Theory Flashcards
boundary layer
thin layer of air over wings surface
what % of the chord is conventional airfoil the thickest
25%
how do laminar flow airfoils reduce drag
by maintaining laminar flow through a greater % of the chord
Wash-out
decreasing the angle of incidence on wing tip
What wing tip modifications increase lift
Wing tip fuel tanks, winglets, drooping the wing tips
auxiliary airfoils that move
Slats
curvature of the airfoil
camber of an airfoil
EAS
calibrated airspeed
passages in the wing that are similar to slats that affects airflow
slots
in an area of low pressure, if the altimeter isn’t correct it will read…
higher than it should be
density altitude
pressure altitude corrected for temperature
what selects the desired fuel tank to draw from and shut off fuel flow from the tanks
Fuel selector valve
Forward movement of the throttle affects what/how
opens throttle valve, increases air mixture and engine power
what is maintained throughout most of the diameter of the propeller
thrust
what is the distance a propeller travels forward
pitch
what is the manifold pressure gauge reading when the engine is off
atmospheric pressure
altitude increases, air is less dense what happens to your engine
power decrease
effect of surface friction on winds
lowers wind speed from the pressure gradient
an airmass in the troposphere has properties from
temperature and moisture in the horizontal
Down slope winds flowing from high elevation
katabatic wind
upslope winds from valleys to high elevation
anabatic winds
irregular change in wind
gust
weather factors that determine weather in air masses
moisture, cooling process and air stability
characteristics of stable air
stratus, poor visibility, stable winds
characteristics of unstable air
cumulus, good visibility, unstable winds
behaviors of cold and warm air masses
cold air-sinks, dense, undercuts warm air
warm air-less dense, rises over cold air
shortest between two long distances
great circle
angle between true heading and magnetic heading
variation
lines connecting areas of equal variation
isogonic lines
on east and west headings the compass starts turning what direction
south
advantages of Rhumb line
consistent/one continuous heading
agonic lines
lines that connect areas of 0 magnetic variation
percentage of chord that is the thickest
50%
Lubber line
white line that shows the direction you are going using the longitudinal axis
gyroscopic inertia
rigidity in space
flaps create
lift and drag
wash-in
increasing the angle of incidence at the wing tip
