Jeppesen Oral- Chapter 6 (Weight & Balance) Flashcards
Aircraft will be tail heavy, unable to recover from a stall
The aircraft will have to be weighed and new weight and balance records would have to be prepared
Tare weight is the weight of anything on the scales that is not part of the aircraft. It must be subtracted from the scale weight to determine the net weight
If the weight and balance records are up-to-date, new weight and CG can be determined by computation
To provide maximum safety
Imaginary vertical plane, perpendicular to the longitudinal axis. Reference point from which all longitudinal measurements are made
Weight of item multiplied by its arm (distance between item and datum)
Measure the distance between the item and the datum, or use supplied data from manufacturer
Add weight
Remove weight
Remove weight
Add weight
Aircraft with more than one category may have two different gross weight and different useful loads
All equipment not permanently installed in the aircraft or included in the equipment list should be removed from the aircraft
Any fuel that remains in the tanks, lines and engines after the system has been drained
Any oil that remains in the tanks, lines and engines after the system has been drained
Either drain the fuel system until only unusable fuel remains, or fill the tanks full and subtract out the weight of the usable fuel
Leveling instructions are found in the TSDS Any aircraft can be leveled via a spirit level at specified points or may be leveled with a plum bob along with a leveling protractor
The distance between the leading and trailing edge of the wing, measured parallel to the normal airflow over the wing, is known as the chord. The width of the wing is greatest where it meets the fuselage at the wing root and progressively decreases toward the tip. As a consequence, the chord also changes along the span of the wing. The average length of the chord is known as the mean aerodynamic chord (MAC).
Inches from datum Percentage of MAC
Method for determining how to distribute the load so to keep the CG within limits
Added to bring CG into allowable limits
Add ballast in the tail to move cg aft
Helicopters have a much smaller CG
In the aircraft flight manual or weight and balance records required by FAR 23.1583
This makes it possible to find the point about which the aircraft would balance (the center of gravity).
For flight safety and for most efficient performance of the aircraft.
A force that tends to cause rotation. It is the product of the weight of an object in pounds and the distance of the object from the datum in inches.
Multiply the weight of the item in pounds by its distance from the datum in inches.
The distance, in inches, between the center of gravity of the item and the datum.
The different categories under which an aircraft can be licensed have different maximum gross weights and different center of gravity ranges.
The weight of the fuel and its moment must be subtracted from the weight and moment of the aircraft as it was weighed.
The weight of the chocks and other items that are used to hold the aircraft on the scales.
It must be subtracted from the scale reading to find the weight of the aircraft.
No more fuel than the quantity necessary for one-half hour of operation at rated maximum continuous power. It is the maximum amount of fuel used in weight and balance computation when low fuel may adversely affect the most critical balance conditions.
The maximum permissible weight of a loaded aircraft (passengers, crew, cargo, etc.), less its fuel
The aircraft is weighed, 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.
Weight that is permanently installed in an aircraft to bring the empty weight center of gravity into allowable limits.
a helicopter
All of the equipment listed in the AIrcraft Equipment List as “required equipment” or as equipment that is permanently installed.
If the empty weight 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 allowable CG range. Not all aircraft have an EWCG range.
