DAL191 wrote on May 25^th, 2011 at 7:39pm:


Yesterday I did the same flight.
Everything went well till about after TUC ( VOR Tunis Cartage ).
On the CDU I saw a descent of 10.000 ft in 8 miles...
So just before the STAR ( ATLE1R) I manually did a turn left , flew 5 minutes straight on and then made a turn right.

I was hoping the aircraft would catch up with the next waypoint , but the aircraft tried heading back to Tunis ( north, while Monastir was in fact south-west).
No possibility to delete waypoints before the STAR and the CTR stayed on the waypoint just after TUC.

I manually flew the STAR ( ATLE1R ) till the LOC casptured the signal.
Then the App was very easy and the aircraft made a pefect landing.

Read the May 12th and 14th, 2011 posts in the follwing thread.http://www.captainsim.org/yabb2/YaBB.pl?num=1208001573/195.

Michael Cubine

Libretto wrote on May 26^th, 2011 at 8:14am:


Just tried this flight again and now it flew the ATLE1R Star.
However at the end of the Star it is just 3-4 nm to the airport and the FMC had me flying at 2600 ft.
Impossible to descent in 40 seconds.....
Speed was just 152 knots.

I tried again and turned of VNAV to come in lower...
It is a very steep turn and then Loc and almost immeditaley App and Gear out.
Before you know you overfly the airport....  

Btw : I used 3D Real Cockpit Effect on the flight and it really added to realism.

DAL191 wrote on May 26^th, 2011 at 2:27pm:


LOL  

Unfotunately my wife is from Tunesia , Sousse ( that is just near Monastir) so I can't stay away....

I checked FSC 9 and it said that after the turn I should come in at 2714 ft and be direct in line with the rw.

What I experienced is that after the turn the aircraft was much closer to the airport ( 3-4 miles perhaps instead of 7 miles as it should be ) and in a line of 15 degress to the right of the airport.

FSC 9 is reading also Navigraph data like CS does.
So what was the mistake here...?  

BTW

I myself did a bit scenery designing myself last year

Monastir Harbour ( Airport in the distance )
members.casema.nl\gsalden\Tunesie1.jpg

Monument former President Habib Bourguiba
members.casema.nl\gsalden\Tunesie2.jpg

Sousse Harbour
members.casema.nl\gsalden\Tunesie4.jpg

Sousse Boulevard
members.casema.nl\gsalden\Tunesie5.jpg

Port El Kantaouie ( Sousse North )
members.casema.nl\gsalden\Tunesie7.jpg

Example coastline corrections
members.casema.nl\gsalden\Tunesie8.jpg

This what was in the FMC and FSC 9 , but the aircraft did not make the turn right and also did the turn to early.
Even without the DME arc it had to be done correctly. 

To make it look like this I had to take out MON/13.

wims wrote on May 26^th, 2011 at 3:47pm:


Thanks for the info.
Probably the angle was to much for the aircraft and it couldn't line up correctly.

For my earlier mentioned problem , flying another direction with HDG  for a while and then trying to return to the fp ,I found an answer here at the forum, posted by Sjef Gielen :

I allways fly the plane in heading mode because the DME Arc is not in the STAR, as soon as I've flown the ac to the first waypoint after the DME Arc I want to switch to LNAV (Which is allready armed on the runway), but as soon as I want to do that the aircraft turns 180 degrees and heads back to the previous waypoint which isn't on the legs page anymore. I found out that switching to LNAV right before a waypoint works fine, but when, say, flying halfway inbetween two waypoints it allways turns back to the previous one.


I also found the follwing about flying a DME ARC with a FMC.
This translated by Google in English.
Don't know if it can be done this way with the CS FMC.

How do you now fly a DME Arc ?
Eg : the  APP for Madeira uses a DME Arc.

Visit the FIX page on the FMC, and enter at the FIX position the name of the circle drive where the DME is based on.

On the RAD / DIS below enter "/ 10" if it is a 10 DME circle, or / 12 if it is 12 DME arc.

On your map will display a circle that you can fly by hand, also called poor man's DME arc.
It is NOT part of your flight plan, so follow your autopilot in LNAV NOT that circle

Do you want the autopilot fly this in LNAV mode then you need to add  points to your flight plan

Set the Navaid used as the basis for SPL circle and the circle begins at 10 DME distance on the 180 radial (due south of the VOR) and ends on the 090 radial (due east)

Add the following points to your flight plan:
SPL180/10 SPL180/10
SPL170/10 SPL170/10
SPL160/10 SPL160/10
etc t/m etc to
SPL090/10 SPL090/10

Possibly with height restrictions.
Press execute and the points are in the flight plan.

In real life one will often use the manual method using the RMI instruments or to circle the fix page.

Here I found what my aircraft did.
Notice the final turn to soon.



Below a short fp from Tunis to Monastir ( 20 minutes )


First I checked the fp without any SID/STAR  ( looked ok to me )



Then I added the Rw + STAR  ( looked ok again )



After that the STAR  (   already it's starting to look not good )



And this is how the fp looks like when zooming out...( nothing done , just added the arrival rw and STAR !  The FMC made out of this short flight something with 4 pages of Legs )



But, when starting first with the STAR, then the arrival rw and then the SID + rw it looks already better and only a few double entries need to be deleted to get the following fp including the Go-Around holding pattern  ( the last was automatically added )

Libretto

The arc worked fine. The attached image shows the plane approaching the first the first waypoint in the arc. It then turned right, flew the arc, turned left and intercepted the the LOC and GS and made an autoland. I typed a detailed explanation several hours ago but it went into thin air
when I was trying to get the image under 200 KB and posted. If you have any questions, just post them.

Michael Cubine