# ground lesson 3

 EFFECTS OF OVERLOADING An overloaded aircraft may fail to become airborne, while out-of-limits centre of gravity seriously affects the stability and controllability CENTRE OF GRAVITY is the point at which the aircraft would balance if it were possible to suspend it at that point. It is the theoretical point at which the entire weight of the aircraft is assumed to be concentrated. WEIGHT X ARM = MOMENT arm = distance of the object to a reference point (or datum). moment= weight of the object multiplied by the arm. In other words, moment is a force which results from an object's weight acting at a distance. the summation of "moments" helps you determine(calculate) your airplane's balance point (or the center of gravity). WEIGHT AND BALANCE CALCULATION, TABULAR METHOD instead of calculating Moments they are listed in tables next to the corresponding weights WEIGHT A measure of the heaviness of a particular object. ARM horizontal distance in inches from the reference datum line to the center of gravity of an item.The algebraic sign is plus (+) if measured aft of the datum, and minus (–) if measured forward of the datum. MOMENT The product of the weight of an object multiplied by its armExpressed in pound-inches (lb.-in).Total moment of an aircraft is it’s weight multiplied by the distance between the datum and the CG. DATUM An imaginary vertical plane from which all horizontal distances are measured for balance purposes. WEIGHT AND BALANCE CALCULATIONS, GRAPHIC METHOD Instead of calculating by hand or using a table, the graphing method uses a graph to make the calculation for you. Authorsock234 ID237381 Card Setground lesson 3 Descriptionground lesson Updated2013-09-27T18:51:10Z Show Answers