Subject: Re: [harryproa] Schooner rig and VHF/AIS
From: "a8b7k57g@protonmail.com [harryproa]" <harryproa@yahoogroups.com.au>
Date: 4/17/2020, 9:54 AM
To: "harryproa@yahoogroups.com.au" <harryproa@yahoogroups.com.au>
Reply-to:
harryproa@yahoogroups.com.au

 


If not, build 5. 5th is the gin pole and a spare?

  Nice use of materials, pieces, and budget!

Thanks!

  Though since I'm personally sold on a lifting mast instead of a gin pole, I'm not sure it would work for me.

I see. I like the non rotating mast and sail system Rob has sketched out. I hope to build it on an E25 and see how it works.

If we assume two piece masts, could they be 4 clones? Like do they HAVE to be top/bottom?

  I think they might have to be top and bottom.  There's much more stress at the bottom, so it needs to be thicker/wider/heavier.  But we don't want the extra weight up high:

    - It's extra weight and cost
    - It adds to heeling moment
    - It helps to have thinner/flexible tops to bend in gusts


  Another limiting factor is what we can actually fit into the leeward hull and then remove.  A 25' half mast would probably need to be fit inside the hull.

What are you assuming to be the mast height? I could not find it, but, is 65' a good guess? That becomes 70',including bury, and two sections, 10% overlap, makes 2@ 38.5' poles, right?

I am not really sure there will be much extra weight. They are carbon fiber tubes. If i have to choose between saving weight on the mast head, and building multiple copies of the same thing,  choose copies, i guess. I am.not sure.

  That said, even the three-part lifting mast in 8'-6" sections might not go in and out of the hatches on the leeward hull as they're currently positioned. 

  But I'm reasonably confident something of that length could be feasible.

         - Mike 

It is a glass boat. I am sure something could be rigged



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