Aerodynamics Flashcards

1
Q

Altitude pressure ratio

A

Ambiant static pressure/Standard sea level static pressure

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2
Q

Absolute zero Temperature

A

-273°C

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3
Q

Standard Temperature

15°C

A

288°K

absolute temperature

Kelvin Scale

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4
Q

288°K

Is signifies by

A

T0

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5
Q

Temperature Ration

A

Ambient air temperature/Standard sea level air temperature

=C°+273/288

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6
Q

Static Air Pressure

A

Mass of the air supported above that level

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7
Q

Density of air

A

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.

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8
Q

density ratio

A

ambient air density/standard sea level air density

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9
Q

Densit ratio

A

pressure ration/temperature ration

Density varies directly with pressure, and indirectly with temperature.

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10
Q

ASIR

A

Airspeed indicator reading; the uncorrected reading on an airspeed indicator

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11
Q

IAS

A

Indicated airspeed; ASIR corrected only for instrument error

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12
Q

EAS

A

Equivalent airspeed; IAS corrected for position error and compressibility error

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13
Q

TAS

A

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

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14
Q
A
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