Info for flying vor dme arc to a localizer.

[jraddison]

Using a Garmin 650 (the future is here now!) to pull up approaches, anyairport USA, and feed them to the Dynon Skyview while displaying the approach plate from the Dynon nav information on the stick.
If say, doing an approach into KRDM runway 22, there is an arc off the vor, to intercept the loc. The Dynon knows where the vor (DSD) is, the radial from, and the dme to DSD, which is needed to fly the arc.
If the Dynon could be selected to show either pointer needle (of both for me to avoid confusion) and the dme next to the letters DSD, it would provide for a nice transition from arc to localizer and not have to change anything for the intercept. The Garmin is feeding the HSI ILS information and the dme for the localizer which is displayed in a box. That part should remain the same.
Lower down a needle symbol followed by ID of nav aid and dme from that nav aid, is what would be terrific.

Jack Addison
Lancair 360, Mark II
jraddison@msn.com

 

[dynonsupport]

Jack,
Welcome to the forum!

There's a few options in your aircraft for you already. I've got a 650 in my own plane so I'm pretty familiar with this.

The first is that the 650 is a whole IFR navigator and will do what you want all by itself. You can load the LOC/DME approach to runway 22 into KRDM into the 650, and it will do a GPS overlay of the DME approach. This will first ask you your entry point, then use the GPS to take you to that, and fly the DME arc, all while giving you a GPS based HSI needle to fly. The full path of this will show up on the Dynon map as well. When you do intercept the LOC, the 650 will automatically switch the Dynon HSI to VLOC mode. No button pushing needed. Now you're on the actual LOC data just like you should be. You can tell if you are on GPS or LOC by the color of the HSI, where magenta=GPS and green=LOC, so the switch is obvious.

If you have the Dynon autopilot it will also fly all of this automatically.

The awesome thing about this is it's perfectly legal, since the 650's GPS is a legal replacement for a DME and for terminal procedures. A TSO'd GPS is also a legal replacement for identifying the distance from the runway as a replacement for the markers.

The other option is to use the GPS unction in SkyView. If you do a Direct-To (DTO) to DSD in the GPS, then you can set this up as a bearing pointer in SkyView, and keep the LOC as the primary HSI needle. This will show a DME to the VOR by the bearing pointer (if you have software 12.0 or later).

The issue here is that even an experimental, a GPS must meet the requirements of the 800 page TSO in order to be used for primary navigation in IFR. Because of this, it isn't technically legal in the USA to use the Dynon mapping for any navigation, and thus using this DME data in IFR navigation is not legal.

Overall, I think the system already does exactly what you want in a few ways. Learn a bit more about the 650, play with the SkyView some, and let us know if we can help more.