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