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Forums > Windsurfing General

Odd boom

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Created by Ben1973 > 9 months ago, 9 Nov 2017
Ben1973
993 posts
9 Nov 2017 9:55AM
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Subsonic
WA, 3207 posts
9 Nov 2017 10:09AM
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I noticed that too. Trying to decrease distortion in the boom/rig?

Ben1973
993 posts
9 Nov 2017 10:15AM
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Trying to get further away from the sail? More leverage?
stranger still just noticed no boom on the other side

sailquik
VIC, 6150 posts
9 Nov 2017 1:43PM
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yes. It is a one sided boom. Patrick was making them when we were there in 2013 for a few of the sailors. The idea is to eliminate the drag and turbulance on the low pressure side of the sail.

Luderitz is strictly one way, and get a trailer ride back, so it makes sense to try it.

They were basically just cutting up a carbon boom and glueing it together again on one side. The extra piece from the lee side is put inside the normal side to make it stiff and strong. Boom width from the sail is the same. If I go back there again, I will try to do the same with an alloy boom 'cuse I'm cheap.

Here is one he made for Karin.





Tardy
5102 posts
9 Nov 2017 11:21AM
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In that case ,you only need two foot straps ...what else can be eliminated .

Sparky
WA, 1121 posts
9 Nov 2017 12:32PM
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Yes, they have only two straps, they thought about that! And only half a fin! Asymmetrical fins.

WaynoB
NSW, 393 posts
9 Nov 2017 5:41PM
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Select to expand quote
Tardy said..
In that case ,you only need two foot straps ...what else can be eliminated .


Gybing......

Tardy
5102 posts
9 Nov 2017 5:34PM
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Your harness lines would last twice as long too.

I'm pretty green when it comes to speed sailing.
What s the difference. Between a speed sail and a race sail .
cams, battens ,shape ..??

BSN101
WA, 2329 posts
9 Nov 2017 7:19PM
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Select to expand quote
Sparky said..
Yes, they have only two straps, they thought about that! And only half a fin! Asymmetrical fins.


and the water is half a meter deep.

Spotty
VIC, 1619 posts
9 Nov 2017 11:05PM
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Select to expand quote
Tardy said..
Your harness lines would last twice as long too.

I'm pretty green when it comes to speed sailing.
What s the difference. Between a speed sail and a race sail .
cams, battens ,shape ..??


nothing it is which ever one you can sail faster on you don't need cams to do 45knots, but it sure helps if you want to average 45 over 500m.

Slalom, Speed, Race, the shape/profile can be tuned to varying degree's just by tuning battens, cam spacers. Rotation not important if you only have half a boom and gybing not important but a more locked in stable shape is.

Select to expand quote
Tardy said..
In that case ,you only need two foot straps ...what else can be eliminated .


...sadly not the cost of entering/logistics to get there from afar, was worth it, good times,... though the wind was lacking in 2013.

olskool
QLD, 2455 posts
10 Nov 2017 1:53AM
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Select to expand quote
WaynoB said..

Tardy said..
In that case ,you only need two foot straps ...what else can be eliminated .



Gybing......


One way pass, then drive back. No gybe.

Capie
45 posts
10 Nov 2017 3:47PM
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The one-sided boom is actually more about allowing the sail to breathe than the turbulence. They have such deep profiles on the speed sails that it would touch the other side of the boom.

Bjorn's boom was made by Cape Dr. in Cape Town.

sboardcrazy
NSW, 8072 posts
11 Nov 2017 1:34PM
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I heard one of them say they wouldn't want to get their arm caught in there and then catapult..
Just one of many videos..
windsurfing.tv/video/part-2-idiots-guide-to-speed-sailing/

choco
SA, 4080 posts
11 Nov 2017 3:46PM
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Select to expand quote
Capie said..
The one-sided boom is actually more about allowing the sail to breathe than the turbulence. They have such deep profiles on the speed sails that it would touch the other side of the boom.

Bjorn's boom was made by Cape Dr. in Cape Town.


build a wider boom

Trousers
SA, 565 posts
12 Nov 2017 11:06AM
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In the first few minutes of this clip Bjorn claims asymmetrical booms minimise air flow (laminar?) disruption on the lee side of the foil.




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Forums > Windsurfing General


"Odd boom" started by Ben1973