This is NOT mine. This was posted by someone back in 2008. Sorry to say, I've lost the name. Just thought I'd pass it along. This will allow you to increase the speed of any ship, permanently. It really works. Again, I can take no credit for this but whoever it was, I say, thanks a bunch! Here is his posting:
YES!!! I found it! Go into Files folder, then Com, then Madox, then IL2, then Objects, then open up Ships in Notepad, and scroll down until you come across the CVEs - there will be separate entries for each one, and you will see two sets of numbers side by side. The first is it's default speed in the FMB, and the second is it's max speed. I set it to 56 for the default, and 70 for the max. 56 kph is the max speed for the Essex class CVs, and 70 is the max for the DD's. I then went into the FMB and checked it out, and presto! 56 kph was the default speed of the Cassablanca when I gave her two waypoints. You can do this for any of the ships BTW.
Mods/ShipPack/Com/Maddox/il2/objects
Example:
//----------------------------------------------------------------------
[USSCasablancaCVE55]
Description Casablanca Class Escort Carrier
Icon shipDestroyer
// Model
Mesh 3do/Ships/USSCasablancaCVE55/Hier.him
// Motion Parameters
SliderDistance 390.25
Speed 56.0 //70.0
SoundMove models.Ship