Weight and Balance Joey Giangrasso This is a study tool developed by Joey Giangrasso as part of the development training for CFI certification under the supervision of Joseph J. Zubay, CFI.

Weight and Balance Safety Calculating Center of Gravity (CG) Loading configurations

Safety Stay within the limitations

Center of Gravity Location in airplane where all forces are balanced All three axes pass through CG String analogy

CG Range Check it out one time

Weight at a Distance Origin (Place to Start) Weights are known See Saw Middle Weight on both ends

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Airplanes Datum Line=imaginary line of reference Arm=distance from datum (Inches Weight=measured (pounds) Moment

More Terms Gross Take Off Weight max weight at take off 1 gal AvGas = 6 lbs 1 gal Oil = 7.5 lbs Basic Empty Weight normally includes unusable fuel and full oil (Early 1970s)

Equations Moment=Weight x Arm Center of Gravity = Total Moment Total Weight

The Table CG=Total Moment/Total Weight=_______________ Limitations Forward _________(CG or Mom) Aft ______(CG or Mom)

Two Charts Used to determine moments Table Line Graph READ EVERYTHING ON THE CHART FIRST Figure 35 Table Line Graph

Two Charts Used to determine moments Table Line Graph READ EVERYTHING ON THE CHART FIRST Table Line Graph

SAMPLE 1 Basic Empty Weight (B.E.W.) 2015lbs Moment 155,400 Front 200lbs Back 100lbs Fuel 24gals

AND THE ANSWER IS….. CG=79.75 Total weight 2479 Total moment 197,720

Two Charts Used to determine moments Table Line Graph READ EVERYTHING ON THE CHART FIRST Table Line Graph

Sample 2 B.E.W 1350 lbs Empty Moment 51500 inch-lbs Front 200lbs Back 200lbs Fuel 30 gals Oil 15qts

And the answer is….. Total moment 81800 Total weight 1945 Within limitations…..YES

Forward and Aft Loading