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PostPosted: Sun Jan 05, 2014 6:17 pm 
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Joined: Tue Jul 13, 2010 10:17 pm
Posts: 29
Location: Jerrabomberra, New South Wales, Australia
Mine is worn too, not particularly phased about it though.


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PostPosted: Mon Apr 07, 2014 5:08 am 
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Joined: Sat Nov 05, 2011 1:58 am
Posts: 1244
Location: Forster, NSW, Australia
I have carried out extensive investigation regarding the relationship between wear on the top bearing plate and the other components.

Please let us be 100% clear on this... The mast bearing plate (and the ring it is mounted in) IS NOT DESIGNED TO TAKE THE WEIGHT OF THE MAST. Even a cursory look would confirm that no engineer would design a system where a weight-bearing ring is only supported on one side. The bearing plate(s) are there solely to support the 24 delrin balls with HORIZONTAL loads.

As an aside, I wonder if this might have been an issue with those very few crossbars where the weld holding the ring was showing cracks....

So if your top bearing plate looks like this below, go straight to your Hobie dealer, as this is a symptom of a problem. Remember also, that the V2 mast receiver/v brace assembly cannot be adjusted by more than one or two milimetres (basically be distorting the components), unlike the earlier versions. The fix might need a new bottom half mast, or a longer pin in the bottom of the mast receiver.
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PostPosted: Mon Apr 07, 2014 7:20 am 
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Joined: Tue Jul 19, 2005 6:29 pm
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Location: High Point, NC
Some of the evident wear in the photo is caused by the movement of the mast when being furled/unfurled owing to the generous clearance designed into that opening. Mine shows a bit of this, but perhaps not quite this much. No doubt too much of this sort of thing could result in damage.

Of course, it's certainly true that the pin/base at the bottom of the mast receptacle is intended to carry the weight/load of the mast and sail.

The reason you often see differences in the mast bearing plate to furling drum clearance is due to drums not always affixed in exactly the same place, and the fact that these plastic hulls are not exactly precision pieces. The height of your TI's deck may be, and probably is, different that height of my TI's deck. As Tony said, the V-truss adjustment only affects mast base top height by distorting the otherwise natural position of the hull/components. It wasn't designed to correct terribly ill-fitting parts and pieces.


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PostPosted: Mon Apr 07, 2014 8:40 am 
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Joined: Sat Nov 05, 2011 1:58 am
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Location: Forster, NSW, Australia
The owner of that AI had stated that he had only used it a few times, so I therefore assumed this was a serious case of incorrect distance between furling drum and bottom pin, so the wear was much more than the odd scrape.

Yes Tom, the unfortunate thing is that some dealers did not seem to be aware of the existence of the V2 mast assembly, which is effectively a single unit once the two bolts through the crossbar are done up. This was a running change to AIs (and I believe OEM for TIs from the outset), and only the V1 assemblies can adjust the clearance via the turnbuckles.

Hopefully word will get out to all dealers so users are not cast aside with incorrect advice to "Adjust the turnbuckles" when the assembly is a V2.

I believe the Aussie dealers are now up to speed, and I assume those elsewhere will be soon, if not already.


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