Regional Gliding School Turbulence is an irregular motion of air resulting from “eddies” and...

Regional Gliding School

Turbulence is an irregular motion of air resulting from “eddies” and vertical currents. Can cause light bumps or loss of control.


Mechanical Turbulence (eddies) Friction between the air and the ground from irregular terrain and man-made obstacles, causes eddies.

Thermal Turbulence Happens on hot sunny days when the sun heats the earth’s surface unevenly. Isolated convection currents are set in motion and this results in turbulence.

Frontal Turbulence The lifting of the warm air by the sloping frontal surface and friction between the two opposing air masses produce turbulence in the frontal zone.

Wind Shear Marked changes in wind direction and speed either vertical or horizontal. If the change in wind is great you can expect severe turbulence.


Light Momentary slight changes in altitude and/or attitude or a slight bumpiness. Occupants may feel a slight strain

against their seat belts.

Moderate Occupants will feel a definite strain against their seat belts and unsecured objects will be dislodged.

Severe Large and abrupt changes in altitude and/or attitude and usually, large variations in indicated air speed. The airplane may momentarily be out of control.

Extreme Airplane is tossed about violently and is impossible to control. May cause structural damage.


NOTE: You must use the buttons in the Confirmation Stage


A

B

C

D

Mechanical Turbulence

Thermal Turbulence

Let's try a few review questions on Meteorology:

Question #1 - Friction between the air and the ground, especially irregular terrain and man made obstacles is known as .

Frontal Turbulence

Wind Shear

MeteorologyMeteorologyTurbulence & Weather SignsTurbulence & Weather Signs

I’m afraid that answer is incorrect

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Flying Scholarship Program


That answer is correct.

Let's move on...


Mechanical Turbulence (eddies) Friction between the air and theground from irregular terrain and man-made obstacles, causes eddies.

Thermal Turbulence Happens on hot sunny days when the sun heatsthe earth’s surface unevenly. Isolated convection currents are set in motionand this results in turbulence.

Frontal Turbulence The lifting of the warm air by the sloping frontalsurface and friction between the two opposing air masses which produceturbulence in the frontal zone.

Wind Shear Marked changes in wind direction and speed either vertical orhorizontal. If the change in wind is great you can expect severe turbulence.



Question #2 - The irregular motion of air resulting from "EDDIES" and vertical currents is known as .


A

B

C

D

Mechanical Turbulence

Thermal Turbulence

Frontal Turbulence

Turbulence


Let's try again...




Let's move on...


Turbulence is an irregular motion ofair resulting from “eddies” and verticalcurrents. Can cause light bumps or loss ofcontrol.


• barometer is falling• temperature at night is higher is than usual• clouds move in different directions at different

levels• cirrus clouds increase. A large ring appears around

the sun or moon and stays there until the overcast clouds thicken and obscure the sun or moon

• summer afternoon clouds darken

Look For Unsettled Weather When:


• there have been signs of unsettled weather• the wind is southeast to northeast and the pressure

is falling. Rain or snow within a day if the pressure is falling slowly. If falling rapidly, rain or snow soon, with strengthening winds.

Look For Steady Precipitation When:


• cumulus clouds develop in a westerly wind• cumulus clouds develop rapidly in spring or

summer early afternoon

Look For Showers When:


• the barometer rises• wind shifts into west or northwest• the temperature falls

Look For Clearing Weather When:


• sun sets like a ball of fire• barometer is steady or slowly rising• afternoon cloudiness decreases after 3PM to 4PM• morning fog breaks within two hours after sunrise• light breeze from west or northwest• there is a red sunset

Look For Continued Bright Weather When:


NOTE: You must use the buttons in the Confirmation Stage


A

B

C

D

Unsettled Weather

Steady Precipitation


Question #3 - What weather can you expect when the barometer is falling?

Clearing Weather

Showers



Let's try again...




Let's move on...


• barometer is falling• temperature at night is higher is than usual

• clouds move in different directions at differentlevels

• cirrus clouds increase. A large ring appears aroundthe sun or moon and stays there until the overcastclouds thicken and obscure the sun or moon

• summer afternoon clouds darken

Look For Unsettled Weather When:



Question #4 - What weather can you expect when the sun sets like a ball of fire?


A

B

C

D

Unsettled weather

Continuing bright weather

Clearing weather

Showers


Let's try again...




Let's move on...


• sun sets like a ball of fire• barometer is steady or slowly rising

• afternoon cloudiness decreases after 3PM to 4PM

• morning fog breaks within two hours after sunrise

• light breeze from west or northwest

• there is a red sunset

Look For Continued Bright Weather When:


Congratulations!!

You have now completed the Turbulence & Weather Signs lesson of the Meteorology Module. Of course, this lesson is always available to you for future reference if required.

You are now ready to move along to the next Meteorology lesson you have not completed or to any other module you wish. You can advance to the Self Test Module if you feel ready to challenge the final exam.

Good Luck!


Regional Gliding School Turbulence is an irregular motion of air resulting from “eddies” and...

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