For many years I have been collecting mast building websites in my computer favorite - I am more than happy to share some of them related to carbon masts - here are some that may help you with your issue:

 

This one is my favorite one and will explain the wax methode

http://www.lmorocz. com/BoatBuilding /mast01.htm

 

The others are also good:

 

http://www.sailings ource.com/ cherub/masts. htm#design

or this one

http://bateau2. com/content/ view/116/ 28/

or this one

 

http://www.diybob. com/coldmoulded. htm

 

or this one

http://www.eltoroyr a.org/carbon_ mast.htm

 

This one show you how to make a free standing mast w/o carbon

http://sponbergyach tdesign.com/ Nai'a.htm

 

 

 

 

----- Original Message ----
From: Doug Haines <doha720@yahoo. co.uk>
To: harryproa@yahoogrou ps.com.au
Sent: Thursday, January 25, 2007 10:50:10 PM
Subject: Re: [harryproa] mast pipe

G'Day Phil Keck,

 

  Hi, I built and am still building as it needs improving an elemenatrry, and have a query as well on the plastic pipe. This is also used for tiller extensions and I used it as a mold for part of my masts.

  My plans combine the pipe with reinforcing of glass for strength, so the type of pipe is not important, though I beleive you can get thicker stronger pipe you'd save weight by getting thinnest pipe with extra glass for strength. The pipe provides a mold basically and a nice smoothe inside surface for rotation of the mast.

 

 However for say the tiller extensions and what I plan to do for the sun shade frame, I would like to wrap the glass, or better carbon, round pipe, then release the two parts to give a better strength to weight ratio. Even a small thing like tiller extensions get quite heavy without some better building.

I do not know how to release the two - perhaps some one could advise.

Eg. a mast made spinning carbon on a , is it called a madrel or something? must use some release wax or something. I read abot carbon compression or something when you bang on some carbon, it was in a windsurfing mast are when handling not to drop it on the ground literature.

 

Also Phil Keck, the Kiri is so weak that the glue is stronger so I think the toungue and groove you're talking about will not do much. You couldn't fit it in anyway as you go round the corners they meet on an angle - hence requiring narrow strips.

 

Doug

 

 

pkeck2 <pkeck2@yahoo. com> wrote:

On this page:

http://harryproa. com/Elementarry/ BuildingPhotos_ 2.htm

Are the mast pipes just made of regular PVC pipe?

Thanks,
Phil

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