Adjust CDI Bar with GPS as nav source

[Wal_Thompson]

Hi guys,

my sole navigation source is the Dynon GPS. When navigating to a GPS waypoint or destination, is it possible to adjust the CDI bar to a specific inbound course?

For example, if I wanted to track inbound to a destination on the 090 track, could I "direct to" that destination and then adjust the CDI bar to 090?

 

[preid]

That's called Virtual VOR and many have asked for it in the past.
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1352917130/27#27

Hopefully we'll see it added in 2013!

 

[Wal_Thompson]

Hi reidvaitor,

I don't think I'm asking for virtual VOR. I'm trying to adjust the CDI bar to set a specific inbound course to my currently selected GPS destination/waypoint.

This is probably something the Skyview system can already do, but I've only just installed it and am trying to figure out how it works!

 

[Edwardoc]

I believe you have to program a route: "(Page 4-21 of the manual states:  The course indicator has an arrow at its end which points to the currently selected course. When a GPS source is selected, course direction is normally set implicitly by the programmed route.)"    If Direct is selected to a point, the Course indicator indicates how far off the direct course you are in miles from a direct route if you drift or turn from the direct course. I don't believe you can select a fix in GPS, dial in a course in the course selector and have it show your a course deviation as if it were a OBS.  That is what the Virtual VOR would provide. I could be wrong as I have only used the GPS to go direct or to follow a flight plan route.  I have a VOR/ILS for course navigation when required.

 

[dynonsupport]

As has been mentioned, the feature that would allow you to pick a GPS point and then a specific course into it is in fact Virtual VOR, sometimes called Pseudo VOR or even GVOR (GPS VOR).

It's on our list of features to develop, but it is not in the SkyView software today.

 

[trevpond]

Hi Guys;

Not there yet, but we live in hopes that it will be shortly - it's so useful, particularly if the viz goes bad.

regards


Trev

 

[Wal_Thompson]

reidvaitor my apologies, I'm new to this and misunderstood the thread you linked. Good to know that Dynon has it on the to do list, as it would provide what I am used to on physical HSIs - a manually adjustable CDI bar with a bearing needle. Thanks all for your advice.

 

[dynonsupport]

While Virtual VOR can be handy for sure, there are a lot of other ways on a GPS to approach a point from a specific direction. You can use fixes or even the cursor to define a second point away from your destination point that will set up a GPS course on the line that you want. We'll get there, but there are work-arounds for now.

Just so you know, you don't need this to fly GPS. The beauty of GPS is that you can define arbitrarily complex flight paths with any points you want, not just in/out of fixed points on user defined radials. In fact, IFR approaches and en-route procedures don't use Virtual VOR, so it's not a requirement for an aircraft to fly in the IFR system even if all they have on board is a (certified) GPS.

 

[trevpond]

I hear what you say about using GPS course lines, but some of us like VOR's, and the really useful thing about Virtual VOR is that you can put one on the end (both ends) of the runway or strip, get on the virtual radial and fly straight on down in using the CDI.

So, I and a lot of other flyers want to see Virtual VOR as soon as you chaps can do it.

regards



Trev

 

[preid]

Dynon usually looks at the demand for something to determine where it fits on the future list. I think there is a demand for this from many of the current users. It's no secret I agree with Trev, I could use a simple solution of turning a dial on the spot versus needing to think and plan the alternative moving the cursor or other ways.. I also know this is a great added value in lieu of having to equipt my plane with a nav radio, so think about how that would sell for Dynon.. It's a win win situation  ;D
Regardless, great support, and product
Thx

 

[dynonsupport]

Trev,
If that's what you are looking for then it sounds like you want a virtual approach, not virtual VOR. Hardly any airport has the center of the airport defined as on a runway, and can in fact be miles off to one side. The more runways an airport has, the worse it gets.

What you're saying you want is to ask SkyView for an approach to runway 13L and have it build a course line out of that, using the runway data, not the airport data.

The whole reason I bring this up is to see why people want Virtual VOR. Is it for enroute operations or terminal operations? These are likely different features that we need to prioritize.

 

[trevpond]

Hi,

You nailed it, that's exactly what a lot of us did with a Blue **** unit. By so doing, you were able to intercept your virtual radial and then use it for an approach. The GPS gives you your distance.

best regards


Trev ;D

 

[Wal_Thompson]

From my perspective I would like the true 'Virtual VOR' capability for terminal / approach ops. That way I can use the VOR approach plate and be sure I am tracking the ground track intended by flying the approach to the VOR navaid, as opposed to the aerodrome reference point.
And I'm aware that flying a VOR approach using a GPS would be illegal, and that DME distances would probably be inaccurate due slant range/co-location issues, but it would be an emergency procedure for me - I have no other navaids.

Cheers guys, and happy flying

 

[preid]

Where I am in Southern California the airspace is busy, I am constantly told to turn to different headings for traffic and airspace, I could realign on a flight plan but it is usually better to press direct to and follow that except when there is airspace(usually military) limitations, in that case a victor airway is the way to go, which is a different way than planned. no way to tag a mid point with GPS so one fiddles. With virtual VOR one can find the heading needed and intercept, same thing when I fly a RNAV (as a FP with the end point a user waypoint on the runway threshold) in marginal VFR due to fog, while others call asking for airport direction I fly to my first point on the FP and intercept that, having a virtual VOR would do this so easily for me no matter where I was, as I do so without being able to see 1 mile ahead of me. It works much easier than doing everything staring at a map and waiting to turn it works, but there are times it's safer to turn a dial and continue on my merry way. And it's all legal!
So both enroute and approaches for me.

 

[Wal_Thompson]

Good morning Dynon,

is there any intention to add virtual VOR functionality in the future?

Cheers,

Wal

 

[swatson999]

Hi guys,

my sole navigation source is the Dynon GPS. When navigating to a GPS waypoint or destination, is it possible to adjust the CDI bar to a specific inbound course?

For example, if I wanted to track inbound to a destination on the 090 track, could I "direct to" that destination and then adjust the CDI bar to 090?

Is the OP asking for the same functionality that, say, the 430 provides (Direct To something, then press CDI and use the OBS to change the course To the waypoint, then press CDI again to go back into GPS course guidance)?

Because it *sure* is handy a lot times with the 430W...

 

[Wal_Thompson]

Yep, looking to decouple the CDI bar and the GPS1 needle, so I can observe current radial while intercepting an inbound/outbound track on the CDI bar.

 

[Dynon]

This feature request is definitely on the list to do (search "virtual VOR" here on the forum for past chatter about it), but it's not scheduled into a particular software version at this point.

 

[jabb]

Hi everybody!
It is not necessary to talk 'virtual VOR' about. We should talk about implementation of ARINC Path Termination in general.

Take in account what is required by Aviation Authorities worldwide : "Pilots must be aware of their individual systems Path/Terminator handling characteristics and always review the manufacturer’s documentation to familiarize themselves with the capabilities of the RNAV equipment they are operating."

Where, in manufacturer's documentation, can I find information required? 'Virtual VOR' capability doesn't means anything else but "course to fix" path terminator is implemented. This capability is build in for sure, what we are looking is availability to preset CRS manually.

I am sorry for my English. I hope You can understand, what I am talking about.