Looking for a 3 foot piece of N 5.8 mast

Bruce:

I don't have piece of a mast but I do have a good used NACRA 5.8 mast.

Mark A. Michaelsen ~MM~

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Mark Michaelsen

www.sailingproshop.com

(800) 354-7245

Are you talking about putting an internal sleeve inside of a broken mast for a splice?

Did you lose much length when you trimmed the ends square?

Are you going to replace the lost length?

In order to put a 5.8 section inside of a 5.8 section, you will have to cut the sail track off and do a lot of bending to make it fit.

If the break occured at the speader, you don't need a 5.8 mast section for an internal splice. A lighter, smaller section such as a 5.5 or J22 mast section will fit closer and be easier to bend.

Yes, I have spliced and extended masts.

Yo Mark,

You know I have calling you about this for about a year. It is for the 5.8 that I bought the starboard hull from you a few years back,..remember?

I know a new mast is $895 fob Calif,....it is the shipping to the islands that get me.

thanks anyway Mark.

Bruce

Tell me more about your idea.

I was proposing to cut the sail sleeve out,....the do an internal sleeve with countersink rivets

The mast broke in a hurricane 2 years ago,...I am finaly getting around to this project.

I will lose 2-3 inches after square the ends. It was a 100% break.

The boat will be a recreational boat,..not raced.

Ideas,...comments,...suggestoins. Money is a object to..

Bruce

St. Croix

Bob I have absolutely no experience but once in a while I have a good idea.

Here is my probably bad idea.

Cut your mast square where it is broke so that the two pieces can fit together.

Make a sleave out of a section of 2-3 foot of the same type of mast. Jigsaw out the track of the 2-3 foot section. Squeeze the section together a little with a rubber mallet then rivit it in place.

You now have a slightly shorter mast. You can recover the length of mast by sleeving in a section at the very bottom of the mast where it won't make any difference with the same meathod I described above.

It sounds easy enough if you could get a few feet of the same type of 5.8 mast.

Good luck,

Mike Hill

Hi Bruce,

The big issue is the location of the splice. If it is in part of the mast that requires a lot of bending strength, then it would need to be as strong as the original. If it is an area subject to mostly compression loading, it is much easier(safer?) to splice.

The splice piece needs to fit tightly against the inside surface of the mast. This is not a easy as it sounds. The 5.8 mast section is very heavy and does not bend easily.

They have a similar problem in the mfg of aluminum planes. They predrill all the holes and then use clamping bolts to hold everything into position while they install the permanent rivets, one at a time.

You should install the splice piece in one side of the mast first. Fasten the leading edge first. You can drill extra holes and use long 3/16

screws to pull the piece tight against the mast while you rivet it.

This should help mold the piece to the proper shape. Use plenty of rivets, monel preferably. DO NOT USE COUNTERSUNK RIVETS. The splice rivets will be subject to a lot of shear forces.

Before you install the

blind" side, stuff a piece of foam into the mast at the joint. This will provide backing for the silicon sealant.

REMEMBER! movement is your enemy. Use plenty of rivets and sealant.

Yo Bruce:

I finally have a good used mast for you.

If you are interested let me know!

MM

www.sailingproshop.com

Mark Michaelsen

www.sailingproshop.com

(800) 354-7245

Let me add:

Look at lighter masts for material for the splice J22, H17 etc. Since you are going to have to cut the sail track off it only needs to be roughly the right shape.

I would bond (glue) the splice to the mast. The best in order would be aluminum filled epoxy, 1 part polyurethane metal adhesive, 3m 5200.