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Gunsails BOW

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Created by Nubie 4 months ago, 16 Mar 2019
Nubie
56 posts
16 Mar 2019 5:00AM
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Does anybody try this sail ,what are your feedback and what do you think what is future with BOW concept compare to classic LOOSE LEACH sail?
They saids that sail has tight leech but in video at 0:50 I can see loose leech.
link:
gunsails.com/en/bow2019



LeeD
536 posts
16 Mar 2019 12:13PM
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Simmer and Gaastra?

ned321
42 posts
16 Mar 2019 3:08PM
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German SURF magazin test drove them already, summary is on the website
gunsails.com/en/blog/news/test-bow-2019.html

ned321
42 posts
16 Mar 2019 3:19PM
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And also first user reports on the french W33 forum.
www.windsurfing33.com/forum/viewtopic.php?f=42&t=113865&start=75

I can read french. For those who can't, below translation to english with google translate ;)

___________________________________________________
Gandalf85; 03-dec-2018

That's it, I tested the 7.8 bow.
Very special nav conditions so lots of things to check later, preferably not alone as was the case today.
irregular grain time 10 / 20n with heavy swell and choppy.
Nav in slalom with lda sl3 105, fin chopper 36.5.
To rig it is a bit boring to put the mat at the top of the sail because of the very pronounced luff circle but the mat is so supple at the top that it bends when you put it on. Moreover even holding the mat in hand, I begin to bend it, it is amazing. Tacking is super easy, it is almost a wave sail in tension. The profile is clean, I barely make it scream, I probably work in setting because it is very confusing this concept. The mast is quite heavy (it is 70%) but the sail is significantly lighter than the GSR 7.8 2018. On the water the rig has a great feeling of lightness compared to my gsr 7.8 18.
the wish window is lower and the position of the eye is also listening. The sail is the same height in vertical ground. Less volume at the front of the profile.
On the water, pomping, it returns super good. The rigidity of the rigging is close to the vector. Once in the planning, it behaves finer, the sail advances alone and is less physically demanding than the GSR 18. Despite the tense fall, the sail generates a good lift, it's cool. At the down, I have the impression that goes super fast without forcing. the cams are great, we do not even care, only the snap reminds that they are there. For the near, to see.
I go back to the water this week, and this time the gsr 7.8 18 rigged in parallel to better compare.
________________________________
Julien85; 02-jan-2019

Test the 8.7m? in a wind from 6 to 12 knots today with my foil pryde.

Big surprise, the sailing is surprisingly stiff from the body to the pumping. We can copiously go there, the whiplash is direct. Me who was waiting for something soft to see more ... Reactive and accurate, the start to the schedule is powerful and other surprise but I expected a little more, the slide that follows is very nice.

Under sail, this sail seems very aerodynamic, at the same time very fine and with a lot of speed. A very pure glide, without needing to border as much and as far as with my Vector. When the wind rises, the differences are smaller compared to a classical profile. The sail is very stable and offers a fairly fine profile in attack, nice.

A concept completed and not so confusing that it looks. She can in view of what I felt widely take in use fin there is no doubt. With its foil glide, it has a very wide spectrum of use.
___________________________________________
Julien85; 28-jan-2019

Small test of the Bow in 7.8 in fin mode. Too much wind to attempt the foil ... 20 knots established with choppy.
Side setting, it is necessary to go far beyond the recommendations for a windsurfing use. The sail opens slightly in the lead and the listening must be positive. On the water sailing opens a lot!
The sail offers a nice profile finesse and lift the board. Too bad the mat is so heavy and big diameter because all seems pretty light anyway.
The stability is surprisingly good even if it is not worth a GSR or Vector, it is very correct.
Perf side, it brings without any problem above the 30 knots and it even allows to overtake even if it is not its strong point.
She will logically more comfortable in low / medium range slalom 8 and small edges. Very comfortable in recovery / replacement.
This surface is versatile foil / fin without problem. To do with 8.7.
Be careful, the border surface may interfere with banging in the water. I added two notches extension.

ned321
42 posts
16 Mar 2019 7:25PM
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To summarize, Bow compared to GSR and Vector.
-Much wider wind range
-VERY VERY fast in low till medium wind range
-Less fast than GSR and even Vector in upper wind range
-Light in the hands, and very stable over the whole wind range
-Less tiring than regular sails
-Very easy to rig

Based on this, a very good choice for low till medium wind, for freeracer. For slalom and GPS competition, GSR is better.

Nubie
56 posts
17 Mar 2019 4:16AM
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Select to expand quote
ned321 said..
To summarize, Bow compared to GSR and Vector.
-Much wider wind range
-VERY VERY fast in low till medium wind range
-Less fast than GSR and even Vector in upper wind range
-Light in the hands, and very stable over the whole wind range
-Less tiring than regular sails
-Very easy to rig

Based on this, a very good choice for low till medium wind, for freeracer. For slalom and GPS competition, GSR is better.





