NIFE AERO
What is a vector?
direction and magnitude
What is air density?
Total mass of air particles per unit volume. m/v
What is a moment?
Force that is moved some distance.
What are the requirements for an airplane to be in equilibrium flight?
Sum of all forces and all moments around the center of gravity are equal to 0
Can equilibrium flight be achieved in a turn?
No. Acceleration is occurring. There are moments
What are the requirements for an airplane to be in trimmed flight?
Sum of moments around the center of gravity must equal 0
What remains constant in trimmed flight?
Aircraft attitude
Can trimmed flight be achieved in a turn?
Yes
What is the relationship between temperature and air altitude? How man degrees per how many
feet? And what is it called?
Air temp decreases linearly with an increase in altitude at 2C per 1000 feet, until 36000 feet.
Average lapse rate
What is a streamline?
, Path air particles flow in steady airflow
What is a streamtube and what kind of system is it?
Collection of many adjacent streamlines. Closed system
What is the relationship between humidity and air density?
Humidity increases, density decreases
What is the General Gas Law?
P=pRT (variation of PV=mRT
When does steady airflow occur?
When static pressure, density, temperature, and velocity remain constant over time. Think flight
conditions need to stay the same.
What is the continuity equation?
A1v1 = A2v2
What is Bernoulli's Equation?
Pt=Ps+(1/2)pV^2 q represents dynamic pressure
What is indicated airspeed? (IAS)?
Actual instrument indication of the dynamic pressure the airplane is exposed to during flight?
What is calibrated airspeed (CAS)?
IAS corrected for position/ instrument error
What is Equivalent airspeed? (EAS)?
True airspeed at sea level on a standard day that produces the same dynamic pressure as the
actual flight condition. CAS corrected for compressibility effects (closer to mach speeds where
compressibility is considered)
What is lift always perpendicular to?
Relative wind
What is a vector?
direction and magnitude
What is air density?
Total mass of air particles per unit volume. m/v
What is a moment?
Force that is moved some distance.
What are the requirements for an airplane to be in equilibrium flight?
Sum of all forces and all moments around the center of gravity are equal to 0
Can equilibrium flight be achieved in a turn?
No. Acceleration is occurring. There are moments
What are the requirements for an airplane to be in trimmed flight?
Sum of moments around the center of gravity must equal 0
What remains constant in trimmed flight?
Aircraft attitude
Can trimmed flight be achieved in a turn?
Yes
What is the relationship between temperature and air altitude? How man degrees per how many
feet? And what is it called?
Air temp decreases linearly with an increase in altitude at 2C per 1000 feet, until 36000 feet.
Average lapse rate
What is a streamline?
, Path air particles flow in steady airflow
What is a streamtube and what kind of system is it?
Collection of many adjacent streamlines. Closed system
What is the relationship between humidity and air density?
Humidity increases, density decreases
What is the General Gas Law?
P=pRT (variation of PV=mRT
When does steady airflow occur?
When static pressure, density, temperature, and velocity remain constant over time. Think flight
conditions need to stay the same.
What is the continuity equation?
A1v1 = A2v2
What is Bernoulli's Equation?
Pt=Ps+(1/2)pV^2 q represents dynamic pressure
What is indicated airspeed? (IAS)?
Actual instrument indication of the dynamic pressure the airplane is exposed to during flight?
What is calibrated airspeed (CAS)?
IAS corrected for position/ instrument error
What is Equivalent airspeed? (EAS)?
True airspeed at sea level on a standard day that produces the same dynamic pressure as the
actual flight condition. CAS corrected for compressibility effects (closer to mach speeds where
compressibility is considered)
What is lift always perpendicular to?
Relative wind
