Mechanics Flashcards
who is daniel bernoulli
developed the laws explaining how wings produce lift
explain the bernoulli principle
velocity in = pressure decreases = lift
higher pressure on the bottom causes wing to rise
what meets relative wind first (usually rounded)
leading edge
last portion of airfoil to contact relative wind
trailing edge
curve away from center line (chord)
camber
imaginary line connecting the leading edge to the trailing edge
chord line (cuts airflow in half)
what is the angle of attack
the angle of airfoil to the relative wind
angle between wind and chord line
what are the four forces of flight
lift, thrust, weight, and drag
define thrust
power put into aircraft
define weight
gravity pulling aircraft down
define drag
friction- stuff that pulls aircraft back
what does it mean to be in balance
straight and level
lift=weight
thrust=drag
what are the axes of an aircraft
longitudinal, lateral,
vertical
what is longitudinal axis
produces roll(movement left and right)
ailerons
what is vertical axis
yaw (direction facing)
left & right rudder
what is the lateral axis
pitch up and down(clime and descend)
elevator
define control instruments
current state of aircraft power setting and attitude- bare necessity is the engine operation how it should
define performance instruments
how the aircraft responds to our commands- backup information
definition navigational instruments
aircraft location and communication
types of engines
lots of turbine or reciprocating
types of aircraft systems
fuel- gas from tank to engine
hydraulic- fluids
electrical- most important requirement for all other to work
define navigation
the science of getting things from place to place
define a great circle
any circle passing thought earths center
define a small circle
any circle not passing through earths center
a system constructed as a sphere to match the surface of the earth h
global coordinate system
define latitude
ladder- parallel and extended north and south of equator
define longitude
run both and south from the poles starting in prime meridian
what is dead reckoning
planing what you will see and the seed and where you are going
what is pilotage
having no plans just using charts a type of navigation