So conclusion is that this concept will not replace classic sail in future.

What I could see in past neither "revolution sail" didnt make it,because all these attepmts did not keep producing in long run.
They appear but quickly disappear from the scene.

all wing sails,reflex,shear tip,simmer cyber ,total flow..etc

ned321
42 posts
17 Mar 2019 4:03PM
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Select to expand quote
Nubie said..

ned321 said..
To summarize, Bow compared to GSR and Vector.
-Much wider wind range
-VERY VERY fast in low till medium wind range
-Less fast than GSR and even Vector in upper wind range
-Light in the hands, and very stable over the whole wind range
-Less tiring than regular sails
-Very easy to rig

Based on this, a very good choice for low till medium wind, for freeracer. For slalom and GPS competition, GSR is better.






So conclusion is that this concept will not replace classic sail in future.

What I could see in past neither "revolution sail" didnt make it,because all these attepmts did not keep producing in long run.
They appear but quickly disappear from the scene.

all wing sails,reflex,shear tip,simmer cyber ,total flow..etc


I don't agree with that conclusion.
I think that for the majority of the blast-back-and-forth windsurfers the Bow is far superior to a traditional sail.
-You can cover the windrange of 2 traditional sails with 1 Bow.
-Need to rig down or up less often.
-Faster 80% of the time because wider sweet spot
-Easier gybing
-Easier rigging

Only major risk I see: like we say in dutch "what the farmer doesn't know, he does not eat".
They need to find a way to get lots of consumers find out in practice what the difference is. Put them at test centers.

Nubie
56 posts
17 Mar 2019 4:29PM
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Select to expand quote
ned321 said..


Nubie said..



ned321 said..
To summarize, Bow compared to GSR and Vector.
-Much wider wind range
-VERY VERY fast in low till medium wind range
-Less fast than GSR and even Vector in upper wind range
-Light in the hands, and very stable over the whole wind range
-Less tiring than regular sails
-Very easy to rig

Based on this, a very good choice for low till medium wind, for freeracer. For slalom and GPS competition, GSR is better.








So conclusion is that this concept will not replace classic sail in future.

What I could see in past neither "revolution sail" didnt make it,because all these attepmts did not keep producing in long run.
They appear but quickly disappear from the scene.

all wing sails,reflex,shear tip,simmer cyber ,total flow..etc




I don't agree with that conclusion.
I think that for the majority of the blast-back-and-forth windsurfers the Bow is far superior to a traditional sail.
-You can cover the windrange of 2 traditional sails with 1 Bow.
-Need to rig down or up less often.
-Faster 80% of the time because wider sweet spot
-Easier gybing
-Easier rigging

Only major risk I see: like we say in dutch "what the farmer doesn't know, he does not eat".
They need to find a way to get lots of consumers find out in practice what the difference is. Put them at test centers.



I do not understand how super flexy BOW mast can open leech roach more then classic loose leech sail.
Mast is stiffer then any floppy monofilm..

Even bow mast is very flexy I dont understand how they succed such a twist if sail dont have loose leach at all?

Ben1973
237 posts
17 Mar 2019 9:25PM
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It's not twisting, the top of the sail is bending away

sausage
QLD, 4800 posts
18 Mar 2019 4:10PM
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.............and just when all the sail manufacturers started going for CC masts. Now I have to throw all of them away and start again

Ben1973
237 posts
20 Mar 2019 3:28AM
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Can't see the point of the friction bearing, the mast is a round section so dos it really need to rotate? Only reason I can see you would need one is if the cams where really really sticky

olskool
QLD, 1410 posts
20 Mar 2019 8:44AM
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^^ Guess the bearing is to 'rotate' mast coz its bent so far n in the luff sleeve. Itll never 'spin' inside the sleeve with all the friction from luff material on it. So the whole top section must rotate.

choco
SA, 3437 posts
13 Apr 2019 12:31PM
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I wonder how long the top part of the luff lasts with all the pressure of feeding in the mast.

Ben1973
237 posts
13 Apr 2019 9:38PM
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If you wanted this to be really cool what you would have to do is make lots of different stiffness top sections so you could tune the amount the sail flexed away according to rider weight/preferences. For example a heavier rider would need a stiffer top or instead of changing down you could fit a softer top.

Jetlag
NSW, 91 posts
14 Apr 2019 6:04PM
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Select to expand quote
choco said..
I wonder how long the top part of the luff lasts with all the pressure of feeding in the mast.


Yeah, I wondered that too. I've had to re-do the stitching on my GSR 7.1 2017 as the mast feeding action wore it away.



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"Gunsails BOW" started by Nubie