A loadsheet is a preflight document that shows whether an aircraft is loaded safely for departure. It totals the weight of passengers, baggage, cargo, fuel, and the aircraft itself. This matters because an aircraft that is too heavy may not climb, stop, or maneuver as required.
It also matters because the center of gravity must stay within approved limits for stable and controllable flight.
The loadsheet treats each load as both a weight and a location along the aircraft. Weight creates a turning effect called a moment, so a heavy item far from the reference point can shift the balance more than a lighter item nearby. Dispatchers or flight crews compare the calculated total weight and center of gravity with limits in the aircraft manual.
If the result is outside limits, fuel, cargo, bags, or passengers must be adjusted before takeoff.
Understanding Aviation: The Loadsheet
A loadsheet is built from several sources, not from guesses. The aircraft has a recorded basic operating weight, which includes items that normally stay with it, such as seats, galley equipment, crew items, and emergency gear. Passenger numbers come from the boarding record.
Bags and freight are weighed or estimated using approved standard masses. Fuel figures come from the fuel plan and are checked against the actual quantity on board. Every number needs a clear source because a small error repeated across many passengers or bags can become important.
The position of a load matters because an aircraft behaves like a long lever. Freight placed in a forward hold tends to move the balance point forward. Freight in an aft hold moves it rearward.
Passenger seating can have a similar effect, especially on smaller aircraft. The final loading instruction tells ground staff which hold to use and may limit how much can go into each compartment.
It is not enough to know the total baggage mass. Loaders must put it in the planned locations, secure it with nets or restraints, and report any change before the doors close.
Balance affects how the pilots control the aircraft. With a very forward balance point, the tail must produce more downward force to hold the nose up. This can increase drag and may make rotation at takeoff harder.
With a very aft balance point, the aircraft may need less tail force, but it becomes less stable. Small pitch changes can then grow quickly, and recovery from a stall can be harder.
The approved balance range is therefore based on flight testing and certification. It is a real operating boundary, not a convenient target.
Fuel adds another layer because the aircraft changes during flight. Fuel is often stored in wing tanks, though some aircraft use centre or tail tanks. As fuel burns, the balance point can move.
Crews check that it remains acceptable at takeoff, during the flight, and on landing. A flight may depart below a takeoff limit yet still need attention to its landing weight, since brakes, tyres, and structure have landing limits. On some aircraft, a high landing weight requires a different plan, such as holding to burn fuel or using special procedures after an unexpected return.
When learning loadsheets, pay attention to units, signs, and reference points. A moment based on metres cannot be mixed with one based on inches. Some systems use an index value instead of showing the full balance calculation, which makes paperwork quicker but does not remove the physics.
Check whether each entry belongs to the correct compartment and flight stage. Notice the difference between planned fuel and actual fuel.
Modern dispatch software can calculate quickly, but people still verify the inputs. Safe loading depends on accurate information, careful communication, and following the final load instruction exactly.
Key Facts
- Total weight = aircraft basic weight + passengers + baggage + cargo + fuel
- Moment = weight x arm
- Center of gravity position = total moment / total weight
- Takeoff weight must be less than or equal to maximum takeoff weight, or TOW <= MTOW
- Zero fuel weight = aircraft basic weight + payload
- Safe loading requires both weight within limits and CG within the approved forward and aft limits
Vocabulary
- Loadsheet
- A loadsheet is a preflight record that summarizes aircraft weight, load distribution, fuel, and center of gravity for a flight.
- Center of gravity
- The center of gravity is the balance point where the aircraft's total weight can be considered to act.
- Arm
- The arm is the distance from a chosen reference point to the location of a weight on the aircraft.
- Moment
- A moment is the turning effect produced by a weight acting at a distance from a reference point.
- Payload
- Payload is the useful load carried by the aircraft, such as passengers, baggage, mail, and cargo.
Common Mistakes to Avoid
- Adding only the weights and ignoring their positions is wrong because balance depends on both weight and arm.
- Using takeoff fuel instead of planned fuel at the correct stage is wrong because aircraft weight changes as fuel is burned.
- Assuming a load is safe because total weight is under the limit is wrong because the center of gravity can still be too far forward or aft.
- Mixing units such as kilograms, pounds, meters, and inches without converting is wrong because it gives incorrect moments and CG values.
Practice Questions
- 1 An aircraft has a basic weight of 28000 kg, passengers total 6200 kg, baggage and cargo total 1900 kg, and fuel is 5200 kg. What is the takeoff weight, and is it below an MTOW of 43000 kg?
- 2 Three loads are placed at arms measured from the datum: 500 kg at 8 m, 300 kg at 12 m, and 200 kg at 16 m. Find the total moment and the center of gravity position.
- 3 A loadsheet calculation shows the aircraft is below maximum takeoff weight but the CG is slightly aft of the approved limit. Explain one practical change that could bring the CG back into limits and why it works.