Subject: Re: [harryproa] telescoping mast
From: "Rob Denney" <>
Date: 12/30/2007, 9:18 AM

On Dec 30, 2007 1:28 PM, captian_rapscallion
<> wrote:

> I have several questions.
Keep 'em coming!
> Is the mast free standing?
> Is the mast keel stepped?
Yes, with a UHMPWE plastic bearing on the keel and another on the deck.
> Is the section wing shaped?
Yes, a shortened Clark Y section, as per Tom Speer's logic.
> Is the mast metal or composite?
Carbon/epoxy infused in a female mould, each piece is built in 2
halves, the lower piece also has a sheer web.
> have you built a prototype?
No. The 15m one will be the first. I did not think the loads and
controls would scale up very accurately so did niot build a small one
first. As it is for me, it is a risk I am prepared to take.



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