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Boom Sections? #230728
04/04/11 11:58 AM
04/04/11 11:58 AM
Joined: Jul 2001
Posts: 1,197
Vancouver, BC
Tornado Offline OP
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Tornado  Offline OP
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Vancouver, BC
Got a bud here in Vancouver area that needs to build a new boom for his Tornado. He is unable to find the usual sections that are found on Tornado and most other beachcats (Tigers/H20/TheMightyHobie18/Nacras)...and he is a machinist with access to lots of sources. The stock Marstrom section will be $500+ once shipped here from Sweden.

He needs the square or rectangular section, not the circular one since he will be rigging an internal main sheet system.
Does anyone know where Hobie/Performace etc get their sections?

Thanks for any pointers...

Mike.


Mike Dobbs
Tornado CAN 99 "Full Tilt"
-- Have You Seen This? --
Re: Boom Sections? [Re: Tornado] #230730
04/04/11 12:24 PM
04/04/11 12:24 PM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

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South Carolina
How long does it need to be? You can get a 2" x 4" x 6' extrusion at McMaster.com for about $65 (don't know if they ship to Canuk-land though).



Jake Kohl
Re: Boom Sections? [Re: Jake] #230731
04/04/11 12:28 PM
04/04/11 12:28 PM
Joined: Jul 2001
Posts: 1,197
Vancouver, BC
Tornado Offline OP
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Tornado  Offline OP
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It's closer to 8' I believe...but the issue was wall thickness...needs to be something like 1/16"...typically you can find 1/8" readily. That's double the weight.


Mike Dobbs
Tornado CAN 99 "Full Tilt"
Re: Boom Sections? [Re: Tornado] #230732
04/04/11 01:47 PM
04/04/11 01:47 PM
Joined: Feb 2005
Posts: 4,118
Northfield Mn
Karl_Brogger Offline
Carpal Tunnel
Karl_Brogger  Offline
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Northfield Mn
I20 boom works with little modification, I think. I don't remember who I heard say that.


I'm boatless.
Re: Boom Sections? [Re: Tornado] #230736
04/04/11 05:08 PM
04/04/11 05:08 PM
Joined: Jun 2002
Posts: 1,658
Florida Suncoast, Dunedin Caus...
catman Offline
Pooh-Bah
catman  Offline
Pooh-Bah

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Posts: 1,658
Florida Suncoast, Dunedin Caus...
The Mystere boom is the old sailcraft section. Hobie Gary was parting out his boat and may have it still. I don't think it's 1/16" though.


Have Fun
Re: Boom Sections? [Re: Karl_Brogger] #230738
04/04/11 05:41 PM
04/04/11 05:41 PM
Joined: Sep 2002
Posts: 3,222
Roanoke Island ,N.C.
Team_Cat_Fever Offline
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Team_Cat_Fever  Offline
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Roanoke Island ,N.C.
Originally Posted by Karl_Brogger
I20 boom works with little modification, I think. I don't remember who I heard say that.


It would have to be the old style N-20/P-19 boom as the new N/I 20 booms are a round extrusion.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: Boom Sections? [Re: Tornado] #230751
04/05/11 09:16 AM
04/05/11 09:16 AM
Joined: Jun 2001
Posts: 778
Houston
carlbohannon Offline
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carlbohannon  Offline
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Houston
This is not the first time I have seen this issue. I think the Marstrom boom is from a Spar builder. I did a quick check through work and did not find any tubing in your size with a wall less than 1/8. All the tubing I saw (6061, 6063, and 2000 series) appears to be from 1 supplier. My source had an interesting comment. He said they would start looking at surplus suppliers, MARINE SUPPLIERs, and the last the MARINE MAKERS in Austrailia and France. I checked and Sparcraft has some rectangular'ish sections stock. I know this does help when you are trying to keep the price down.

Re: Boom Sections? [Re: carlbohannon] #230768
04/05/11 12:52 PM
04/05/11 12:52 PM
Joined: Jul 2001
Posts: 1,197
Vancouver, BC
Tornado Offline OP
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Tornado  Offline OP
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Posts: 1,197
Vancouver, BC
The Marstrom section is a strange fish...elongated rectangluar-ish...but with different top/bottom shapes. top side is near right-angled, while bottom side is much more radiused.
My friend is not hung up on getting a Marstrom section, though that would be great.

Mike.


Mike Dobbs
Tornado CAN 99 "Full Tilt"
Re: Boom Sections? [Re: Tornado] #230819
04/06/11 08:49 AM
04/06/11 08:49 AM
Joined: Jun 2001
Posts: 778
Houston
carlbohannon Offline
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carlbohannon  Offline
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Posts: 778
Houston
I am not looking at a Marstrom extrusion, I am just looking for an extrusion with a 1/16" wall. It's very hard to find a stock extrusion even close to Marstroms. There is just not much of a demand for al, where you are weight sensitive. Most people are going to carbon so they only sell the thicker wall al extrusions. There are plenty of places that make al tubing (Easton, Reynolds, etc) but it is mostly on order and per spec.

This search was interesting to me, because I found I can buy hydroformed al tubing whose strength approaches cold forged al. I am not sure what I will do with this information, but itís cool.

Re: Boom Sections? [Re: carlbohannon] #230820
04/06/11 09:22 AM
04/06/11 09:22 AM
Joined: Jul 2008
Posts: 129
Austin, TX
BoK Offline
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BoK  Offline
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Austin, TX
I'm thinking you could find what you need here....

http://www.metricmetal.com/


Bo Kersey
Corsair 31-1D 276
Re: Boom Sections? [Re: BoK] #230879
04/07/11 08:52 AM
04/07/11 08:52 AM
Joined: Jun 2001
Posts: 778
Houston
carlbohannon Offline
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carlbohannon  Offline
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Joined: Jun 2001
Posts: 778
Houston
Thank You for the link.


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