Table of Contents
How should the 500 pound weight be shifted Figure 60?
(Refer to Figure 60.) How should the 500-pound weight be shifted to balance the plank on the fulcrum? 1 inch to the left. (Refer to figure 61.).
What is the weight shift formula?
Weight Shift Instead of calculating a weight and moment for every section of the aircraft, it is only necessary to compute the original weight and moment—then, the effect of the change in weight. This is solved easily by cross-multiplying: 50 x 100 ÷ 8,600 = . 06 inches. Therefore, the CG shifts .
How do you balance the weight of a fulcrum?
If you place the exact center point of the beam over the fulcrum, the beam should be balanced.To solve this problem: Determine the moment of each object (Moment = Weight X Arm) Add all the weights. Add all the moments. Divide the total moment by the total weight to find the CG.
What is moment in weight and balance?
Moment—the product of the weight of an item multiplied by its arm. Moments are expressed in pound-inches (in-lb). Total moment is the weight of the airplane multiplied by the distance between the datum and the CG.
How is weight and balance calculated?
Multiply each weight by the arm—the distance from the reference datum—to find the moment. Add all the weights to find the gross weight. Add all the moments to find the total moment. Divide the total moment by the gross weight to find the center of gravity.
How much does 8 quarts of aviation oil weigh?
Baggage 200 lb. Airplane B 1,200 pounds empty weight 8 quarts of oil (7.5 lb.
How much weight must be shifted from station 150.0 to station 30.0 to move the CG to exactly the aft CG limit?
How much weight must be shifted from Station 150.0 to Station 30.0 to move the CG to exactly the aft CG limit? a. 68.9 pounds.
What is the maximum amount of fuel that may be aboard the airplane on takeoff if loaded as follows?
What is the maximum amount of fuel that may be aboard the airplane on takeoff if loaded as follows? 74.9 pound-inches.
What is the lift formula?
The lift equation states that lift L is equal to the lift coefficient Cl times the density r times half of the velocity V squared times the wing area A. For given air conditions, shape, and inclination of the object, we have to determine a value for Cl to determine the lift.
How do you calculate CG of an aircraft?
Center of gravity (CG) is calculated as follows: Determine the weights and arms of all mass within the aircraft. Multiply weights by arms for all mass to calculate moments. Add the moments of all mass together. Divide the total moment by the total mass of the aircraft to give an overall arm.
What items should be added to the basic empty weight when calculating weight and balance?
Terms in this set (18) The performance tables of an aircraft for takeoff and climb are based on. When computing weight and balance , the basic empty weight includes the weight of the airframe, engine(s), and all installed optional equipment.
How do you balance unequal weights?
In order to balance, the lighter weight (less mass) must be farther from the fulcrum. It is, instead “double the weight halve the distance”.
How do you calculate weight from distance?
The equation “F = m_g = weight” will be used to determine a hanging load’s weight.
How much weight does it take to balance the lever?
This law states that a lever is balanced when the weight on one side of the fulcrum (a pivot point for the lever) multiplied by its arm is equal to the weight on the opposite side multiplied by its arm. In other words, the lever is balanced when the sum of the moments about the fulcrum is zero.
What will happen if CG is too far aft?
If the CG is too far aft, it will be too near the center of lift and the airplane will be unstable, and difficult to recover from a stall. At slow takeoff speeds, the elevator might not produce enough nose up force to rotate and on landing there may not be enough elevator force to flare the airplane.
What is Max weight?
The maximum weight is the maximum authorized weight of the aircraft and its contents, and is indicated in the Aircraft Specifications or Type Certificate Data Sheet. For many aircraft, there are variations to the maximum allowable weight, depending on the purpose and conditions under which the aircraft is to be flown.
What is a weight moment?
A moment is the product of a weight multiplied by its arm. The moment for a piece of equipment is in fact a torque value, measured in units of inch-pounds (in-lb). To obtain the moment of an item with respect to the datum, multiply the weight of the item by its horizontal distance from the datum.
Why weight and balance is important?
Weight and Balance Form Proper distribution of weight plays a large and important role in an aircraft’s overall performance. Load your airplane improperly, and it will affect its fuel consumption, speed, rate of climb, controllability, ceiling, and even structural integrity.
When computing weight and balance the basic empty weight includes the weight of the airframe?
Empty weight of an airplane includes the airframe and powerplant, unusable fuel, hydraulic fluid, and undrainable oil, or in some aircraft, all of the oil. Useful load consists of the pilot, passengers, usable fuel, oil and baggage. Fuel weighs 6 lbs per gallon, and oil weighs 75 lbs/gal.
What is the arm in weight and balance?
Arm. The arm is the horizontal distance from the reference datum to the center of gravity (CG) of an item.
