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Attaching a lowers plate to a carbon mast

Printed From: Yachts and Yachting Online
Category: General
Forum Name: Repair & maintenance
Forum Discription: Questions & tips on the subject
Printed Date: 26 Jan 22 at 9:01pm
Software Version: Web Wiz Forums 9.665y -

Topic: Attaching a lowers plate to a carbon mast
Posted By: DaveT
Subject: Attaching a lowers plate to a carbon mast
Date Posted: 15 Mar 06 at 10:36pm

I've just got a second hand carbon mast for my IC, unfortunately its rigged for a strut not lowers, I need lowers because I've got a self tacking jib. I've got a lowers plate like this - showitem&pid=SRISP005  but what's the best way to attach it? If I use rivets, what type should I use?



IC GBR 245



Posted By: Olly4088
Date Posted: 16 Mar 06 at 7:45am


I'm not sure what you could use to attach it but I do know that you have to be careful what you do use as some metals have funny reactions to the carbon and will damage it


Phantom 1298

Posted By: Granite
Date Posted: 16 Mar 06 at 8:21am
Stainless steel rivets are probably the best bet, but you need a serious rivet gun to pull them.
They will discolour but generaly do not get any worse than that unless there is movement. Zinc chromate pase can help with this a bit but does not last long. the only way to avoid it is to ensure that the carbon can not touch the metal with a layer of epoxy.

You also need to know the thickness of the mast so you can pick the correct length of rivet.

If the mast is sleaved at that point it may be too thick for rivets in that case you can use self tapping screws. They are loaded in shear and work supprisingly well but the hole you drill must be exactly the right size for the screw if it is too small the laminate will crack

If it doesn't break it's too heavy; if it does it wasn't built right

Posted By: JimC
Date Posted: 16 Mar 06 at 9:07am
Don't use the plate is the simple answer. Use stainless steel D rings bandaged onto onto the spar with unidirectional carbon.

Posted By: Isis
Date Posted: 16 Mar 06 at 1:04pm
Id second Jims suggestion here


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