Symbols and Definitions Flashcards
What is Density?
Density ρ (Rho) is the mass per unit volume of a substance.
How is the unit of density used?
The unit of density used is kg per m3.
What is density at any unspecific point?
ρ (Rho)
What is density at MSL and value of the density?
ρ0 (little o)with a value of 1.225kg/m^3
What is Velocity?
Velocity refers to a body in uniform motion in a straight line
What does True Airspeed (TAS) equal?
V
What does equivalent Airspeed (EAS) equal?
V1 (little 1)
What is pressure?
Pressure in general refers to various forces that exist around an aerofoil.
What is the symbol static pressure at any unspecified point?
Static Pressure at any unspecified point = p (1013.25hPa OR 29.92”Hg at 15°C at Mean Sea Level)
What is the symbol free streamed static pressure?
po
Sidenote the o is meant to be little.
What is the symbol for dynamic pressure?
q
What is the equation for dynamic pressure?
½ρV^2
A coefficient is which type of value?
dimensionless values
What does he Lift Coefficient (CL) measure?
the wings lifting capability.
What is the common point that three axes on an aircraft pass through?
The centre of gravity (CG).
Where does the longitudinal axis run and what does the aircraft do around this axis?
Longitudinal axis runs through the fuselage from the nose to the tail (Green) – the aircraft ROLLS around this axis
Where does the lateral axis run and what does the aircraft do around this axis?
The Lateral axis runs from wing tip to wing tip (Blue) – the aircraft PITCHES around this axis
Where does the normal axis run and what does the aircraft do around this axis?
The Normal axis runs vertically perpendicular to the other two axes (Red) - the aircraft YAWS around this axis
A force is described in terms of:
its point of application.
its size.
its direction.
