I wouldn't worry about about those tiny wrinkles, you will not feel any difference on the water. A new sail also has to "wear-in", the seams are both glued and sawn without any tension and they will all have to adjust a little to the tension of the fully rigged sail. So you wear-in a sail gently, don't pull absolutely full downhaul etc for the first outings. With time the sail will settle and you can use more downhaul without risking that the tension being located in some specific small spot of the sail where it can cause damage.

To me figure 4 looks pretty normal, in fact with time you could probably tension the lowest batten more. I cannot see the sail having any tendency to make wrinkles along the batten, as it would if it was over tensioned. The bend of the batten should easily flip over to right side once there is some wind in it. Some sails are even given extra tension intensionally in the lower part in order to get some more shape there. The top battens should not be tightened that much though.

I cannot see anything wrong with the seam itself in picture 4.

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Sea Lotus said..
Hey, i got new sails but one of them has a problem imo, probably neglectable effect but do you think i can get a replacement? Since they don't have in stocks i may get a 2022 one after using this for a while :)

2021 3.7 blade came with bottom batten bent in one way slightly and has one huge wrinkle(?). I know i should put more tension on it to reduce the monofilm wrinkles, i did but then there is too much arc and stays in one way, and it doesn't effect the huge wrinkle at all, ao i didn't want to risk it and keep it as it is.

Hi,
In my opinion there is a design error. Batten place is wrong. It should be 30 or 40 cm below.

Melih...

There is another test that would be quite useful, try tensioning the batten without having rigged the sail. Just roll it out on flat ground and see what the batten and batten pockets look like. That way there is no influence of mast stiffness etc. If the batten pocket has been made correctly those wrinkles would easily come out as the batten is tensioned.

The bending of the batten/battens when the sail is rigged is then simply due to a deep shape around the boom area in these "power-wave" sails, compared to other, flatter, sail models.

I got reply from Severne, they say sail design is like that and smaller sails "at times" can have that bump (which i understood as it is indeed a manufacturing error), but it wouldn't effect the performance in any way, so they don't see it as a warranty issue as long as it doesn't effect the performance and they won't replace it.

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SurferKris said..
I wouldn't worry about about those tiny wrinkles, you will not feel any difference on the water. A new sail also has to "wear-in", the seams are both glued and sawn without any tension and they will all have to adjust a little to the tension of the fully rigged sail. So you wear-in a sail gently, don't pull absolutely full downhaul etc for the first outings. With time the sail will settle and you can use more downhaul without risking that the tension being located in some specific small spot of the sail where it can cause damage.

To me figure 4 looks pretty normal, in fact with time you could probably tension the lowest batten more. I cannot see the sail having any tendency to make wrinkles along the batten, as it would if it was over tensioned. The bend of the batten should easily flip over to right side once there is some wind in it. Some sails are even given extra tension intensionally in the lower part in order to get some more shape there. The top battens should not be tightened that much though.

I cannot see anything wrong with the seam itself in picture 4.

That was what i was thinking of at first, increase the tension slowly by time to wear it in.

Anyway, thanks for all the feedback, got the answer to my main question; can't get a new one for free.

Interesting... have you sailed it? If the batten isn't broken then I'd just try and tune the tension until the shape is as good as it can get and just forget about it.

Will not be buying a severne sail with that kind of QC and customer support.

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Sandman1221 said..
Will not be buying a severne sail with that kind of QC and customer support.

I have never heard of any sail brand that would replace a sail, just because a batten has not been tensioned at all...?

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SurferKris said..

Sandman1221 said..
Will not be buying a severne sail with that kind of QC and customer support.

I have never heard of any sail brand that would replace a sail, just because a batten has not been tensioned at all...?

You draw the circle on the first picture, i wrote why it is not tensioned, next pictures are tensioned, and i sent latter pictures to Severne. Anyway, issue is not batten tension, can't you see the big bump there? I think its pretty obvious.
You can see batten as tensioned below again, the bump is still there. You can olso read my explanation about that bump, which i shared with Severne, which they agreed to be a manufacturing error, so its not just a non tensioned batten.

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Sea Lotus said..

2021 3.7 blade came with bottom batten bent in one way slightly and has one huge wrinkle(?). I know i should put more tension on it to reduce the monofilm wrinkles, i did but then there is too much arc and stays in one way, and it doesn't effect the huge wrinkle at all, ao i didn't want to risk it and keep it as it is.

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Sea Lotus said..
Ok i put more downhaul and less outhaul, tensioned bottom batten to the max to get rid of wrinkles, again, it seems to have too much arc and slightly wants to bend in one way(4th pic).
After looking closely there is an extra layer of fabric starting around at that bump point (on both sides for 3.7, only one side for 4.2), maybe glue problem caused it to slide, then it probably got stitched that way to the sail which olso causes the sail to have that extra wrinkle.

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Sandman1221 said..
Will not be buying a severne sail with that kind of QC and customer support.

Actually i had been very happy with customer support from Dieter since 3 years, he replies me immediately, contacts r&d and selas dept to come with answers, or give detailed suggestions which gear to chose etc... maybe their warranty system is not on par with other brands, but good customer relations.
This is the first (very small) qc problem i faced after buying 7 sails from Severne, they are great sails, durable too, so i will keep buying from them.
I had qc problems about their boards though.

All that I can see in the later images is a batten that still appears to be slightly under-tensioned. The same goes for the red 4.7 sail. There are creases in the sail cloth itself that run perpendicular to the batten. This is a clear sign of under tension, but it will still be fine to sail with it like that. As the sails wear in you can come back to the battens and tune them again. It is better to start with a little under-tension rather than cranking too much straight away.

Another thing to look out for is the position where the batten changes shape and cross-section. It goes from a rectangular cross-section in the front, over to a circular cross-section further back and then a jump up in diameter at the ferrule. This is alway a problematic area as the batten pocket has the same size while the batten (and the require batten space inside the pocket) changes. At this position you will always see a few wrinkles (for each batten of the sail) starting and running forward from the ferrule on the batten. These wrinkles should not be tightened out, as that will give you an over-tensioned batten.

This is not an issue that is unique to Severne sails in any way, these are just common issues with our types of sails and materials.

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Sandman1221 said..
Will not be buying a severne sail with that kind of QC and customer support.

The sail is designed like that, the wrinkle comes out when its full of wind, all mine look like that, and it appears that some people here didn't know its supposed to look like that.

So what r u on about?

My Aerotech Freespeed sails do not have anything like that, nice smooth shape when properly tensioned.

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Sandman1221 said..
My Aerotech Freespeed sails do not have anything like that, nice smooth shape when properly tensioned.

Really, a quick image search came up with this:

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Sandman1221 said..
My Aerotech Freespeed sails do not have anything like that, nice smooth shape when properly tensioned.

Freespeed. Sounds pretty freeride or something to me?

Blade is a new school wavesail. That luff wrinkle is supposed to be there, and the tiny ones on bottom batten pocket are insignificant.

So you're basing a statement to thousands of people online, that Severne customer service and QA must be crap - on your experience of how a freeide sail of a different brand sets. ??