If i make up a flight of four aircraft to attack a target (or whatever) two of them always lose height and crash shortly after taking off-the other two always do their stuff and return home.Any solution to this?

the only solution is higher altitude, and put the flights on ace.

This happens a lot to everyone.

i usually split 4's into 2's. also check the waypoint info to make sure the speed and alt is set. i agree with the "dude", all my AI is ace level.

Try using Mission Mate, I never had any problems like this when I used MM, or placed them myself for that matter and I have used groups of 4 Rookie and Average AI bombers many times. I have seen AI crash into each other, but not when they are in the same group (that I have noticed). Check their airspeed and altitude on the first waypoint.

Getting the AI to work properly usually takes more time and work than any other aspect of mission building.

Good luck.

Hi Blindman-Thx for that-yup,FMB takes a lot of patiece,but its good when you finally get one right !!
I downloaded the missions on your link,but how do I get to open them rar files?I remember I got it once and the 40 day trial period run out before I got to use it,so I guess gotta buy it.
Ok buddy,any tips greatly appreciated,as me not good at installing this stuff....thx

tallyman44,

I use WinRAR and never paid a dime.
http://winrar.d0wnloadz.net/
I'll look into putting the missions up with ZIP too.

Some great info on FMB can be found here:
http://www.il2-fullmissionbuilder.com/index.php

Good luck.