General: I I I - Weight And Balance

Front 1

When should an aircraft be reweighed?

Back 1

after extensive repair or alteration that could change its weight or center of gravity

Front 2

why must we consider the category under which an aircraft is licensed when we compute its weight and balance

Back 2

the different categories under which an aircraft can be licensed have maximum gross weights and different center of gravity ranges

Front 3

where can you find the leveling means that are specified for a particular aircraft

Back 3

aircraft type certificate data sheet

Front 4

what is meant by the tare weight that is used in a weight and balance computation

Back 4

the weight of the chocks and other items that are used to hold the aircraft on the scales

Front 5

what must be done to the tare weight when an aircraft is weighted

Back 5

it must be subtracted from the scale reading to find the weight of the aircraft

Front 6

why are the distances of all items installed in a aircraft measured from the datum when computing weight and balance

Back 6

this makes it possible to find the point about which the aircraft would balance. (center of gravity)

Front 7

which has more critical center of gravity range, an airplane or a helicopter

Back 7

a helicopter

Front 8

What is included in the empty weight of an aircraft?

Back 8

the weight of the airframe, engines, and all items of operating equipment that have fixed locationsand are permanetly installed in the aircraft. Empty weight includes optional and special equipment, fixed ballast, full reservoirs of hydraulic fluid and engine lubricating oil and unusable fuel

Front 9

Where is the maximum allowable gross weight of an aircraft found?

Back 9

in the type certificate data sheets for the aircraft

Front 10

what equipment must be installed in an aircraft when its weighted to find its empty weight center of gravity

Back 10

all of the equipment that is listed in the aircraft equipment list as required equipment or as equipment permanently installed

Front 11

what is meant by permanent ballast for an aircraft

Back 11

weight that is permanently installed in an aircraft to bring empty weight center of gravity into allowable limits

Front 12

Is there a federal regulation requiring that all private aircraft be reweighed periodically?

Back 12

No

Front 13

What must be done with temporary ballast when weighing an aircraft?

Back 13

it must be removed from the aircraft

Front 14

what must be done to find the empty weight of an aircraft if it has been weighted with fuel in its tanks

Back 14

the weight of the fuel and its moment must be subtracted form the weight and moment of the aircraft as it was weighted

Front 15

what is meant by minimum fuel as is used in the computation of aircraft weight and balance

Back 15

no more fuel than the quantity necessary for one half hour operation at a rated maximum continuous power. it is the maximum amount fuel used in a weight and balance computations when low fuel may adversely affect the most critical balance conditions.

Front 16

what is meant by maximum zero fuel weight of an aircraft

Back 16

the maximum permissible weight of a loaded aircraft ( passengers, cargo, crew, ect..)less its fuel

Front 17

what its meant for undrainable fuel

Back 17

the fuel that is left in the tank, lines and components when the aircraft is placed in a level flight position and the fuel drained at the main fuel strainer. this is also called residual fuel

Front 18

describe the way you would find the empty weight and empty weight center of gravity of an airplane if there is no weight and balance records available

Back 18

the aircraft is weighted, and the empty weight center of gravity is computed, these values are recorded in new weight and balance records that are started for the aircraft

Front 19

what are the two reasons weight and balance control are important in an aircraft

Back 19

for safety of flight and for most efficient performance of the aircraft

Front 20

Where is the center of gravity for most airplanes located in relation to the center of lift?

Back 20

the CG is normally ahead of the center of lift

Front 21

what is meant by the datum that is used for weight and balance computations

Back 21

a readily identified reference chosen by the aircraft manufacturer from which all longitudinal locations on the aircraft are referenced

Front 22

what is meant by the moment in the computation of weight and balance

Back 22

a force that tends to cause rotation. it is the product of the weight of a object in pounds and the distance of the object from the datum in inches

Front 23

how do you find the moment of an item that it is installed in an aircraft

Back 23

multiply the weight of the item in pounds by its distance from the datum in inches

Front 24

what is meant by the arm of an item that is installed in an aircraft

Back 24

the distance, in inches, between the center of gravity of the item and the datum.

Front 25

where do you find the arm of and item installed in an aircraft recorded

Back 25

in the type certificate data sheets for the aircraft

Front 26

What is meant by a moment index?

Back 26

a moment divided by a constant such as 10, 100 or 1000

Front 27

What is meant by the center of gravity range?

Back 27

the distance in inches between the forward allowable center of gravity and the rear-ward allowable center of gravity

Front 28

what is the significance of the empty weight center of gravity range on an aircraft

Back 28

if the empty center of gravity falls within the EWCG range, the aircraft cannot be legally loaded in such a way that its loaded center of gravity will fall outside of the allowance of CG range. not all aircraft have a EWCG range.

Front 29

why is empty weight center of gravity range not give in in the type certificate data sheets for some aircraft

Back 29

the empty weight center of gravity range is given only for aircraft that cannot be legally loaded in such a way that their loaded center of gravity will fall outside of the allowable limits

Front 30

What is meant by the mean aerodynamic chord (MAC)

Back 30

the chord of an imaginary airfoil that has the same aerodynamic characteristics as the actual airfoil

Front 31

What is a loading envelope?

Back 31

the enclosed area on a graph of an airplane's loaded weight and CG location. If lines drawn from the weight and CG cross within this envelope the airplane is properly loaded

Front 32

What is meant by permanent ballast for an aircraft?

Back 32

weight that is permanently installed in an aircraft to bring empty weight center of gravity into allowable limits

Front 33

where must a record be kept of the current empty weight and the current center of gravity of an aircraft

Back 33

in the aircraft flight manual or weight and balance records required by 14 cfr 23.1583