Weight & Balance Flashcards
Find the empty weight CG location for the following tricycle-gear aircraft. Each main wheel weighs 753 pounds, nose wheel weighs 22 pounds, distance between nose wheel and main wheels is 87.5 inches, nose wheel location is +9.875 inches from the datum, with 1 gallon of hydraulic fluid at -21.0 inches included in the weight scale
+96.11 inches
Which statement is true regarding helicopter weight and balance?
Weight and balance procedures for airplanes generally also apply to helicopters
When an empty aircraft is weighed, the combined net weight at the main gear is 3,540 pounds with an arm of 195.5 inches. At the nose gear, the net weight is 2,322 pounds with an arm of 83.5 inches. The datum line is forward of the nose of the aircraft. What is the empty CG of the aircraft?
151.1
Use of which of the following generally yields the highest degree of aircraft leveling accuracy?
Spirit level(s)
When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?
Parking brakes set
When, or under what condition(s) are adverse loading checks conducted?
Anytime a repair or alteration causes EWCG to fall outside the CG range
The maximum weight as used in weight and balance control of a given aircraft can normally be found
In the aircraft specification or Type Certificate Data Sheet
As weighed, the total empty weight of an aircraft is 5,862 pounds with a moment of 885,957. However, when the aircraft was weighed, 20 pounds of potable water were board at +84, and 23 pounds of hydraulic fluid were in a tank located at +101. What is the empty weight CG of the aircraft?
-151.365
The useful load of an aircraft consists of the
Crew, usable fuel, passengers, and cargo
An aircraft with an empty weight of 2,100 pounds and an empty weight CG +32.5 was altered as follows:
1) Two 18-pound passenger seats located at +73 were removed;
2) Structural modifications were made at +77 increasing weight by 17 pounds;
3) A seat and safety belt weighing 25 pounds were installed at +74.5; what is the new empty weight CG?
+33.68
In an aircraft CG is found to be at 24 percent of MAC, that 24 percent is an expression of the
Distance form the LEMAC
If a 40 pound generator applies +1400 inch pounds to a reference axis, the generator is located
+35 from the axis
When accomplishing loading computations for a small aircraft, necessary information obtained from the weight and balance records would include
Current empty weight and empty weight CG
-Datum is forward of the main gear center point – 30.24 inches
-Actual distance between til gear & main gear center points – 360.26 inches
-Net weight at right main gear – 9,980 pounds
-Net weight at left main gear – 9,770 pounds
-Net weight at tail gear – 1,970 pounds
These items were in the aircraft when weighed:
1) Lavatory water tank full (34 pounds at +352)
2) Hydraulic fluid (22 pounds at -8)
3) Removable ballast (146 pounds at +380)
What is the empty weight cG of the aircraft described above?
60.31 inches
The empty weight of an airplane is determined by
Subtracting the tare weight from the scale reading and adding the weight of each weighing point.
An aircraft had an empty weight of 2,886 pounds with a moment of 101,673.78 before several alterations were made. The alterations included:
1) Removing two passenger seats (15 pounds each) at +71;
3) Installing a seat and safety belt (20 pounds) at +71; and
4) Installing radio equipment (30 pounds) at +94.
The alterations caused the new empty weight CG to move
1.62 inches aft of the original empty weight CG
Two boxes which weigh 10 pounds and 5 pounds are placed in an airplane so that their distance aft from the CG are 4 feet and 2 feet respectively. How far forward of the CG should a third box, weighing 20 pounds, be places so that the CG will not be changed?
2.5 feet
Where do you look to determine the operating CG range when calculating a new aircraft weight and balance document?
It is found in the type certificate data sheet
An aircraft with an empty weight of 1,500 pounds and an empty weight CG pf +28.4 was altered as follows:
1) Two 12-pound seats located at -168.5 were removed;
2) Structural modifications weighing +28 pounds were made at +73;
3) A seat and safety belt weighing 30 pounds were installed at +70.5; and
4) Radio equipment weighing 25 pounds was installed at +85.
What is the new empty weight CG?
+30.30
All other things being equal, if an item of useful load located aft of an aircraft’s CG is removed, the aircraft’s CG change will be
Forward in proportion to the weight of the item and its location in the aircraft
An aircraft’s LEMAC and TEMAC are defined in terms of distance
From the datum