1. Identify the exact aircraft variant
Select the simulator profile that matches the aircraft: A220-100, A220-300, A319-132, A320-214, A320-251N, A321-211, A330-243 or A330-343. Engine and airframe variants should not be treated as interchangeable.
2. Enter takeoff weight and CG
Use takeoff gross weight, not zero-fuel weight or maximum takeoff weight. Confirm kilograms versus pounds. Enter the CG value shown by the simulator load manager, EFB or flight-planning tool.
Weight establishes the main speed baseline, while CG influences rotation and takeoff trim.
3. Configure the aircraft
Select the planned flap configuration and match packs and anti-ice to the actual departure setup. These choices affect thrust demand or the modelled speed and FLEX corrections.
4. Load the departure runway
Search for the airport ICAO, choose the correct runway direction and confirm length, elevation and slope. Enter takeoff shift if departing from an intersection. Effective runway length equals physical runway length minus that shift.
Select the expected surface condition instead of assuming dry runway.
5. Add weather
Load METAR data or enter OAT, QNH, wind direction and wind speed manually. Verify that the report is current and appropriate for the departure time. The tool calculates pressure altitude and runway-relative wind components.
6. Review and enter the result
Check warnings before copying V1, VR and V2 into the MCDU. Confirm that V1 < VR < V2 and review FLEX, flap/THS and retraction speeds. If the simulator rejects a value, recheck aircraft variant, units and input data rather than changing the speed arbitrarily.
Repeat the calculation after any change to runway, weather, weight or configuration. These estimates are for simulation only.