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Turn anticipation onto final? (Read 941 times)
Feb 8th, 2018 at 7:16pm

blueflyer   Offline
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Posts: 114
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I have my G430W tied to my D100/HS34/AP74 autopilot system.  When I am flying an RNAV approach, all the turns  on the approach plate that lead into the turn onto final perform "turn anticipation."  I can see the dotted anticipation turn on the 430W and the autopilot flies the anticipation course.  But, the turn onto the final approach course never gives me turn anticipation and the autopilot flies through the final approach course before it turns back to intercept.  Why doesn't the turn to the final approach course have the turn anticipation?
 
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Reply #1 - Feb 9th, 2018 at 6:20pm

Dynon Avionics   Offline
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Does it do it on all approaches, or a particular one (what's an example of one)? Are you positive you're not doing vectors to final?
 

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Reply #2 - Feb 10th, 2018 at 5:19am

David Brown   Offline
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The GNS does not do the same GPSS output like the GTN, so I expect this is the issue.

You can tighten up the settings but it is a GNS output I reckon.

YMMV of course Smiley
 
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Reply #3 - Feb 10th, 2018 at 5:50am

blueflyer   Offline
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Yes, Im certain Im not doing vectors to final.  Its just peculiar I get turn anticipation on all the other turns depicted on the approach plate except for the turn on the final approach course.  I will go find some other LOC approaches and see if I get the same thing.
 
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Reply #4 - Mar 3rd, 2018 at 11:24am

blueflyer   Offline
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OK, well I did the same approach yesterday, but I approached the inbound course from the other side.  I dont think that really matters in any way.  On this approach, the 430 showed the turn anticipation and the autopilot did execute the turn anticipation.  Just wanted to close the loop on this.  Its nothing I am going to troubleshoot further.

 
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Reply #5 - Mar 15th, 2018 at 2:09pm

blueflyer   Offline
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Well, I did the approach again from the side of the inbound approach course which originally I posted about in post #1.....and no turn anticipation.  I cant figure out whats going on.
 
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