A Cruise performance model is the same as the Basic Cruise performance model except that it allows you to specify airspeeds at multiple altitudes - rather than simply defining a ceiling altitude - using the Altitude table. Using the cruise model, you can define airspeed/altitude/fuel-flow combinations that are commonly found in the cruise performance section aircraft operating handbooks. Use the Cruise performance model if you have a set of specific altitude/airspeed/fuel flow combinations for your aircraft.
Right-click an entry in the table and select Insert Before or Insert After to add rows; you cannot insert a row after the last row or before the first row. Select Delete to remove the currently selected row or Delete All Invalids to remove all invalid rows; you cannot remove the first or last rows. To access the cruise model:
- Open aircraft properties.
- Right click on “Cruise.”
- Select new model type. This Cruise model is “AGI Cruise Model”.
| Parameter | Description |
|---|---|
| Default Cruise Altitude | The aircraft's default cruising altitude. You cannot specify an altitude below sea level (0). If a procedure is specified that requires the aircraft to fly below sea level, the performance models in effect at sea level will be applied to that procedure. |
| Use Aero/Propulsion Fuel Flow | Select this check box to use the fuel flow calculated by the aerodynamics and propulsion strategies defined in the active acceleration performance model; if the acceleration performance model is not set to calculate fuel flow, then fuel flow will not be calculated for this performance model, either. |
| Scale Fuel Flow by Non Std Density | Select this check box to scale the fuel flow based on the aircraft's actual altitude. If this option is disabled, the fuel flow will be calculated at the Default Cruise Altitude (if available), or at sea level. |
| Altitude | Displays the altitude point that is currently selected in the table. |
| Airspeed Type | The airspeed reference of the performance model - true airspeed (TAS True Airspeed: the speed that the aircraft is moving relative to the airmass that it is flying in.), calibrated airspeed (CAS Calibrated Airspeed: the speed reported by the airspeed indicator, corrected for position and instrument error.), equivalent airspeed (EAS Equivalent Airspeed: the airspeed at sea level (International Standard Atmosphere) at which the dynamic pressure is equal to the dynamic pressure at the aircraft's current true airspeed and altitude.), or Mach The ratio of the aircraft's speed and the speed of sound at the aircraft's altitude, with local atmospheric conditions. number. |
| Minimum | The minimum cruising airspeed and fuel flow. |
| Max Endurance | The cruising airspeed and fuel flow that will provided the maximum flying time possible for the aircraft. |
| Maximum | The maximum cruising airspeed and fuel flow. |
| Max Range | The cruising airspeed and fuel flow that will provided the maximum flight range possible for the aircraft. |
| Max Performance | A custom performance airspeed and fuel flow that you can use to model specific flight conditions. The values must be between the Minimum and Maximum parameters. |
The Basic Point to Point procedure ignores the Max Perf fuel flow when constructing its profile. For more information, see the Basic Point to Point help page.