Final Flashcards
Min fuel?
Meto/12 [gal]
Is hydraulic fluid left in the plane for weighing?
Yes
Weight that is installed in an aircraft for the purpose of bringing CG into the desired range is called what?
Ballast
Is the weight of a permanent ballast included in the empty weight of the aircraft?
Yes
What are the primary reasons for weight and balance?
Safety and performance
What is to be done when the aircraft records are lost or destroyed?
The aircraft must be weighed and a new report must be created.
What is a datum?
An imaginary plane from which all horizontal measurements are taken for balance purposes
The distance between the CG of an object and the reference point is called what?
The arm.
The turning tendency of an object is called what?
A moment
Moments are usually expressed in what?
Inch lbs.
When a weight is added at a negative arm,
What is the moment?
Negative
When a weight is removed at a negative arm, the moment is what?
Positive
When a weight is added at a positive arm, the moment is what?
Positive
When a weight is removed at a positive arm, the moment is what?
Negative
What is the point on an object about which the object would balance if suspended?
The center of gravity
What is the maximum authorized weight of an aircraft and it’s contents while sitting on the ground?
Maximum ramp weight.
What is the weight of an aircraft with all the items of operating equipment installed?
Empty weight
Is residual fuel considered to be part of the empty weight of an aircraft?
Yes
The product of the weight of an item times it’s distance from the datum is called what?
The moment
Where may the maximum certificated weight of an aircraft be found?
In the TCDS.
What is the standard weight of avgas?
6lbs
What is the standard weight of jet fuel?
6.7 lbs per gallon
Standard weight of lubricating oil?
7.5 lbs per gal
What is the importance of the weight aspect? In terms of safety.
G loading
What is the importance of the balance aspect? In terms of safety.
Stability
What is the importance of weight in regards to performance?
The effects of gravity and their forces upon the aircraft
In regards to performance, what is the importance of the balance aspect?
The distribution of gravity and other forces upon the aircraft
Two types of stability?
Static and dynamic.
What concept is weight and balance based on?
A first class lever
What is the pivot point of a lever called?
A fulcrum
What is always true about the moments of a structure that is balanced about a given point?
The sum of those moments is equal to zero
Whose responsibility is it to ensure that the weight and balance info in the POH is correct?
The mechanics
What two types of scales may be used to weigh an aircraft?
Load cell
Platform scale
What position must an aircraft be in for the purpose of weighing?
Level flight attitude
What two documents contain the information about the location of weights necessary to figure out weight and balance problems?
The TCDS and POH
What must be done on aircraft certified before March 1st 1978?
Must correct for the oil, 2 gal @. 7.5lbs gal
What is center of gravity?
The location on an aircraft given in inches from the datum on which all the weight of aircraft can be thought to be concentrated, the sum of all the moments about it can be thought to be zero, the three axes will intersect
What are CG limits?
The locations which are the most forward and most rearward points that the CG is allowed to be located
Buttock line?
A vertical plane, measurements are taken along the longitudinal axis
Water line?
A horizontal plane, measurements taken along the vertical axis
Empty weight CG?
The location of the CG on the aircraft when the aircraft is in the empty weight condition
Useful fuel?
The expendable part of the fuel carried on the aircraft
Maximum gross weight?
The most an airplane can weigh in any condition.
Max landing weight?
The most an aircraft is allowed to weigh at touchdown
Max ramp weight?
The most an aircraft can weigh while
Sitting on the ramp
Max takeoff weight?
The most an aircraft is allowed to weigh at the beginning of the takeoff roll
Empty weight?
Weight of the aircraft with all fixed ballast, unusable fuel, full operating fluids.
MAc?
Mean aerodynamic chord, average chord length of a wing
MAC definition?
The distance from the LEMAC to TEMAC.
Equipment for weighing?
Scales
Tape measure plumb bob
Level
Manuals for leveling
