WTF am I doing wrong? Different VOR distances...
Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=752
Printed Date: 20 Apr 2024 at 3:43am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: WTF am I doing wrong? Different VOR distances...
Posted By: jzawodn
Subject: WTF am I doing wrong? Different VOR distances...
Date Posted: 23 Jul 2015 at 3:19pm
|
Took this snapshot today in flight after being completely confused about what the IFD540 was trying to tell me. I wanted to answer the question "how far from the Manteca VOR (ECA) are we?" Asking the GPS (using "Direct To" provided one answer, while tuning it in on the NAV side provided a second answer. It turns out that the NAV side was right. What the heck did I do wrong to end up in a state with it showing me conflicting information for the thing? I assume I'm not understanding what the purple values in the upper right mean (since they were "wrong") while I do understand the white text in the left hand column. Can someone enlighten me? In case this embed doesn't work, here's a link to the image: http://dl.dropboxusercontent.com/u/6763272/2015-07-23%2010.40.32.jpg" rel="nofollow - https://dl.dropboxusercontent.com/u/6763272/2015-07-23%2010.40.32.jpg  |
Replies:
Posted By: AviJake
Date Posted: 23 Jul 2015 at 3:47pm
|
Yup, operating per design. You commanded a Direct-To at the beginning of that depicted magenta line that has the button hook to ECA but then you immediately did something different from what you told the FMS you were going to do. That magenta datablock shows along track distance remaining. So it shows the distance that the painted magenta line represents. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: mkellock
Date Posted: 23 Jul 2015 at 3:48pm
|
Could it be that when you entered Direct ECA the 540 assumed you actually wanted to go direct to ECA so the distance you are seeing is from the point of submission? The other is actually correct because that is where you actually are located relative to the VOR. It makes sense to me as you are around 7.5 nm from where you entered direct to ECA, so the math seems relatively close. ------------- Piper Archer II PA28-181 Tampa, FL |
Posted By: jzawodn
Date Posted: 23 Jul 2015 at 3:53pm
Huh, ok. Interesting (and somewhat surprising). Then what *should* I have done w/out having to tune the VOR to get my distance from it and have that distance update as I fly along? Since I did it the wrong way, I'm asking for a right way. :-) Thanks, Jeremy
|
AviJake wrote:Posted By: n7ifr
Date Posted: 23 Jul 2015 at 5:10pm
|
Set your "data blocks" on right side for: 1. "To Wpt" to ECA VOR 2. "Next Wpt" So that way, the "To Wpt" to ECA VOR (assuming that is your current active Wpt) is a direct distance and I would expect this should be identical to the VOR radial distance. BTW, on your photo, I don't see a Magenta FP line, so I guess you are flying something "off" FP... Tom W.
|
Posted By: MysticCobra
Date Posted: 23 Jul 2015 at 5:51pm
|
Posted By: jzawodn
Date Posted: 23 Jul 2015 at 6:03pm
Correct. I snapped the pic after a few minutes of us flying along and seeing the 13.5 value count down from something in the 14.x range to 13.5 and then stabilize. My instructor commented that I better take good notes so that I can ask the question right, and so I decided to shot a few pictures of the screen. (I also grabbed the full data logs today.) I think I still have some Garmin to unlearn. My main confusion is why that value EVER changed. Was it measure "leg distance" or "leg distance remaining"? I'm assuming the later and it changed a bit as we flew through part of that turn. Or maybe not. I'm quite happy to have the IFD iPad simulator. Thanks, Jeremy |
Posted By: n7ifr
Date Posted: 23 Jul 2015 at 6:08pm
|
Now I see the Magenta line off to the left. Looks like not flying the FP, so all bets are off for the data-block showing ECA via the FP. So far, I am doing most of my 540 flying in FMS page, giving more FP changing flexibility, and putting the "To Wpt" block on Left side so it is always there no matter if in FMS or MAP page (Traffic Thumbnail on Right side). Using the MAP page more for cruise, once the FP is established and want pretty picture and lots of data blocks. Tom
|
Posted By: MysticCobra
Date Posted: 24 Jul 2015 at 8:19am
|
Posted By: n7ifr
Date Posted: 24 Jul 2015 at 9:17am
|
The flexibility of v10.1 is pretty cool. Move the Traffic Thumbnail to the right side and free up valuable left side for other parameters... the left side is visible on FMS screen as well as MAP!
Tom |
Posted By: DavidBunin
Date Posted: 25 Jul 2015 at 2:34pm
|
I've been playing with that feature myself. The scroll doesn't go in forever, so you can't just keep adding and adding data blocks. The scroll length is just under twice as tall as the IFD-540 screen, so whatever you have in the middle of your list is always visible no matter how you scroll. Still, a VERY nice feature! David |
Posted By: bneub111
Date Posted: 25 Jul 2015 at 7:37pm
| You could use the NRST button. Keep clicking it until the nearest VOR's page shows up. That will give you distance and heading. |
Posted By: jzawodn
Date Posted: 26 Jul 2015 at 12:33am
Given the situation, that's probably quite a good idea, actually. ;-) Jeremy
|
Posted By: bneub111
Date Posted: 26 Jul 2015 at 10:21am
| I started using that to give a position report when requesting flight following. |
Posted By: n7ifr
Date Posted: 26 Jul 2015 at 10:53am
Great convenience for position reporting. Easy format using "radial" from instead of "bearing" To (like on Nearest). Tom W.
|
Posted By: AviJake
Date Posted: 26 Jul 2015 at 10:55am
|
We do have an enhancement entry in our future feature candidate database which adds "Nearest VOR" to the datablock options. It would be name of VOR station, radial from station and distance from station as measured by GPS. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: jzawodn
Date Posted: 26 Jul 2015 at 12:12pm
Excellent. Thanks!
|
Posted By: AUXAIR
Date Posted: 26 Jul 2015 at 12:25pm
|
Have you also thought about providing a distance (to next waypoint) in the Top Block options? There is a Desired Track option, but no distance option for the top block. This would provide a quick look at path and distance for each waypoint or destination as it came up, without having to bring up and look through the side blocks. Thanks ------------- David E. Cessna 182 RG II |
Posted By: pburger
Date Posted: 27 Jul 2015 at 2:27pm
|
jzawodn, You are not the first, nor will you be the last to be confused by what you are seeing. Please see this thread that I started last year. Read through the whole thing to get a full understanding of what you are seeing: http://forums.avidyne.com/forum_posts.asp?TID=515&KW=pburger&PN=1&title=issue-with-direct-to-distance-count-down" rel="nofollow - http://forums.avidyne.com/forum_posts.asp?TID=515&KW=pburger&PN=1&title=issue-with-direct-to-distance-count-down Regards, Paul B. |
Posted By: jzawodn
Date Posted: 27 Jul 2015 at 4:11pm
Ah ha, thank you. That didn't turn up in my earlier searches so I'm glad to have it now. Jeremy
|
Posted By: TomG
Date Posted: 27 Jul 2015 at 6:04pm
|
Another way to find your answer is to: 1) tap NRST until the VOR page is depicted 2) read your distance and bearing to the ECA VOR. Just a thought..... ------------- Tom G |
Posted By: DavidBunin
Date Posted: 27 Jul 2015 at 6:16pm
|
Tell Speedbird I said hello!! |
Posted By: pburger
Date Posted: 28 Jul 2015 at 8:13am
| Will do! |