Lesson 6: Gliders

A mathematical relationship between the distance an aircraft will glide forward to the altitude loss. (If an aircraft has a glide ratio of 20 to 1, and it is one mile above the earth, it should glide 20 miles before landing.)

(a)  

The height or distance above a reference plane

The most common planes of reference used in aviation are:

heights above sea level and ground level

above average sea level, or mean sea level (MSL),

and above ground level (AGL).

(a)  

Usually a single-engined airplane that will pull a glider from the ground

to an altitude where it can be released.

(a)  

The average rate at which temperature decreases with an increase in altitude.

(The average lapse rate is 3.5°F  per 1,000 ft. increase in altitude.)

(a)  

Fluid motion between regions of unequal heating.

(a)  

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The art of staying aloft by exploiting the energy of the atmosphere.

(a)  

A strong up-and-down waving action that starts as air moves across mountain ranges.

(Sailplane pilots can use the motion of this wave to gain altitude.)

(a)  

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The atmosphere's resistance to vertical motion.

(a)  

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Mass in a given volume (example: 12 eggs in a basket.)

(a)  

A column of air that moves upward.

(a)  

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