Aerodynamics

Question 1

Altitude pressure ratio

Answer 1

Ambiant static pressure/Standard sea level static pressure

Question 2

Absolute zero Temperature

Answer 2

-273°C

Question 3

Standard Temperature

15°C

Answer 3

288°K

absolute temperature

Kelvin Scale

Question 4

288°K

Is signifies by

Answer 4

T₀

Question 5

Temperature Ration

Answer 5

Ambient air temperature/Standard sea level air temperature

=C°+273/288

Question 6

Static Air Pressure

Answer 6

Mass of the air supported above that level

Question 7

Density of air

Answer 7

is the Mass of air per cubic foot of volume and is a direct measure of the quantity of matter in each cubic foot of air. Air at standard sea level conditions weighs .0765 pounds per cubic foot and has a density of .002378 slugs per cubic foot. At an altitude of 40,— feet the air density is approximately 25 percent of the sea leel value.

Question 8

density ratio

Answer 8

ambient air density/standard sea level air density

Question 9

Densit ratio

Answer 9

pressure ration/temperature ration

Density varies directly with pressure, and indirectly with temperature.

Question 10

ASIR

Answer 10

Airspeed indicator reading; the uncorrected reading on an airspeed indicator

Question 11

IAS

Answer 11

Indicated airspeed; ASIR corrected only for instrument error

Question 12

EAS

Answer 12

Equivalent airspeed; IAS corrected for position error and compressibility error

Question 13

TAS

Answer 13

True airspeed; the true speed of the aeroplane relative to undisturbed air: EAS/square root of σ