A320 ND route calculations

[thmUNIX]

Hello! I am planning on building a DIY A320 home cockpit and currently I'm thinking of
implementing EFIS (I don't want to use any existing parts from sim hardware vendors,
I'd like to build and code everything by myself. Will develop plugins for X-Plane etc)

So here's the question. Which types of shapes is ND capable of drawing between
waypoints? I mean, if we have a simple part of the flight plan, seems like we have to
use Great Circle formula (or we can omit the fact that the Earth is not flat for the ND
range?). In which cases there can be some circles or arcs around the waypoints?
Sometimes I see quite a rough bevel between two legs of the flight plan and sometimes
it's more of a circular turn around the waypoint (sometimes not even intersecting it).

Thank you in advance!

[VariablePitchP]

Originally Posted by thmUNIX

Hello! I am planning on building a DIY A320 home cockpit and currently I'm thinking of
implementing EFIS (I don't want to use any existing parts from sim hardware vendors,
I'd like to build and code everything by myself. Will develop plugins for X-Plane etc)

So here's the question. Which types of shapes is ND capable of drawing between
waypoints? I mean, if we have a simple part of the flight plan, seems like we have to
use Great Circle formula (or we can omit the fact that the Earth is not flat for the ND
range?). In which cases there can be some circles or arcs around the waypoints?
Sometimes I see quite a rough bevel between two legs of the flight plan and sometimes
it's more of a circular turn around the waypoint (sometimes not even intersecting it).

Thank you in advance!

It just joins them together, the max range is only 320 miles in ARC mode, if it does draw great circle lines they’re indistinguishable from straight lines.

Waypoints generally aren’t ‘flyover’, so the plane will cut the corner, as it can’t turn on a pinpoint. If you tell it a waypoint is a flyover then it’ll fly over it, but you’d then kick out a few miles past the turn and have to correct back onto the track.

In the extreme example, if it’s a super complicated set of waypoints close together it’ll just blast straight through the middle as you’re always limited by turn radius.

Sorry but just expand on what you’re doing. You want an 320 cockpit sim but rather than download ‘A320 sim’ which has had years of development and thousands of hours, you want to design an entire flight model yourself? Same for building the hardware? It’d be 3025 before you are finished.

[thmUNIX]

Got it, thanks!

Originally Posted by VariablePitchP

Sorry but just expand on what you’re doing. You want an 320 cockpit sim but rather than download ‘A320 sim’ which has had years of development and thousands of hours, you want to design an entire flight model yourself? Same for building the hardware? Until be 3025 before you are finished.

Of course I am using an already developed aircraft model for X-Plane (ToLiss A320neo). I only want to build the hardware part by myself (using Arduino, RPi etc) and develop some software to connect with X-Plane

[arf23]

perhaps peek at https://winwingsim.com/ as their prices are silly for top kit, Chinese natch