When you send the trip manifest, FlightSpan™ will automatically switch to the TakeOff Perf tab.
The takeoff performance page is separated into three sections – the header, the runway, and the parameters.
Header
In the header section you can
- Change the takeoff flap setting if more than one setting is approved for your aircraft type (the button will be grayed out if only one option is available)
- Change the runway if more than one runway is available for takeoff (the button will be grayed out if only one option is available)
- See the calculated Vr for your computed takeoff weight
- View the projected takeoff roll
- See whether or not the estimated takeoff roll provides provides accelerate-stop distance
- See your W&B envelope and whether a non-standard liftoff requirement exists
If the estimated takeoff roll exceeds the maximum amount of runway your company allows for takeoff, the estimated takeoff roll number will turn red.
Runway
FlightSpan™ defaults to the most advantageous runway for takeoff considering company weight restrictions, slope, length, and surface; in this case Runway 36. Takeoff will always display left to right regardless of runway orientation.
Paved runways will display dark gray; gravel runways light gray, grass runways green, and water runways blue.
Runway edge markings are spaced either 50 meters or 100 feet apart, depending on your default length units.
Tap the airport identifier to change departure airports.
The estimated liftoff point is marked by a green line across the runway, and a white triangle along the top of the runway, with the expected liftoff point and percentage of runway. The estimated takeoff roll distance is calculated by adding the distance required for turnaround (set in Aircraft Type EFB Settings) to the calculated takeoff roll.
An optional performance checkpoint as a percentage of Vr can be displayed with a green triangle. The default is 75% of Vr at 50% of the takeoff roll.
The performance checkpoint can be enabled by setting the Aircraft Type EFB Preference Show Rotation Speeds For Takeoff to Yes, and the default percentage of Vr can be changed with the 50% Takeoff Roll Marker: Display This Percentage Of Rotation Speed Preference.
FlightSpan™ does calculations in the background to determine a projected abort point that allows you to stop on the runway with a 20% margin built in. If the calculations determine that you cannot accelerate to liftoff speed and get stopped on the runway with margin, that point will be marked with a red triangle. The abort point distance is noted in the “No Ability to Stop” warning (in this case, 187 meters).
If accelerate-stop is available, the calculated stopping point for an abort initiated at liftoff speed will be displayed. The latest point at which you can abort and stop on the remaining runway with a margin of 20% of the accelerate-stop distance will also be displayed. In the example below, the calculated stopping distance at the gross takeoff weight is 323 meters, so the estimated stop point is marked at 652 meters.
The latest abort point is marked at 399 meters (323 meters plus 20% of the 640 meter accelerate-stop distance, or 451 meters from the end of the runway).
Note: The latest abort point marker will not be displayed if the latest abort is beyond the 50% mark of the runway, since on longer runways this information has little value.
Redline on the runway is the latest liftoff point allowed for the runway based on the value set in FlightSpan™ Ops. It may be defined by a percentage of the runway (e.g. 75%) or for specific runways it may be changed due to climb requirements or other factors. If it is different from the standard distance, there will be a note under the takeoff envelope.
The standard redline is set using the Aircraft EFB Preference Takeoff Max Runway Usable (%).
Runway specific redlines are set in the runway’s “Available” setting under Takeoff Restrictions.
- If no available length is set then Takeoff Max Runway Usable is used for the redline.
- If a runway has available length set to less than Takeoff Max Runway Usable, then the shorter length is used for the redline.
The Company EFB Preference Limit Takeoff Available Runway Length To Max Runway Usable Setting can be set to “Yes” or “No”.
When set to the default of “Yes”
- If a runway has available length set to more than the Takeoff Max Runway Usable, then the greater length is ignored and Takeoff Max Runway Usable is used for the redline. There will also be a notation that there is an obstacle clearance point defined after the redline.
When set to “No”:
- If a runway has available length set to more than the Takeoff Max Runway Usable, then the greater length is used for the redline.
If there is a company runway takeoff weight limit, it will be displayed on the left, along with a yellow line on the CG envelope. Current weight and CG are also displayed near the envelope.
