Weighty Words
Theoretical point at which the entire weight of the aircraft is assumed to be concentrated.
Center of gravity (CG)
Weight x Arm = _________
Moment
Center of Lift is also known as _______________.
Center of Pressure
TRUE of FALSE: When weight is shifted on an aircraft, the total moment and the CG location will change.
True
The distance from the datum to the applied force.
Arm
Total Moment / Total Weight = ____________
Center of gravity (CG)
TRUE or FALSE: To maintain balance, the CG is located slightly behind the center of lift.
False
TRUE or FALSE: The addition or removal of weight will not change the CG.
False.
Arbitrary point chosen by the manufacturer from which all measurements of arm are taken.
Datum
An item located -55 inches would be located 55 inches ________ of datum.
Forward
TRUE or FALSE: The arm is positive if it is measured aft of the datum.
True
If a Cessna 172 is under max takeoff weight but the CG is slightly aft of CG range, the pilot can legally takeoff if __________.
Shifting the weight brings CG within acceptable range.
The product of the weight of an item multiplied by its arm.
Moment
The location of Station -67 inches + 67 inches
Station 0 or the datum
TRUE or FALSE: When weight is shifted forward, the total moment increases.
False
Item A is loaded on an aircraft. The moment is 5000 lb-in. and the arm is 50 inches. What is the weight?
100 lb.
A location in the airplane identified by its arm.
Station
Weight Shifted / Total Weight = Change in CG / _____
Distance Weight is Shifted
The weight of aviation fuel is __________.
6 lbs. per gallon
When attempting to fly an aircraft with a CG aft of the acceptable range, it will stall at a _________ airspeed.
Lower