XBOX: Takeoff Performance

[alanfernandes]

Hi.

Do these speeds take into account the runway length and other variables to ensure a safe takeoff with all necessary margins?

If not, how can I make this calculation?

Tks.

Alan / From Brazil.

[Mark]

The speed flipchart in the F28 does not take into account runway length. The V speeds are calculated based on the aircraft's weight.

At the moment we don't have any takeoff/landing performance calculator in our aircraft, however, this is something we often get requests for. It is not something we are currently working on, but it is high on our internal feature request list for future updates.

Mark - Just Flight

[AlexEtz]

@alanfernandes Merry late christmas 🎅🏻

[alanfernandes]

@AlexEtz I also have the manual, and according to it, there are no tools to calculate speeds based on other variables.

[AlexEtz]

Oh yes, you right. I missunderstood your question, I thought you were looking for runway landing lenght calculation table.

Unfortunatly I didn't find any speed charts on the web. What I usually do is to calculate on what the interactive speed chart in the cockpit gives me:

If the speed chart is showing you VREF 130kts for Flaps 42 config with LAW 33.0T (as it is usually showing you the current weight and not the calculated LAW), if I want to calculate a VREF for 28T:
130 x 28 = 3640
3640/33 = 110.3030303
it should give you a VREF speed around 110 kts for 28T in Flaps 42 config

Then of course you will have to add all extras speed regarding altitude and wind conditions