Avidyne Homepage
Forum Home Forum Home > Avidyne General > IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
  New Posts New Posts RSS Feed - Calculators
  FAQ FAQ  Forum Search   Register Register  Login Login

Calculators

 Post Reply Post Reply
Author
Message
DavidBunin View Drop Down
Senior Member
Senior Member
Avatar

Joined: 20 May 2015
Location: Rockwall, TX
Status: Offline
Points: 742
Post Options Post Options   Thanks (0) Thanks(0)   Quote DavidBunin Quote  Post ReplyReply Direct Link To This Post Topic: Calculators
    Posted: 10 Sep 2017 at 11:43am
I noticed two things the other day while trying to use the Calculators function in my IFD.  Maybe I knew about this before (when the pilot guide was freshly-studied material in my mind) but not now.

When setting up the Air Data Calculator, the heading won't go through zero.  My heading was something like 020 on this flight, and the last time I used the calculator it was 350.  The IFD would not let me go "right" through 359 to get from 350 to 020.  I had to go "left" all the way around the dial.

Once I had it set up, my Headwind was shown as -17 Kts.  Why doesn't it change to "Tailwind"?

Maybe some details to consider for a future software release?

David Bunin

Back to Top
Gring View Drop Down
Senior Member
Senior Member


Joined: 30 Dec 2011
Location: Kingston, NY
Status: Offline
Points: 722
Post Options Post Options   Thanks (0) Thanks(0)   Quote Gring Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2017 at 7:22am
I use the calculator on every flight, and yep, it works exactly as you describe.
Back to Top
teeth6 View Drop Down
Senior Member
Senior Member


Joined: 10 Mar 2014
Status: Offline
Points: 741
Post Options Post Options   Thanks (0) Thanks(0)   Quote teeth6 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2017 at 9:35am
Hi David,

That is how it indicates a tailwind.  It displays with a "minus" sign. -17 is a tailwind and if it were a headwind it would be just 17 (no minus sign)
Back to Top
oskrypuch View Drop Down
Senior Member
Senior Member


Joined: 09 Nov 2012
Location: CYFD
Status: Offline
Points: 3058
Post Options Post Options   Thanks (0) Thanks(0)   Quote oskrypuch Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2017 at 9:42am
Originally posted by DavidBunin DavidBunin wrote:

...
Once I had it set up, my Headwind was shown as -17 Kts.  Why doesn't it change to "Tailwind"?


That is kind of a convention with FMSs.

* Orest

Back to Top
DavidBunin View Drop Down
Senior Member
Senior Member
Avatar

Joined: 20 May 2015
Location: Rockwall, TX
Status: Offline
Points: 742
Post Options Post Options   Thanks (0) Thanks(0)   Quote DavidBunin Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2017 at 12:15pm
Originally posted by oskrypuch oskrypuch wrote:

Originally posted by DavidBunin DavidBunin wrote:

Why doesn't it change to "Tailwind"?

That is kind of a convention with FMSs.

That's a shame.  Maybe it's time to change the convention.

David
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 0.129 seconds.