SPC Weight and Balance 2

Question 1

What is the 'center of gravity' (CG) of an aircraft?

Accepted Answer

The point through which the total weight of the aircraft acts vertically downward

Answer

The CG is the theoretical point through which the entire weight of the aircraft is considered to act, and it must remain within prescribed limits for safe flight.

Question 2

What effect does exceeding the maximum gross weight have on an aircraft's stall speed?

Accepted Answer

Stall speed increases

Answer

Operating above maximum gross weight increases stall speed because the wings must generate more lift, requiring a higher angle of attack before stalling.

Question 3

A pilot calculates the total moment for a loaded aircraft. The next step to find the actual CG location is to:

Accepted Answer

Divide total moment by total weight

Answer

CG location (in inches from datum) is found by dividing total moment by total weight, giving the distance from the datum to the balance point.

Question 4

What is a 'moment envelope' (CG envelope) used for in weight and balance?

Accepted Answer

Determining approved CG range at various aircraft weights

Answer

The moment envelope (or CG envelope) is a graph in the POH that shows the acceptable range of CG positions at various weights, allowing pilots to verify the aircraft is safely loaded.

Question 5

Which of the following is generally NOT included when calculating an aircraft's useful load?

Accepted Answer

Permanently installed avionics

Answer

Permanently installed avionics are part of the basic empty weight, not useful load; useful load consists of items the pilot adds, such as occupants, baggage, and usable fuel.

(SPC) Student Pilot Certificate Practice Test

(SPC) Student Pilot Certificate Practice Test

SPC Weight and Balance 2