE - Pitch Attitude - ANS - Angle between longitudinal axis and horizon
DEFINE - Relative Wind - ANS - Opposite direction of the flight path
DEFINE - Spanwise Airflow - ANS - Parallel to Leading Edge, does not create lift
DEFINE - Stall - ANS - A condition of flight in which an increase in AOA will result in a
decrease in CL
DEFINE - Steady Airflow - ANS - P, p, Temp, V stay constant at each particular point in
streamtube
DEFINE - Takeoff and landing airspeeds in terms of stall speed - ANS - 20% FoS. Vt/o =
1.2Vs
30% Fos. Vldg - 1.3Vs
