Ch 3B - Stability Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Most training aircraft are designed with

A

Positive static and positive dynamic stability

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2
Q

All aircraft movement takes place around the

A

Longitudinal, lateral, and vertical axes; which pass through the CG

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3
Q

Longitudinal stability

A

Lateral axis; affected by center of pressure, CG, power changes, and design of the horizontal stabiltizer

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4
Q

Lateral stability

A

Longitudinal axis; affected by wing dihedral, sweepback, keel effect, weight distribution

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5
Q

Directional stability

A

Vertical axis; maintained by the vertical tail

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6
Q

Dutch roll

A

Most likely to occur with weak directional stability and strong lateral stability

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7
Q

Spiral instability

A

Aircraft with directional stability and weak lateral stability are susceptible to

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8
Q

A stall will always occur

A

When the critical angle of attack (Clmax) is exceeded and can occur at any airspeed, in any configuration or attitude

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9
Q

A spin will not develop unless

A

Both wings are stalled

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10
Q

A normal erect spin

A

Results in the airplane entering a nose-low autorotative descent with one wing stalled more than the other, but both are stalled

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11
Q

An airplane is said to be inherently stable

A

Will require less effort to control

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12
Q

An airplane loaded to its CG limit will

A

Be less stable at all speeds

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13
Q

As the CG moves aft

A

The airplane becomes more difficult to control; if CG beyond the aft limit, it could be impossible to lower the nose to recover from a stall or spin

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14
Q

A power reduction will

A

Decrease the downwash on the horizontal stabilizer causing the nose to pitch down

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