IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM

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ETE value

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=492
Printed Date: 02 Jul 2024 at 9:38pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: ETE value

Posted By: oskrypuch
Subject: ETE value
Date Posted: 13 Dec 2014 at 12:48pm

Sitting on the ground, in the hangar, playing around, and I noticed that the ETE values filled in, in a flight plan I was loading.

Q1) Cool feature that it does it, but wondering what airspeed value it uses, when you are motionless on the ground and not in the air?

Q2) When you are in the air, does it rely on your current airspeed (GS) only?

* Orest

Replies:

Posted By: AviJake
Date Posted: 14 Dec 2014 at 9:41am

I don't recall. I'll look this week.

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Steve Jacobson
sjacobson@avidyne.com

Posted By: AviJake
Date Posted: 14 Dec 2014 at 12:35pm

Just looked it up.

"Book values" are used on the ground and are contained in an internal file. We built the software design to handle multiple different aircraft types but that became a mess in implementation so for now, the current values are Cirrus-like. In the air we use current groundspeed.

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Steve Jacobson
sjacobson@avidyne.com

Posted By: edanford
Date Posted: 14 Dec 2014 at 12:37pm

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Ed

Posted By: edanford
Date Posted: 14 Dec 2014 at 12:40pm

A suggestion is to use the average speed ground speed stored in IFD540 for ground calculations if there is enough data (hours) stored. Cirrus average works well for me but that would not be very accurate for a Cessna 150 or 172

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Ed

Posted By: oskrypuch
Date Posted: 14 Dec 2014 at 12:42pm

Or a user setting, on the AUX user settings page.

* Orest