NIFE Aero
4-H Club - ANS - High, Hot, Heavy, Humid
Cause extended takeoff and landing distances
A positively cambered airfoil produces lift at: - ANS - zero AOA
Accelerated Stall Lines - ANS - Represent the max load factor that an airplane can produce
based on airspeed
Determined by CLmax AOA
Curving lines on the left side of V-n diagram
Adverse pressure gradient - ANS - strongest at high lift conditions and at high angles of attack
in particular
Aerodynamic Breaking - ANS - Accomplished by increasing the parasite drag on the airplane
by holding a constant pitch attitude after touchdown and exposing more of the airplane's surface
to relative wind
Aerodynamic Center - ANS - point along the chordline around which all changes in
aerodynamic force take place
Air Density - ANS - The total mass of air particles per unit of volume
Angle of Attack - ANS - Angle between the relative wind and the chordline of an airfoil
Angle of Incidence - ANS - Angle between plane's longitudinal axis and the chordline of the
wing
Another way to reduce induced drag - ANS - install devices that impede spanwise airflow
around the wingtip (winglets, wingtip tanks, missile rails)
as airplane weight decreases, what happens to stall speed - ANS - decreases
As AOA increases, Cl - ANS - increases until ClMax
The AOA here is ClMax AOA (most efficient AOA)
As AOA increases... - ANS - Cl initially increases
, Atmospheric static pressure - ANS - Weight of a column of air over a given area
Average chord - ANS - The average of every chord from the wing root to the wingtip.
Bernoulli's Principle - ANS - Total energy of a fluid can be separated into potential energy
(static pressure) and kinetic energy (dynamic pressure)
Best way to deal with wing tip vortice - ANS - Avoidance
Interval of 2 mins distance
Calibrated Airspeed - ANS - When indicated airspeed is corrected for instrument error
Camber of airfoil - ANS - Max distance from MCL and chordline, measured perpendicular to
chordline
Chord - ANS - Precise measurement between the leading and trailing edges measured along
the chordline
Chordline - ANS - infinitely long, straight line which passes through its leading and trailing
edges.
Chordwise Flow - ANS - Flows at right angles to leading edge of airfoil
Flow that accelerates over a wing and produces lift
Cl includes - ANS - compressibility
aspect ration
viscosity
AOA
camber
Climb performance is divided into two types - ANS - Angle of Climb: comparison of altitude
gained to distance traveled
Rate of Climb: comparison of altitude gained relative to the time needed to reach that altitude
CoG - ANS - point at which all weight is considered to be concentrated and about which all
forces and moments are measured
Components of Aerodynamic Force - ANS - Lift and Drag
Continuity Equation - ANS - A1V1 = A2V2
4-H Club - ANS - High, Hot, Heavy, Humid
Cause extended takeoff and landing distances
A positively cambered airfoil produces lift at: - ANS - zero AOA
Accelerated Stall Lines - ANS - Represent the max load factor that an airplane can produce
based on airspeed
Determined by CLmax AOA
Curving lines on the left side of V-n diagram
Adverse pressure gradient - ANS - strongest at high lift conditions and at high angles of attack
in particular
Aerodynamic Breaking - ANS - Accomplished by increasing the parasite drag on the airplane
by holding a constant pitch attitude after touchdown and exposing more of the airplane's surface
to relative wind
Aerodynamic Center - ANS - point along the chordline around which all changes in
aerodynamic force take place
Air Density - ANS - The total mass of air particles per unit of volume
Angle of Attack - ANS - Angle between the relative wind and the chordline of an airfoil
Angle of Incidence - ANS - Angle between plane's longitudinal axis and the chordline of the
wing
Another way to reduce induced drag - ANS - install devices that impede spanwise airflow
around the wingtip (winglets, wingtip tanks, missile rails)
as airplane weight decreases, what happens to stall speed - ANS - decreases
As AOA increases, Cl - ANS - increases until ClMax
The AOA here is ClMax AOA (most efficient AOA)
As AOA increases... - ANS - Cl initially increases
, Atmospheric static pressure - ANS - Weight of a column of air over a given area
Average chord - ANS - The average of every chord from the wing root to the wingtip.
Bernoulli's Principle - ANS - Total energy of a fluid can be separated into potential energy
(static pressure) and kinetic energy (dynamic pressure)
Best way to deal with wing tip vortice - ANS - Avoidance
Interval of 2 mins distance
Calibrated Airspeed - ANS - When indicated airspeed is corrected for instrument error
Camber of airfoil - ANS - Max distance from MCL and chordline, measured perpendicular to
chordline
Chord - ANS - Precise measurement between the leading and trailing edges measured along
the chordline
Chordline - ANS - infinitely long, straight line which passes through its leading and trailing
edges.
Chordwise Flow - ANS - Flows at right angles to leading edge of airfoil
Flow that accelerates over a wing and produces lift
Cl includes - ANS - compressibility
aspect ration
viscosity
AOA
camber
Climb performance is divided into two types - ANS - Angle of Climb: comparison of altitude
gained to distance traveled
Rate of Climb: comparison of altitude gained relative to the time needed to reach that altitude
CoG - ANS - point at which all weight is considered to be concentrated and about which all
forces and moments are measured
Components of Aerodynamic Force - ANS - Lift and Drag
Continuity Equation - ANS - A1V1 = A2V2
