Incorrect turn at ZMCK

[falcon71]

I flew to ZMCK with the ILS Y 29 approach via SER 1. It has an outbound leg to the right at 129° with a left turn towards final. During preflight, the drawing on the ND looked correct for the procedure. However, when flying, the INTC waypoint moved to the left instead of right:

I am using Navigraph AIRAC 2405.

[Crabby]

It was 1972 and Vietnam was still in the nightly news.  The USA was still sending men to the moon and Chuck Berry had a hit single called My Ding-a-Ling.  Also noteworth, but barely reported, RNAV systems at the time could not fly curved segments.  Pilots had to fly to SER, then outbound on 129 radial using NAV (not RNAV), then at or before 17 dme they would initiate a left turn to intercept using HDG.  Ahh, the days of pilots doing pilot crap.  

[Crabby]

Forgot to add, October 1972.  First flight of the A300-600

[falcon71]

1 hour ago, Crabby said:

 Pilots had to fly to SER, then outbound on 129 radial using NAV (not RNAV), then at or before 17 dme they would initiate a left turn to intercept using HDG.  Ahh, the days of pilots doing pilot crap.  

Well, that's exactly what I did. What are you trying to tell me? Should we not report bugs anymore, because these bugs may or may not exist in the real aircraft?

[Crabby]

3 hours ago, falcon71 said:

Well, that's exactly what I did. What are you trying to tell me? Should we not report bugs anymore, because these bugs may or may not exist in the real aircraft?

I thought you would understand, the plane was developed in the early 70's and the RNAV systems were not capable of curved segments, like the tear drop on the approach you used.  It is not a bug.  It is an old plane with old systems that needs to be flown.  The ND will not even draw curved segments like a teardrop. 

Edited May 18 by Crabby

[falcon71]

Thanks Crabby for clarification. This is a misunderstanding, my issue description was not clear. Let's try again:

I'm well aware that it does not draw curved segments. This is how the procedure is drawn during preflight:

This looks absolutely correct to me, just like in the charts with a leftwards turn to final.

Once I arrived, the procedure looks different and it became a rightwards turn:

I would have expected it to still look like in the first screenshot. Again, I fly these procedures using raw data when this stuff happens, but I assume this may be a bug which iniBuilds may want to fix or at least be aware of.

[Crabby]

Ok, gotcha.  Could be.  Could be a problem with the navdata source (in the case of the INI 300, default sim).  Could be a conflict too, if using Navigraph to replace the sim data.  I would disable Navigraph in sim data (if you use it) and see what happens in this very instance.  It could give a clue where the fault lies. 

[richboy2307]

 

On 5/18/2024 at 3:01 PM, falcon71 said:

Once I arrived, the procedure looks different and it became a rightwards turn

Thanks for the report. Can you confirm the navdata you are using? 

[falcon71]

Yes, it was Navigraph AIRAC 2405.