In general rolling maneuvers work well. A lot of mustang pilots when they end up with a 109 on their 6 tend to kick the rudder and do plenty of semi crazy maneuvers which really makes gunnery tough but in the long run bleeds energy and eventually gets you killed.
Otherwise at the extreme ends of the speed envelope rolling becomes tough in the 109 especially if you don't know how to work the rudder/throttle to get her to do what you want. If you can convince a new 109 pilot to follow you into a flat scissors you can usually get them within a few cycles. That being said experienced guys will just go up and then come back down on you if you get too slow doing that. Otherwise steep dives and pulling out at low altitude/high speed can catch new guys out too and might even snap the wings off of one if your lucky.
Things that make my life easy are if you try to turn with me, especially as the speed gets low. Ive been in many a 1 circle on the deck with both pilots at 300-350kph. At this point the mustang can't run as you've used all your energy and the 109, whilst easy to throw away with uncoordinated rudder, turns much better. I'll be behind you within 2 turns and you'll have nowhere to go.
This being said there are Mustang pilots out there who can turn with 109's. Solty and Trouble are 2 that come to mind. The difference is really that drastic that you can usually tell if its one of them just by how well theyre keeping up the turn.
Just to be clear, all of this is just my observations about flying WW2 in DCS. Im not the greatest 109 pilot in the world by any means but Ive done enough of it now that I think im starting to get a feel for it. As many others in this thread have said the best option is and always will be to know your plane, don't get into a fight your plane isn't suited to and fly with a wingman.
Edit: Someone mentioned something about a downward spiraling turn at some point. This sounds like a good idea. If you can sucker the 109 into getting the speed up above 500 kmh the turn rate comes down a fair bit and hell either lose maneuverability or try to bug out of the turn and bleed off speed and waste some energy/present himself as a target. Conversely an upward spiral is one of my favorite things to do against the mustang. Its a good way to eek out an energy advantage with the superior climb rate.
S!
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