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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the four acting forces on an aircraft? |
Thrust, Weight, Lift, Drag. |
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If a flight is steady and straight, the forces are____? |
Balanced. |
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Anytime a flight path is not horizontal, what must happen to the force vectors? |
The force vectors must be broken down into two components. |
In a glide, weight vector is directed along the foward flight path, acting as thrust. |
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Define Angle Of Attack (AOA) |
The acute angle between the CHORD LINE of the airfoil and direction of relative wind. |
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Define THRUST |
Horizontal force countering drag. |
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Lift varies with AOA and ___? |
Airspeed |
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Explain the Angle of Attack at various leveled speeds |
High Speed- low AOA; less than 3°
Cruise Speed- moderate AOA; APPROX. 6°
Low Speed- high AOA; Around 12° |
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Define LIFT |
Vertical force countering weight |
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If an aircraft is to keep flying, new air must be ___, and the lift-producing airfoil must ___? |
Attacked; keep moving |
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Lift is proportional to ___. |
The square of aircrafts velocity. |
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L=____? |
L= C•P•V^2•S/2 |
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Doubling the airspeed ___ the lift. |
Quadruples |
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What other factors affect lift and drag? |
Density of the air, temperature, pressure, and humidity. |
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Relative wind |
Wind opposite of flight path |
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