Atmosphere And Speed Flashcards
(19 cards)
Air pressure is what
The weight of a column of air
Air pressure is proportional to what
Density
What is pressure alt
Height above standard
3 things that easily change air density
Temperature, pressure and humidity
IAS
Measure of dynamic pressure
Dynamic pressure equation
0.5 rho V^2
CAS airspeed
IAS correct for instrument and position error
EAS airspeed
CAS corrected for compressibility error
TAS
Actual airspeed of the aircraft through a mass of air
What is the local speed of sound and its relationship with temp
The speed of sound for a certain temperature
Decreases with decreasing temp
What is Mach number
It is TAS as a % relative to the LSS
Why does TAS increase with altitude
Due to a reduction in density
Why is Mach number a function of TAS
Due to alt and temperature change
9 core competencies
-problem solving and decision making
-leadership and team work
-communication
-knowledge
-flight path manual
-flight path automation
-situational awareness
- work load management
-application of procedures
What happens to TAS and IAS when climbing at a constant Mach
They decrease
TAS and Mach when climbing at constant IAS
Both increase
Mcrit
The speed at which any part of the airlfow over the aircraft reaches the speed of sound
When do shockwaves form and their effect
When Mcrit is reached
Loss of lift, increase in drag, handling becomes harder
Why have slats and flaps
Due to swept wings having poorer lift capabilities at lower speed, so HLD devices used to enhance this
