Symbols and Definitions

Question 1

What is Density?

Answer 1

Density ρ (Rho) is the mass per unit volume of a substance.

Question 2

How is the unit of density used?

Answer 2

The unit of density used is kg per m3.

Question 3

What is density at any unspecific point?

Answer 3

ρ (Rho)

Question 4

What is density at MSL and value of the density?

Answer 4

ρ0 (little o)with a value of 1.225kg/m^3

Question 5

What is Velocity?

Answer 5

Velocity refers to a body in uniform motion in a straight line

Question 6

What does True Airspeed (TAS) equal?

Answer 6

V

Question 7

What does equivalent Airspeed (EAS) equal?

Answer 7

V1 (little 1)

Question 8

What is pressure?

Answer 8

Pressure in general refers to various forces that exist around an aerofoil.

Question 9

What is the symbol static pressure at any unspecified point?

Answer 9

Static Pressure at any unspecified point = p (1013.25hPa OR 29.92”Hg at 15°C at Mean Sea Level)

Question 10

What is the symbol free streamed static pressure?

Answer 10

po

Sidenote the o is meant to be little.

Question 11

What is the symbol for dynamic pressure?

Answer 11

q

Question 12

What is the equation for dynamic pressure?

Answer 12

½ρV^2

Question 13

A coefficient is which type of value?

Answer 13

dimensionless values

Question 14

What does he Lift Coefficient (CL) measure?

Answer 14

the wings lifting capability.

Question 15

What is the common point that three axes on an aircraft pass through?

Answer 15

The centre of gravity (CG).

Question 16

Where does the longitudinal axis run and what does the aircraft do around this axis?

Answer 16

Longitudinal axis runs through the fuselage from the nose to the tail (Green) – the aircraft ROLLS around this axis

Question 17

Where does the lateral axis run and what does the aircraft do around this axis?

Answer 17

The Lateral axis runs from wing tip to wing tip (Blue) – the aircraft PITCHES around this axis

Question 18

Where does the normal axis run and what does the aircraft do around this axis?

Answer 18

The Normal axis runs vertically perpendicular to the other two axes (Red) - the aircraft YAWS around this axis

Question 19

A force is described in terms of:

Answer 19

its point of application.
its size.
its direction.