Weight & balance.
Every load has a moment. See where yours takes the CG.
Choose your flight
SELECT A FLIGHT TO VIEW ITS AIRCRAFT
NO AIRCRAFT SELECTED
REGISTRATION FOLLOWS YOUR FLIGHT SELECTION
IMAGE FROM THE GENSAN AIR FLEET DATABASEA319, A320 and ATR 72-600 physical sectors only. Registration follows the selected flight; no equipment substitution is made.
Passenger seat map
Seat positions match the saved map or Gensan Air’s current booking-layout generator. Generated maps are labeled and are not physically verified. Click seats to create a simulated passenger load; this does not read or change passenger bookings. Cabin longitudinal zones and moment arms remain teaching assumptions.
Balance the cabin
Load the holds
Cargo for this flight
Choose a flight to load its processed cargo.
From ramp to landing
ROUTE ESTIMATE / ADJUST ASSUMPTIONS
Still-air educational estimate, using great-circle distance × route factor / speed, plus a phase allowance. Includes illustrative contingency, reserve and alternate allowances. No winds, altitude, payload, MEL, actual alternate or regulatory compliance calculation.
Choose a flight
Reference image from the Gensan Air fleet database. Each type loads its own illustrative balance and fuel assumptions.
Aircraft reference data
These are teaching values, not certified aircraft data. DOW includes crew, catering and operating items; avoid counting them again. All arms share the same arbitrary example datum.
Stations and capacities
Weight-dependent CG limits
Linear interpolation between rows. No extrapolation. This same teaching envelope is used for every phase; certified phase-specific envelopes and operational curtailments are not represented.
Weight × arm = moment
The arm is the longitudinal distance from a common reference datum. Moving a load aft increases its moment, shifting the center of gravity aft.
CG %MAC = 100 × (CG arm − LEMAC) / MAC
- Zero fuel: DOW + passengers + checked baggage / cargo.
- Ramp: zero fuel weight + block fuel.
- Takeoff: ramp weight − taxi fuel.
- Landing: takeoff weight − trip fuel.
Each fuel addition or removal also changes total moment using the entered fixed fuel arm. All weights use kilograms; arms use meters; moments use kg·m. Display rounding does not affect calculations.
What the model checks
Example structural weight limits, zone and hold capacities, fuel arithmetic, and CG positions against your illustrative envelope at four discrete points. The connecting line is a visual guide, not a continuous fuel-burn envelope check.
Route-based fuel estimates
The tool uses an editable still-air speed, an hourly consumption assumption and a phase-time allowance to estimate trip fuel. Taxi, contingency, a reserve-time allowance and an alternate-time allowance are added to make block fuel. All assumptions are for simulation. A319 / A320 / A320neo burn rates are illustrative; ATR’s published cruise figures are condition- and engine-specific and are only a reference, not a block-fuel model.
Model boundaries
This tool does not calculate stabilizer trim, certified loading indices, individual seat moments, tank-by-tank fuel moments, lateral balance, floor loading, performance-limited takeoff / landing weights or an operational load sheet. Changing its data does not make it operationally approved.
Primary references
ATR · ATR 72-600 manufacturer factsheet ↗Published nominal cruise performance. Verify engine variant and stated reference conditions; it is not an operational flight plan.
FAA · Weight & Balance Handbook ↗Reference for weight, arm, moment and %MAC arithmetic.
Airbus · Aircraft Characteristics ↗Aircraft planning documents distinguish weight variants; they do not replace the approved aircraft-specific flight manual and weight-and-balance data. No preset arms or CG envelopes in this tool are taken from Airbus or ATR.
FAA · AC 120-27F, Weight and Balance Control ↗Operator weight-and-balance control program guidance.
