Weight and balance Flashcards
Oral questions
if an aircraft is loaded so that the aft C.G. limit is exceeded what undesirable flight characteristics is likely to result?
The aircraft will be tail heavy and may be unable to recover from a stall or spin
if all the records for an aircraft are missing how would you determine the empty weight and empty weight C.G.
The aircraft have to be weighted and a new weight and balance records would have to be prepared
define tare weight and describe how it is handle when weight and aircraft
tare weight is the weigh of anything on the scales that is not part of the aircraft . it must be subtracted from the scale weigh reading to determine the net weight of the airplan
if a piece of equipment such as a radio is aded to an aircraft how can you determine the effect on weight and balance with out reweighing the aircraft
If the weight and balance records are up to date a new weight and C.G. location can be determine by computation
Why is control of the weight and balance of an aircraft important
to provide maximum safety
what is the datum of an aircraft and what s its function
The datum is the imaginary vertical plane at right angles to the longitudinal axis of the airplane. it is the reference point from which all horizontal measurements are taken
how do you determine the moment of an item of equipment
the weight of the item is multiplied by its arm which is the distance between the item and the datum
what are two ways of determine the moment the arm of an item of equipment
measure the distance between the item and the datum or use data supply by the manufacture
what should be done to obtain a positive plus moment aft of the datum
Add weight
what should be done to obtain a negative (minus) moment aft of the datum
remove weight
what should be done to obtain a positive (plus) moment forward of the datum
Remove weight
what should be done to obtain a negative (minus)moment forward the datum
Add weight
how does the category of an aircraft affect its loaded weight
Aircraft certificated in more than one category such a normal and aerobatic may have two different maximum gross weights and different useful loads
what should you do with the equipment that is not permanently installed in the aircraft when weighing
all equipment not permanently installed should be removed
what is residual fuel
Any fuel remain in line, tanks, and engine after the system has been drained
How should you account for fuel when weighing an aircraft to determine weight and balance
either drain the fuel system until only unusable fuel remains or fill the tanks full and subtract out the weight of the useful fuel
where are the leveling instructions found and describe one method of leveling aircraft
In the TCDS. using a spirit level in specific points or using plum bob from a designated point along with a leveling scale protractor
define Mean aerodynamic chord or MAc
Mean aerodynamic chord is the chord drawn through the center of the wing plan area
Describe the two most common ways of showing the C G location and /or CG range
in inches from the datum or in percent of MAC
what is the purpose of an aircraft loading graph
it is a method for determine how to distribute the load so as to keep the CG with allowable limits
whats ballast and why would you use it in an airplane
Ballast is weight added to an airplane to bring the CG into allowable or desired range
Installation of several new radios in the nose of an aircraft causes the forward CG limit to be exceeded. How can you correct the problem without removing the new equipment
Ballast may be installed in the tail to move the CG aft.
How does the CG range of a helicopter compare to that of a fixed-wing airplane
Helicopters typically have a much smaller CG range than airplanes
