Vagabond 20 questions for Jacques

Sail Boats 15' and up. Please include the boat type in your question.
jacquesmm
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Re: Vagabond 20 questions for Jacques

Post by jacquesmm »

The profile manufacturer should supply the splice. The inside part will be made from the same extrusion but with a small slice cut out. I am surprised that he can't supply a full length.

As for the scale, it is simple if you stay with a uniform scale. Problems appear when you want to use different scales for different parts.


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Re: Vagabond 20 questions for Jacques

Post by Sarp »

I found another mast supplier and he suggested that the splice could be added as a taper piece at the top with 30-40cm overlap, adding 40cm to overall height(so one 7.5m piece + a 1.3m splice piece with 0.4m overlap). He also suggested that the splice could be done at the bottom as well close to boom with a 0.9m+7.5m 2 piece mast + a 3rd splice piece inside. Can these methods be an alternative to a splice at spreaders level + 2 piece mast (btw is it roughly around 3.4m from deck assuming 7% scaling above the boom level)?

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Re: Vagabond 20 questions for Jacques

Post by Jaysen »

What’s the objection to a one piece mast?
My already completed 'Lil Bit'. A Martens Goosen V12 set up to sail me to the fishing holes.
Currently working on making a Helms 24 our coastal cruiser.
Jaysen wrote: Mon Apr 29, 2019 3:44 pm I tried to say something but God thought I was wrong and filled my mouth with saltwater. I kept my pie hole shut after that.

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Re: Vagabond 20 questions for Jacques

Post by Sarp »

I talked with a few mast suppliers, some do not have anything smaller than a mast for a 9m size boat. The ones that make suitable profiles only have 7.5 or 8m length in stock. One said they could supply a 8.5 but then it would not be anodized. So, either it will be a splice at bottom (near boom), spreaders or top, or it will be an 8.0m instead of the scaled 8.4m. It is relatively easy to have a small piece splice (bottom or top), but a splice in the middle costs me double for the mast profile.

One supplier said they could have a short extension at bottom (around boom) and they can weld the alu splice profile to the bottom part with enough extension for the main mast. The main would slide over this welded bottom splice. If this approach does not compramise integrity I could go for it, but if the only proper way is a splice at spreaders level, I will have to get 2 mast profiles cut to certain length + the splice piece assmbled as one unit.

What would be the issue with a small splice piece right at the top? I know the loads there are high, but it will not be 2 profile pieces attached with a splice inside, but the inside splice will be the only piece added (like a tapered profile at the last 70-80cm)

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Re: Vagabond 20 questions for Jacques

Post by Jaysen »

The mast is under high load every point on its length. I would think cutting a longer, stock mast down to size would be cheaper and less prone to failure.

That said all the mast slices I’ve seen are at the midpoint or at the spreaders (mounts adding reinforcement to the junction). Given the options you listed I would go for the upper insert using the spreader bolts to anchor the insert.

Not sure how that will work for the sail cars. It will be interesting to see.
My already completed 'Lil Bit'. A Martens Goosen V12 set up to sail me to the fishing holes.
Currently working on making a Helms 24 our coastal cruiser.
Jaysen wrote: Mon Apr 29, 2019 3:44 pm I tried to say something but God thought I was wrong and filled my mouth with saltwater. I kept my pie hole shut after that.

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Re: Vagabond 20 questions for Jacques

Post by Sarp »

What about I use a heightened hinged mast step, say 180mm instead of 30mm. All I need is 0.5m above boom for an exact 7% scale. I will get 0.1m from mast and 0.15 from this heightened hinged, step that covers half of it. Does 0.25m (10 inch) length has such an impact on boat handling that it would require a splice and a 2 piece mast?

https://www.dwyermast.com/itemdetails.asp?itemID=448

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