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Chinook mechanical joint failure
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wsurfn1426



Joined: 20 Mar 2004
Posts: 221

PostPosted: Sat Jan 04, 2020 4:38 pm    Post subject: Reply with quote

Novaan:

Thanks for posting about this. I windsurf with a single bolt tendon UJ, but use the mechanical for the foil board for easier coupling/uncoupling. I am not sure why this topic got off point, but if you have a recent Chinook mechanical UJ check those threaded ends. I initially did not, but mine were very easy to unthread when recently checked. Potential disaster averted with some red Loctite hopefully.
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NOVAAN



Joined: 28 Sep 1994
Posts: 1356

PostPosted: Sun Jan 05, 2020 11:00 am    Post subject: Reply with quote

Glad I saved you a potential swim or a lost rig.
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dllee



Joined: 03 Jul 2009
Posts: 4917
Location: East Bay

PostPosted: Sun Jan 05, 2020 11:41 am    Post subject: Reply with quote

My two have slight friction, so easy to tell if they get looser.
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killeen_john



Joined: 04 Aug 2006
Posts: 58

PostPosted: Sun Apr 26, 2020 8:57 am    Post subject: Reply with quote

Just noticed these from Chinook and looks like a neat blend of tendon and mechanical joint:

https://chinooksailing.com/collections/new-products/products/2-bolt-pro-flex-mast-base-us-base-cup

https://chinooksailing.com/collections/new-products/products/2-bolt-pro-flex-mast-base-euro-pin-ex



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manuel



Joined: 08 Oct 2007
Posts: 1085

PostPosted: Mon Apr 27, 2020 12:14 pm    Post subject: Reply with quote

Looks well done possibly extend life of tendon too.
Need to see what kind of wobble develops between top part and black plastic piece.

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dllee



Joined: 03 Jul 2009
Posts: 4917
Location: East Bay

PostPosted: Mon Apr 27, 2020 12:25 pm    Post subject: Reply with quote

Always wait a year before buying new ideas?
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grantmac017



Joined: 04 Aug 2016
Posts: 916

PostPosted: Mon Apr 27, 2020 8:55 pm    Post subject: Reply with quote

Hopefully they will sell just the top piece, last thing I need is another complete base.
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dhmark



Joined: 04 Sep 2007
Posts: 324

PostPosted: Tue Apr 28, 2020 6:26 am    Post subject: Reply with quote

That top black plastic piece is suspect. I’ve not been happy with some of Chinook’s switch to plastic over the years, eg boom pins, extension pins, boom collar material. Function has always been good.
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merriam2



Joined: 25 Oct 2013
Posts: 32

PostPosted: Tue Apr 28, 2020 11:23 am    Post subject: Reply with quote

dllee wrote:
Always wait a year before buying new ideas?


Often true, however in this case I'm willing to risk it. That looks like a great design, and if there were a problem discovered I'm confident Chinook will take care of it.
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