Turn anticipation question
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=864
Printed Date: 19 May 2024 at 11:32am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: Turn anticipation question
Posted By: pchetham
Subject: Turn anticipation question
Date Posted: 30 Oct 2015 at 6:53pm
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Does the IFD540 Navigator support GPSS turn anticipation? When I select an IAF that depicts a hold for the course reversal, I will fly past the fix (to the non-holding - unprotected side) before turning to enter the hold. The fix is a published fly-by (not a fly-over) way point. I would have expected GPSS turn-anticipation would have turned me before reaching the fix to keep me on the hold (protected) side of the final approach course. Thanks ------------- PMC |
Replies:
Posted By: Gring
Date Posted: 30 Oct 2015 at 7:54pm
| Yes. |
Posted By: pchetham
Date Posted: 30 Oct 2015 at 8:52pm
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But apparently not for the situation I described. I also confirmed this on the simulator - does the same thing - overflies a fly by way-point. ------------- PMC |
Posted By: oskrypuch
Date Posted: 30 Oct 2015 at 9:57pm
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What is the airport/approach, and what is the waypoint? * Orest |
Posted By: pchetham
Date Posted: 01 Nov 2015 at 9:54pm
This seems to be the case for any IAF (coupled approach - DFC90 autopilot) where you are positioned for a parallel entry for the course reversal (I also tested this using the simulator - same result). In my airplane I was Northeast of HRMER (RNAV 35 approach - KFTG). I overflew HRMER, was West of the final approach course. GPSS then turned me back to intercept the outbound course. This put me on the "unprotected" side of the hold. I would have expected the GPSS steering to anticipate the turn and intercept the outbound course without overflying the fix. ------------- PMC |