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 Post subject: luff track on comp tip
PostPosted: Sun Aug 23, 2015 8:21 pm 
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I noticed a problem with my 83 project boat. The base of the luff track on the comp tip side doesn't line up very well with the base on the aluminum side of my H16 mast.

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The base of the luff track on the comp tip side is raised about an 1/8" over the aluminum side of the luff track. There's also a 1/2" gap between the two luff tracks. I can slide the luff track back down to deal with the gap, but then the uneven bases really seem to create a barrier. How do I deal with these two issues? They make raising the mainsail much harder if I have any tension on the battens, and it seems like it's damaging the sail at the luff rope.

You can see some bondo underneath the joint of the luff track. Is excess Bondo underneath the luff track forcing it too high? Or is the Bondo only on the sides of the luff track?

Pat


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PostPosted: Sun Aug 23, 2015 9:03 pm 
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The gap between the aluminum and Comptip track isn't that big of a deal, but the Comptip track should align with the aluminum track.

You need to clean out all the Bondo that's keeping the track from lying flush.


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PostPosted: Mon Aug 24, 2015 1:20 pm 
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You should also bevel the edges of the plastic and aluminum tracks at the transition so the sail doesn't hang up on the edges.

sm


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PostPosted: Tue Aug 25, 2015 8:28 pm 
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Does removing the excess Bondo require removing the luff track? Not sure if there's Bondo beneath the track too. From what I can see, I don't get the purpose of the Bondo. Is it to shim up the comp tip luff track so it's even with the aluminum track?

Pat


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PostPosted: Tue Aug 25, 2015 8:44 pm 
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Pat R wrote:
Does removing the excess Bondo require removing the luff track? Not sure if there's Bondo beneath the track too. From what I can see, I don't get the purpose of the Bondo. Is it to shim up the comp tip luff track so it's even with the aluminum track?

Pat


The short answer is that there shouldn't be any Bondo there at all.

Somebody did a messy installation job.


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PostPosted: Wed Aug 26, 2015 10:26 pm 
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Thanks MBounds for the info. Are you saying that the Bondo serves a purpose for the comp tip install, but it was sloppy work that got it near the luff track? If that's true, I can remove the Bondo under and right around the luff track, and it shouldn't cause problems as long as I work gently around the comp tip connection. Or am I misunderstanding something?

Pat


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PostPosted: Thu Aug 27, 2015 11:39 am 
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I believe what Matt meant was that there should be no bondo whatsoever. The comptip should just be riveted right to the mast. Perhaps the comptip/mast ended up leaking and they tried to seal it using bondo, or they were worried about it and used bondo to prevent it from leaking. Or perhaps they just wanted to make sure it was really secure.


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PostPosted: Thu Aug 27, 2015 2:16 pm 
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The DIY method of Comptip installation uses Bondo (as recommended by Matt Miller), but there should be none outside the joint itself. This is just a sloppy installation.


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PostPosted: Thu Aug 27, 2015 2:22 pm 
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It is somewhat common from some glue / Bondo to squeeze out and end up in the luff groove. I always check that during install and when done properly the tracks should be masked off to prevent it.

The only concern I'd have is if they did a repair on the CompTip track groove... That would be a different issue.

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Hobie Cat USA


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PostPosted: Thu Aug 27, 2015 8:36 pm 
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What kind of repair would you do to the comp tip track with Bondo?


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PostPosted: Sun Aug 30, 2015 4:29 pm 
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I cleaned up the Bondo around the Comptip luff track this weekend. You were right Matt Bounds, it was a messy job someone did and I removed globs that clearly served no purpose (like inside the aluminum track). I think that Matt Miller was also right that there may have been some other purpose the Bondo was intended to achieve, because the lip that holds the luff track had a number of chips. I think I gained maybe a 1/16" by removing the Bondo, but the Comptip luff track is still nearly 1/8" higher than the aluminum track. It's not just the base of the track, the Comptip luff track is noticeably higher on the outside too. Is there any way to get the whole Comptip luff track to sit and stay lower? That also may have been the original purpose of the fix, but I wouldn't think Bondo would work well in tension to pull the luff track down. I guess I can work to build out the lip (with Bondo!) to cause the luff track to sit lower. Or hold down the base of the Comptip luff track with epoxy. Any suggestions? Or is something fried that needs replacement?

Pat


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