Advanced Takeoff

An Advanced Takeoff performance model is comprised of a set of parameters that define the flight characteristics of the aircraft during a takeoff and is mapped to the physical properties of the aircraft that are currently defined in the Advanced Fixed Wing Tool.

Takeoff

Field	Description
Takeoff Speed Mode	Select a mode to calculate the aircraft's airspeed upon leaving the ground. Stall Speed Ratio - a multiple of the aircraft's stall speed. Angle of Attack The angle between the body X axis and the projection of the velocity vector onto the body XZ plane. The velocity vector is the velocity of the object as observed in the object's central body fixed coordinate system. - the speed needed to achieve lift at the specified Angle of Attack.
Stall Speed Ratio	The Stall Speed Ratio upon leaving the ground; this property is calculated if the Speed Mode is set to Angle of Attack or manually defined if it is set to Stall Speed Ratio.
Angle of Attack	The Angle of Attack upon leaving the ground; this property is calculated if the Speed Mode is set to Stall Speed Ratio or manually defined if it is set to Angle of Attack.
Flaps	The extension of the flaps during takeoff.
Departure Speed Mode	The method that will be used to calculate airspeed upon leaving the ground. Select Best Climb Angle or Best Climb Rate to force the aircraft to fly at the best climb angle or climb rate, respectively, and achieve and maintain the airspeed that is a function of that goal. Select Use Climb Perf Model to apply the airspeed defined for the Climb performance model of the current mission phase.
Departure Speed Limit	The aircraft's maximum airspeed upon leaving the ground; select a reference from the drop-down menu - 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.
Use Afterburner A jet engine component that provides an increase in thrust by injecting additional fuel into the jet pipe, downstream of the turbine. An afterburner is usually employed in supersonic flight, certain takeoff scenarios, and in combat situations.	Select this check box to use the engine's afterburner during takeoff, if the powerplant strategy that you selected has one.
Throttle	Select the Override Throttle check box to specify a reduced throttle value during takeoff. If the powerplant strategy that you selected for the aircraft has an afterburner, you should select the Use Afterburner check box if you apply a reduced throttle. This will ensure that your throttle value is applied to the aircraft's true maximum thrust.