DEFINITION OF TERMS Flashcards

1
Q

The point about which an airplane would balance if it were possible to suspend it at that point

A

Center of gravity (CG)

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2
Q

The horizontal distance in inches from the reference datum line to the center of gravity of an item

A

Arm (Moment Arm)

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3
Q

The specified forward and aft points within which the CG must be located during flight

A

Center-of-Gravity Limits

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4
Q

The distance between the forward and aft CG limits indicated on pertinent airplane specifications

A

Center-of-Gravity Range

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5
Q

An imaginary vertical plane or line from which all measurements of arm are taken

A

Datum (Reference Datum)

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6
Q

The maximum weight the floor can
sustain per square inch/foot as provided by the manufacturer

A

Floor Load Limit

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7
Q

The average distance from the leading edge to the trailing edge of the wing

A

Mean Aerodynamic Chord (MAC)

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8
Q

The product of the weight of an item multiplied by its arm

A

Moment

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9
Q

A moment divided by a constant such as 100, 1,000, or 10,000

A

Moment Index (or Index)

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10
Q

A location in the airplane that is identified by a number designating its distance in inches from the datum

A

Station

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11
Q

Normally used with smaller aircraft

With this type of scale, aircraft are
typically lifted off the floor with jacks and
then lowered onto platform scales that are placed under each wheel

A

Platform Scales

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12
Q

Used in large aircrafts placed between
the jack and the jack pad of the aircraft

Strain-gauge capsules whose resistance changes proportionally to the amount of
load imposed on them

A

Load Cells

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13
Q

Permanently installed in an aircraft and must not be removed

A

Permanent Ballast

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14
Q

Typically installed to bring the CG within its range for a specific flight condition

A

Temporary Ballast

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