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20 comp tip loose
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Author:  McNeir Team [ Sat Apr 09, 2011 7:30 pm ]
Post subject:  20 comp tip loose

getting the boat out of the warehouse I noticed the comp. tip had a little movement. not much. Do you think it is something that should be taken off and rerivited?

Author:  srm [ Sun Apr 10, 2011 3:24 pm ]
Post subject:  Re: 20 comp tip loose

I think that if you're able to move the comptip by hand, then it will probably move ten times as far when you pull in hard on your 7:1 mainsheet and 8:1 downhaul. So yes, I would fix it. Probably needs some putty inside the joint.

sm

Author:  McNeir Team [ Sun Apr 10, 2011 5:53 pm ]
Post subject:  Re: 20 comp tip loose

took the mast tang off and the movement didn't get any worse. I have another question about the rivet caps that go in before the rivet. Is it for waterproofing or carbon to s.s connection? I forgot to mention 3 or 4 of the rivet had become loose. thanks for the info.

Author:  Hammond [ Sun Apr 10, 2011 10:31 pm ]
Post subject:  Re: 20 comp tip loose

My guess, it's broken inside the joint. I broke one about 2 inches inside the mast extrusion. Putty will not fix this. On mine, I pulled it out, chipped out the foam and glass, and seated a new tip. Good as new.

Author:  srm [ Mon Apr 11, 2011 9:26 am ]
Post subject:  Re: 20 comp tip loose

My understanding is that in cases of a loose fitting comptip, they would put putty (bondo) on the comptip ferrule prior to installing in order to fill the gap between the comptip ferrule and the aluminum extrusion. So that was my thought, maybe it loosened up over time and just needs some putty in the joint and then re-riveted. If the comptip is cracked, then definintely it needs to be replaced. In any case, there is something going on there and simply putting in new rivets is not likely to solve the problem.

You should put your hand on the joint while someone flexes the mast tip so you can try to determine the source of the movement.

The purpose of the rivet caps is to keep water out of the mast. They also provide a barrier between the stainless rivets and the aluminum mast extrusion. There is no carbon fiber in the comptip - it's fiberglass (carbon fiber is conductive and would totally defeat the purpose).

sm

Author:  fastcat [ Tue Apr 12, 2011 10:40 am ]
Post subject:  Re: 20 comp tip loose

You need to pull out the comptip and check it. If it is not damaged then you can re-seat it with Bondo (or similiar) and re-rivet (use casings, they are for a waterproof seal). If the comp tip is cracked or broken, then either replace it or try and fix by hollowing out foam and building up on inside of crack with fiberglass resin and fibers. Good luck.

Author:  McNeir Team [ Tue Apr 12, 2011 4:03 pm ]
Post subject:  Re: 20 comp tip loose

pulled tip off today and found no damage. it appeared to be set in a silicon or butyl chaulk. should I use a solid or a flexable adhesive?

Author:  McNeir Team [ Tue Apr 12, 2011 4:05 pm ]
Post subject:  Re: 20 comp tip loose

oh yea thanks for all of ya'lls replies.

Author:  mmiller [ Tue Apr 12, 2011 5:02 pm ]
Post subject:  Re: 20 comp tip loose

Solid... as mentioned, Bondo works well and is easy to work with. Has to be a hard shim / bond to hold it straight under heavy loads.

Author:  NAHCA555 [ Thu Apr 14, 2011 10:17 pm ]
Post subject:  Re: 20 comp tip SUN BAKED

Similar subject:

I have recently acquired a used H-20 and the comp tip is really sun baked... is this just cosmetic or does the glass get weakened by prolonged UV?

To make it look nice can I just paint it black again (not the plastic guide though)... and if I paint it what type is recommended?

Thx,

Brian

Author:  mmiller [ Tue Apr 26, 2011 9:21 am ]
Post subject:  Re: 20 comp tip loose

Engineers long ago mentioned Vinyl paint?

http://www.rustoleum.com/CBGProduct.asp?pid=117

Author:  Abraham Jones [ Mon Jul 28, 2014 10:44 pm ]
Post subject:  Re: 20 comp tip loose


Just to make sure I understand this. To fix a lose comp tip, I need to reseal it with Bondo and to do that I need to remove it from the mast and to do that I need to remove the mast tang.

Thanks,

Author:  srm [ Tue Jul 29, 2014 2:56 am ]
Post subject:  Re: 20 comp tip loose

You need to remove the mast tang and the rivets. The rivets go through the tang, through the aluminum extrusion, and through the comptip ferrule. Regarding Bondo, the stuff has a very short working time (or I should say, it can be tricky to dial in the working time). Unless you're really in a hurry to get the mast back on the water (like want to sail it the same day as you do the repair), you might want to consider using something with a longer pot life.

sm

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