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ATF > Ppl > Flashcards

Ppl Flashcards

1
Q

The 4 forces

A

Weight
Lift
Thrust
Drag

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2
Q

I how is lift created?

A

Pressure differential
Downwash

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3
Q

What is pressure differential

A

Difference in pressure b/wn air above and below the wing

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4
Q

Bernoullis theorem

A

Change in static or dynamic pressure may occur but total pressure remains constant
P+(1/2 densityv^2),
Static + dynamic = constant

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5
Q

Chord Line

A

Line drawn from leading edge to trailing edge

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6
Q

Chamber

A

Cross-sectional area of a wing divided into upper and lower chamber

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7
Q

Relative airflow

A

Parallel and OPP the direction of flight.

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8
Q

Aoa

A

Angle b/wn chord line and relative airflow

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9
Q

Stagnation point

A

The point of separation at the leading edge where air flows over or under the wing

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10
Q

Coefficient of lift

A

The amount of lift a wing can create

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11
Q

A o incidence

A

Angle between the chord and longitudinal axis

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12
Q

Center of pressure

A

Lowest pressure highest lift

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13
Q

What is aspect ratio

A

Wingspan/ average chord

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14
Q

Benefits of high aspect ratio

A

More lift less drag
Better fuel efficiency and range
Safer flight at lower speed

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15
Q

Characteristics of Low aspect ratio

A

More maneuverable
Unstable at low speeds

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16
Q

Most common wing platforms

A

Tapered, rectangular, elliptical
Good at low speed
Good lift capability
Unsuitable at high speed and less maneuverable

17
Q

Use of swept wings and tapered wings

A

General aviation

18
Q

Delta and forward swept

A

Military and experimental use
Extremelymaneuverable
Supersonic
Unstable (may need computer assistance)

19
Q

Stall characteristics

A

Tapered stalls first just inboard of the control surfaces
Elliptical stalls near the wing root progresses every forward along chord
Rectangular stalls at wing root first

ATF (1 decks)

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