A Photo & Discussion Forum for Wharram Design Enthusiasts
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Hello Gerry, I wouldn't have a clue how much to build, all depends on how much you can get the materials for. Not even sure of the dimensions of a T38 mast.
I would think carefully about coating with fibreglass though as fresh water getting trapped under the cloth will cause rot very quickly. You are better off using some very good quality Oregon or similar and keeping it well maintained, with paint, oil, or varnish.
A construction like this is very strong, flexible and light.
I have an aluminium mast with stainless rigging.
You could use stainless steel or dyneema for rigging. Galvanised wire is a cheep option also, not so popular these days though.
Yep. Two in fact,the first one was made with uncured timber,this was because I had no clue as to nature of the wood. Second mast i built out of Hoop pine.I see you are in qld, i am on the sunshinecoast,pm me if you are nearby and we can talk about sticks.
I'd go with the bird's mouth method, eight sides. The V notch is 45º on both sides so easy to cut, very easy to make tapered mast, and above all it's self jigging. This means you just have to press the staves and they'll go in together and the mast will be usually straight. You can use plastic precincts to hold the mast tight enough while glueing (epoxy of course), real easy.
My advice is to put some tape in the V notches of two opposing staves (don't glue them), so you will get two half masts. Then you can do internal cleanup, put some extra wood where needed, and fix a plastic tube to get cables up the mast. Then you glue the half masts together.
To get stave dimensions you can find a calculator here http://www.duckworksmagazine.com/04/s/articles/birdsmouth/
Good share Ricardo. Tane I sent you a p.m. mate.
I'd second the bird's mouth suggestion - worked nicely for me, albeit on a smaller boat. Some photos of the process around here if they are of interest.