So guys. I am new to windsurfing and I therefore dont have much experience (I can only beach start, plane a bit, gybe and tack) there fore I dont have much knowledge about sails. I have recently bought a severne SWAT and I have noticed that when I rig and when I am i am on the water the battens get stuck next to the mast and wont rotate freely. This has got me a bit worried because I dont want to wreck the battens or worse the sail so any tips would be appreciated. Also I have tried tightening outhaul downhaul but nothing seems to realy help I have alsk tried adjusting the tension of the battens but that isnt much use either. The only real way that I can fix it is by pulling on the downhaul so much that it crinkles the sail and starts make quite a few loud bangs. Please help me out because I dont want to wreck my brand new sail

I have a chinook 40 percent carbon 400

Have a look online at some rigging guides.

I'm using Severne S1's on a Neil Pryde mast, about the worst combo I could get but it's what I had.
If I put too much downhaul on the leach goes really floppy but the batten just above the boom is still over the mast. It's just a case of getting it rigged as well as possible which has a nice amount of floppy leach but the battens still need a good pump to get them to rotate over. Not ideal but at least I can get out on the water.

Batten tension should be just enough to get the little creases out of the batten pockets.
Outhaul within 1-2cm of the boom measurement on the sail.
Downhaul, pretty close to the measurement on the sail, check the size of the floppy leach, if you take some tension off the leach gets tighter, if you put too much on the leach is really really floppy.

There are some good youtube videos on sail trimming.

Cheers
Graeme

Thanks guys this has really helped. I will have alot of things to try next time I get out on the water. By the way my mast is a standard diameter

I think it is a combination of not enough downhaul, wrong curve (albeit only slightly) and SDM - a Swat would be cut on a RDM (?)

It will work OK - but only if downhauled enough