Term
What is the difference between fixed-wing and helicopter CG ranges? |
|
Definition
Helicopters have a more restricted CG range |
|
|
Term
What are the most common leveling methods used in weight and balance procedures? |
|
Definition
A spirit level or plumb bob at the manufactures designated leveling points |
|
|
Term
What is ballast and why is it used in aircraft? |
|
Definition
Ballast is any weight added or removed to obtain a desired CG. |
|
|
Term
What is meant by the terms residual fuel and residual oil? |
|
Definition
Fuel and oil remaining in the tanks, lines and engine after draining |
|
|
Term
What is an aircraft loading graph? |
|
Definition
A method for determining load distribution to keep the weight and operating CG within an approved range |
|
|
Term
What is meant by positive and negative moments? Any weight item removed is minus weight and any weight item added is a plus weight. |
|
Definition
Multiplying a weight by an arm will result in a plus moment if the signs are alike and a negative moment if the signs are unlike |
|
|
Term
How is the arm of an item of equipment obtained when computing aircraft weight and balance. |
|
Definition
The arm is usually included in the aircraft specification or may be obtained by an actual measurement |
|
|
Term
How would you determine the empty weight and empty weight CG of an aircraft if all the weight and balance records are missing? |
|
Definition
By reweighing the aircraft and a new set of weight and balance records computed and compiled |
|
|
Term
What should be done concerning fuel when weighing an aircraft for weight and balance purposes? |
|
Definition
Have the aircraft in a level attitude and drain the fuel system until empty |
|
|
Term
What is the purpose of aircraft weight and balance control? |
|
Definition
|
|
Term
How is the moment of an item of equipment obtained when computing aircraft weight and balance? |
|
Definition
By multiplying the weight of an item by its horizontal distance from the datum |
|
|
Term
What undesirable flight characteristic is most likely to result from exceeding the forward CG limit of an aircraft? |
|
Definition
It may lead to insufficient stability resulting in difficulty controlling the aircraft |
|
|
Term
The forward CG limit of an aircraft is exceeded by the installation of several items of equipment in the engine compartment. How can this problem be corrected or compensated for without removing or changing any of the newly-installed equipment? |
|
Definition
By using ballast to obtain the desired CG balance |
|
|
Term
What is the tare weight and how is it handled when making weight and balance calculations? |
|
Definition
Extra weight such as jacks, blocks and chocks are subtracted from the total weight |
|
|
Term
What is the datum of an aircraft and what is its function? |
|
Definition
The datum is an imaginary vertical plane from which all horizontal measurements are taken |
|
|
Term
How can you determine the effect of a new item of equipment on the aircraft weight and balance without weighing the aircraft? |
|
Definition
Basic computations if the weight and balance records are up to date |
|
|
Term
How is a negative moment obtained aft of the datum? |
|
Definition
|
|
Term
How is a positive moment obtained forward of the datum? |
|
Definition
|
|
Term
How is a negative moment obtained forward of the datum |
|
Definition
|
|
Term
Name one common leveling method used in weight and balance procedures. |
|
Definition
The use of a spirit level at the manufacturers designated leveling points |
|
|
Term
Why is an aircraft category a factor when computing weight and balance? |
|
Definition
Aircraft certificated in both normal and utility categories may have two useful loads due to different gross weights |
|
|
Term
What does the term mean aerodynamic chord MAC refer to? |
|
Definition
MAC is the average chord or distance from the leading edge to the trailing edge of an airfoil, usually a wing measured in cross section |
|
|