Table of Contents

## What is weight and balance sheet?

A sheet which records the distribution of weight in an aircraft and shows the center of gravity of an aircraft at takeoff and landing.

**How do you measure arm weight and balance?**

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 do you find the empty weight of a CG?

Subtract the weight of the chocks, called tare weight, from the scale reading to determine the net weight at each weighing point. Multiply each net weight by its arm to determine its moment, and then determine the total weight and total moment. The CG is determined by dividing the total moment by the total weight.

**Is weight and balance required?**

14 CFR part 125 requires aircraft with 20 or more seats or maximum payload capacity of 6,000 pounds or more to be weighed every 36 calendar months. Multi-engine aircraft operated under 14 CFR part 135 are also required to be weighed every 36 months.

#### Why is weight and balance so 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.

**What is standard empty weight?**

Standard empty weight (GAMA)—aircraft weight that consists of the airframe, engines, and all items of operating equipment that have fixed locations and are permanently installed in the aircraft, including fixed ballast, hydraulic fluid, unusable fuel, and full engine oil.

## How do you weight and balance a Cessna 172?

2 Answers

- 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 weight of the aircraft to give an overall arm.

**What are the things seen in weight and balance records?**

When a technician gets involved with the weight and balance of an aircraft, it almost always involves a calculation of the aircraft’s empty weight and empty weight center of gravity.

### How do you calculate moment weight and balance?

- Step 1: Find Your Aircraft’s Empty Weight and Moment. Each aircraft’s weight and moment are different.
- Step 2: Find Weights of Everything Loaded.
- Step 3: Calculate the Moment for the Load.
- Step 4: Total Up the Weights and the Moments.
- Step 5: Determine If Center of Gravity Is Within Limits.
- 6 Comments.

**Who are the responsible for maintaining of weight and balance record current?**

Amateur-built aircraft must have this information determined and available at the time of certification. The FAA-certificated mechanic or repairman who maintains the aircraft keeps the weight and balance records current, recording any changes that have been made because of repairs or alterations.

#### Why weight and balance is important?

**How is balance with weight measured?**

Mass by Difference or Subtraction

- Zero the scale or press the tare button. The balance should read “0”.
- Measure the mass of the sample and container.
- Dispense the sample into your solution.
- Measure the mass of the container.
- If you repeat the process and use the same container, do not assume its mass is the same!

## What is the difference between basic empty weight and licensed empty weight?

Standard empty weight is the empty weight plus unusable fuel. When optional equipment is added to the standard empty weight, the result is licensed empty weight. Licensed empty weight, therefore, includes the standard airplane, optional equipment, full hydraulic fluid, unusable fuel, and undrainable oil.

**What is the basic empty weight of a Cessna 172?**

1,680 lb.

Basic Empty Weight: 1,680 lb. Useful Load: 878 lb. Full Fuel Payload: 560 lb.

### What is CG Why is it important when performing aircraft weight and balance calculations?

An airplane’s balance, where its center of gravity (CG) is located, is, perhaps, even more critical to the safety of flight because the CG’s location affects the airplane’s stability.