Re: [Flightgear-devel] RFD: FlightGear and the changing state of air navigation

[David M. <dav...@gm...>]

Thanks, everyone, for the responses.

Torsten: yes, DME arc transitions still exist, and I enjoy flying them both
in FlightGear and in real life. There are two important differences for the
radial-to-fix transitions (as I understand so far, still studying up the
new-to-me RNAV procedures):

   1. You can fly them around any fix, not just a DME/TACAN (typically
   colocated with a VOR). Granted, you could do that in FlightGear now simply
   by using the GPS distance, but ...
   2. The CDI actually gives you (and the autopilot) guidance for where you
   should be flying, so you're not manually estimating your course based on
   the DME/GPS distance while flying 90° to the navaid bearing.

It's the second one that will trip us up for using FlightGear as a way to
practice modern IFR procedures.


Cheers, David

On Mon, 3 Jul 2017 at 06:23 Torsten Dreyer <to...@t3...> wrote:

>
>> One example of an RF-style approach is
>> https://bruceair.files.wordpress.com/2012/07/image.png; please also read
>> this:
>> https://bruceair.wordpress.com/tag/radius-to-fix/.
>>
>> This style of RNAV approach is becoming more and more common, and
>> FlightGear cannot yet simuolate it.
>>
> In the old fashioned  world of non-glass-no-gps-cockpits, this used to be
> called a DME-ARC. Much fun to practice and perfectly flyable inside
> FlightGear :-)
>
> --
>
> Torsten Dreyer
>
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