Hi Fellas I've installed several Aardvark aircraft as AI taffic and they work very well but a few of them have been "porpoising" upon landing or take off. Specifically Air Canada 737-200's, and Alaska Airlines 737-400's. They communicate with ATC OK but porpoise towards the runway finally crashing and disappearing into it. They take-off normally until they get airborne and then porpoise off into the distance. Can I change something in the aircraft config. file to prevent this? Thanks Ken

The usual reason for this is that you are using FS2002 fde's in FS2004.You need the fs2004 update:http://library.avsim.net/esearch.php?CatID...acrp&DLID=40738David R

David Thanks for your help. Regards, Ken