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how to tighten/lock a carbon boom?
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LakeSurf



Joined: 01 Jul 2015
Posts: 81

PostPosted: Fri Jun 17, 2016 6:17 pm    Post subject: how to tighten/lock a carbon boom? Reply with quote

I bought a used carbon boom and I'll tighten the knobs but it still unlocks under a lot of tension when I'm out on the water. Is there a trick to it?
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dllee



Joined: 03 Jul 2009
Posts: 4617
Location: East Bay

PostPosted: Fri Jun 17, 2016 7:01 pm    Post subject: Reply with quote

Booms of different manufacturer's use DIFFERENT locking systems.
What company boom?
If it's a Fiberspar, you can use electrical tape to go over the locking fingers in one layer, then just tighten down at it won't slip.
Or buy the Fiberspar locking system kit.
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swchandler



Joined: 08 Nov 1993
Posts: 9517

PostPosted: Fri Jun 17, 2016 7:02 pm    Post subject: Reply with quote

"Tighten the knobs"


What's that supposed to mean? What brand of boom did you buy?

Most booms these days have clips that pop in or out to adjust the length of the extension. The clips have integral stainless steel male components that snap into the holes drilled in extension arms.

Years ago, some brands, like Neil Pryde, had twisting plastic pieces that would interlock to set the extension length. Over time the the interlocking components would wear out requiring replacement. If you have that type, it might be difficult to find the replacement parts today.
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LakeSurf



Joined: 01 Jul 2015
Posts: 81

PostPosted: Fri Jun 17, 2016 9:18 pm    Post subject: Reply with quote

It is a Neil Pryde so maybe it's worn. My Fiberspar boom has the same setup too but I haven't used it yet.

Here's a picture:



I didn't pay much for the booms so maybe I'll try to come up with a hack to help get it to stay
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dcharlton



Joined: 24 Apr 2002
Posts: 384

PostPosted: Sat Jun 18, 2016 7:42 am    Post subject: Reply with quote

I went through the same frustration after buying a used carbon boom.

I ultimately just went back to a new aluminum boom as I've never had a locking problem with them, they're reasonably priced and even when the carbon boom was working, I just didn't feel that big a difference.

The older I get in this sport, the less inclined I am to risk a good session on unreliable gear. I HATE spending money on this stuff, but the last thing I need after a 3 week no wind hiatus is to have something go wrong and wreck the session.

DC
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dllee



Joined: 03 Jul 2009
Posts: 4617
Location: East Bay

PostPosted: Sat Jun 18, 2016 1:44 pm    Post subject: Reply with quote

It's a Fiberspar, made for Neil Pryde.
Just slide the top tightener off, and you see fingers that lock onto the grooves. Using electrical tape, wrap one layer over the fingers, so when you tighten the outer turning knob, it squeezes on the tape, which adds extra pressure to the fingers locking into the groove.
Or buy the Fiberspar adjust collar kit.
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LakeSurf



Joined: 01 Jul 2015
Posts: 81

PostPosted: Sat Jun 18, 2016 7:53 pm    Post subject: Reply with quote

zirtaeb wrote:
It's a Fiberspar, made for Neil Pryde.
Just slide the top tightener off, and you see fingers that lock onto the grooves. Using electrical tape, wrap one layer over the fingers, so when you tighten the outer turning knob, it squeezes on the tape, which adds extra pressure to the fingers locking into the groove.
Or buy the Fiberspar adjust collar kit.


Perfect, thanks!

dcharlton wrote:
the less inclined I am to risk a good session on unreliable gear. I HATE spending money on this stuff, but the last thing I need after a 3 week no wind hiatus is to have something go wrong and wreck the session.



I hear ya. I'm just getting into it, but hating even just wasting time adjusting things. I'm trying to keep the cost down until I get a better feel for everything but will get at least half decent gear when I know what will be best for the long haul.
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ctuna



Joined: 27 Jun 1995
Posts: 893
Location: Santa Cruz Ca

PostPosted: Wed Jun 22, 2016 12:21 am    Post subject: Those fiberspar twist locks always wear out. Reply with quote

Those fiberspar twist locks always wear out.
You can buy the kit and replace them but it will happen
again . That is one of the reasons I stopped buying them.
They used to be the best carbon boom on the market when
carbon booms were a new thing.
The kit used to be something like 25 to 35 bucks.
Usually the will last a season about 60 to 90 sessions.
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spennie



Joined: 13 Oct 1995
Posts: 964
Location: Thousand Oaks, CA

PostPosted: Thu Jun 23, 2016 12:42 pm    Post subject: Reply with quote

If you're very careful when adjusting/locking the boom the locks will be fine. As soon as it slips, like you say yours did, it's time to replace the locks. I found them in 30 seconds: http://www.windpowerwindsurfing.com/shop/index.php?main_page=product_info&products_id=5357
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DanWeiss



Joined: 24 Jun 2008
Posts: 2277
Location: Connecticut, USA

PostPosted: Mon Jun 27, 2016 1:43 pm    Post subject: Reply with quote

The Fiberspar Twist-loc collars are specifically designed to accommodate normal wear from friction and sand, etc. What many seem not to understand is that the Twist-loc collars should be tightened only enough to prevent the boom from slipping when pulled by one hand. The fingers on the portion of the Posi-loc fit snugly into the grooves of the back end extension tubes. Adding more tension in with the collar does not achieve more bite on the rear end than just enough tension.

Note that the Twist-loc collars included indexed steps within the slot. The steps exist to accommodate normal wear of the collars. If the boom slips on the lowest step, move to the next step. Cranking on the Twist-loc collars only wears out the higher steps without adding any greater grip to the fingers.

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