Once you are satisfied that the total weight is within prescribed limits, multiply each individual weight by its associated arm to determine its moment. Then, add the moments together to arrive at the total moment for the helicopter. Your final computation is to find the center of gravity of the loaded helicopter by dividing the total moment by the total weight.
After determining the helicopter’s weight and center of gravity location, you need to determine if the CG is within acceptable limits. In this example, the allowable range is between 106.0 inches and 114.2 inches. Therefore, the CG location is within the acceptable range. If the CG falls outside the acceptable limits, you will have to adjust the loading of the helicopter. 
 

LOADING CHART METHOD
You can determine if a helicopter is within weight and CG limits using a loading chart similar to the one in figure 7-6. To use this chart, first subtotal the empty weight, pilot, and passengers. This is the weight at which you enter the chart on the left. The next step is to follow the upsloping lines for baggage and then for fuel to arrive at your final weight and CG. Any value on or inside the envelope is within the range.
 
 

SAMPLE PROBLEM 1
Determine if the gross weight and center of gravity are within allowable limits under the following loading conditions for a helicopter based on the loading chart in figure 7-6.
 

To use the loading chart for the helicopter in this example, you must add up the items in a certain order. The maximum allowable gross weight is 1,600 pounds.
ITEM POUNDS Basic empty weight 1,040 Pilot 135 Passenger 200 Subtotal 1,375 (point A) Baggage compartment load 25 Subtotal 1,400 (point B) Fuel load (30 gallons) 180 Total weight 1,580 (point C)
1 Follow the green arrows in figure 7-6. Enter the graph on the left side at 1,375 lb., the subtotal of the empty weight and the passenger weight. Move right to the yellow line. (point A)
2 Move up and to the right, parallel to the baggage compartment loading lines to 1,400 lb. (Point B)
3 Continue up and to the right, this time parallel to the fuel loading lines, to the total weight of 1,580 lb. (Point C).

Point C is within allowable weight and CG limits. 
 

SAMPLE PROBLEM 2
Assume that the pilot in sample problem 1 discharges the passenger after using only 20 pounds of fuel.