Post by Paavo on Jul 12th, 2011 at 3:30pm
Hi,
I just noticed that the FMS ignores the turn direction specified in VI (heading to intercept) type of legs. I have checked the Navigraph-supplied navdata and it is correct.
I'll give you an example based on departure PORTE3 from KSFO runway 01L.
Excerpt from the chart:
After takeoff, the aircraft is instructed to climb to an altitude of 411 ft on heading 012, then it should fly 4 NM on 350 (Navigraph has coded this DME fix as waypoint SEPDY) and at 4 NM, a left turn to heading 200 should be made and flown until PYE radial 135, whichafter another left turn is made towards PORTE.
Here's how 757's FMS displays the procedure:
Corresponding entries in sids.db are as follows:
Quote:
As you can see, the VI leg allows left turns only.
I just noticed that the FMS ignores the turn direction specified in VI (heading to intercept) type of legs. I have checked the Navigraph-supplied navdata and it is correct.
I'll give you an example based on departure PORTE3 from KSFO runway 01L.
Excerpt from the chart:
After takeoff, the aircraft is instructed to climb to an altitude of 411 ft on heading 012, then it should fly 4 NM on 350 (Navigraph has coded this DME fix as waypoint SEPDY) and at 4 NM, a left turn to heading 200 should be made and flown until PYE radial 135, whichafter another left turn is made towards PORTE.
Here's how 757's FMS displays the procedure:
Corresponding entries in sids.db are as follows:
Quote:
| 00411;0;+;0.0;0.0;0.0;;91.000000;181.000000;12.0;VA;;0.0;1;0;0;RW01L;;0 01600;0;+;0.0;0.0;3.0;SEPDY;37.685667;-122.363667;350.0;CF;SFO;0.0;1;0;0;RW01L;;1 0;0;0;0.0;0.0;0.0;;91.000000;181.000000;200.0;VI;;0.0;1;0;0;RW01L;L;0 09000;0;+;0.0;0.0;5.0;PORTE;37.489786;-122.474578;135.0;CF;PYE;0.0;1;0;0;RW01L;;0 |
As you can see, the VI leg allows left turns only.