Maritime Malahini

Designs for inboard or outboard power

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JimK
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Joined: Mon May 01, 2017 6:47 am
Location: Halifax, Nova Scotia

Maritime Malahini

Post by JimK » Wed May 08, 2019 10:35 am

Hello boatbuilders

With the help of my two sons, and a cautious thumbs up from my wife, we have started building a boat.
There are some beautiful boats and a lot of information on this forum. It is a great resource for an amateur boat builder.

I am attaching my keel but there appears to be a slight 1/4” bump at frame #1 that does not look right. I remember reading somewhere here that the bottom of the boat has to be smooth - I assume that means straight and flat from the transom through to frame 3?

I have measured everything a dozen times and have a few possible solutions in mind ... I’ve been staring at it for a week now - do I need to worry about the bump?

Thanks again for this resource

Jim
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DrBryanJ
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Location: Pompton Plains, NJ

Re: Maritime Malahini

Post by DrBryanJ » Wed May 08, 2019 12:03 pm

The bottom needs to be smooth, yes, but not always flat. If I remember the plans, the malahini has a slight convexity to the bottom. It isn't flat from frame 4 to the transom. But it should be a smooth curve.
Bryan

Building a malahini "Mona Lisa"

My wife said "If I build a boat, she's getting a divorce."

Biss
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Joined: Fri Apr 27, 2018 1:11 pm
Location: Camden, AR

Re: Maritime Malahini

Post by Biss » Wed May 08, 2019 12:52 pm

Jim,

Your construction looks nice and neat to me. I'm not sure I see the issue you are talking about. If you are talking about the offset from the keel to the stem, then not to worry; it will get faired away when that process starts. The Malahini is a great build and it looks like you are well on your way! Hope to have mine in the water within next few months. Keep posting pictures. The folks on the forum are great resource!

Best of luck,
Biss

footer
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Joined: Wed Jan 24, 2018 6:28 am
Location: Plainwell MI

Re: Maritime Malahini

Post by footer » Thu May 09, 2019 4:05 am

Bolting the keel to the stem caused the keel to bow between frame one and two on mine. I planed it straight, so the line transitioned smoothly from the curve of the stem to the flat of the keel.
The Malahini is a planing hull, so yes, you are correct, it has to be smooth from roughly frame three to the transom. Dips in the hull there will create a low pressure area, which translates to drag.
Looking good though.

JimK
Posts: 11
Joined: Mon May 01, 2017 6:47 am
Location: Halifax, Nova Scotia

Re: Maritime Malahini

Post by JimK » Thu May 09, 2019 2:03 pm

Thanks for the information.
I took an extra quarter inch out of the keel notch of frame 1 and everything lines up straight now. My 4 foot level is obsolete... I had to use an 8 foot piece of plywood.

This is both stressful and enjoyable at the same time?
Thanks again to everyone who has built a boat - and posted pictures on this forum.

Jim
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PeterG
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Location: Connecticut

Re: Maritime Malahini

Post by PeterG » Thu May 09, 2019 2:41 pm

Stressful and rewarding and challenging, all ingredients for a great sense of accomplishment when building your own boat. The keel of the Malahini should be straight from the transom to frame two and then curve over frame three to frame four where it bolts to the stem. To make sure you've set the keel at the right height in the frame notches, the centerline of the keel surface should be at the height where the frame bottom edges would form the point if the notches we're not cut. Hope that makes sense?
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

hoodman
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Location: Lafayette, IN

Re: Maritime Malahini

Post by hoodman » Tue May 14, 2019 4:16 pm

Looks like you're on the right track now. Keep it up!
Matt

Building a Geronimo......!
viewtopic.php?f=2&t=25139

JimK
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Location: Halifax, Nova Scotia

Re: Maritime Malahini

Post by JimK » Fri May 17, 2019 4:46 am

Yesterday we glued and screwed the stem to the frame, the knee to the transom and finally attached everything together with the keel.
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PeterG
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Location: Connecticut

Re: Maritime Malahini

Post by PeterG » Fri May 17, 2019 7:29 am

A future boat builder/naval architect/engineer at work? Such a great project to work together, builds memories and skills as well as a boat.
Looks great, sweet curves at the chines. I see you pre-cut the batten notches, I did the same with mine. Many do that after assembly of the frames to the fixture which works too but I feel if you know the thickness of your battens beforehand, it's easier to cut them on the bench. Then it's a matter of beveling some of notches to the hull shape.
Nice work, keep posting!
Murphy's Law: Anything that can go wrong, will go wrong.
Griffin's Law: Murphy was an optimist.

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Milhouse
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Re: Maritime Malahini

Post by Milhouse » Sun May 19, 2019 5:20 pm

Looks like you are making great progress! Thank you for sharing!
Jim
16' Ski Boat Restoration
17' Overnighter Sloop

I'd rather have a $h!tty meal than an $h!tty resume because a totally awesome resume will feed me steak one day - Steve Poltz

JimK
Posts: 11
Joined: Mon May 01, 2017 6:47 am
Location: Halifax, Nova Scotia

Re: Maritime Malahini

Post by JimK » Mon Jun 10, 2019 10:24 am

We now have chines!
It was stressful on the oak AND me! The boiling water and towels worked perfectly though, and aside from snapping the top off my first silicone bronze screw - everything has gone smoothly. Here’s the question: The broken screw is staying in the boat at frame 3 - but do I need to put another screw above or below it? Would another screw put too much stress on the bending oak and weaken the chine?

Again, you guys are building some beautiful boats, thanks for the information

Jim
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TomB
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Location: Holland, MI

Re: Maritime Malahini

Post by TomB » Mon Jun 10, 2019 10:33 am

I have done the same thing...many times. For what its worth, I go in the same hole at a different angle to get past the broken screw and use the same head space.

Tom

footer
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Location: Plainwell MI

Re: Maritime Malahini

Post by footer » Mon Jun 10, 2019 10:44 am

Yep, I'd pilot drill as close above the existing screw as I could with a little more up angle and just snug the screw in. It won't be pretty, but it will give you that piece of mind that it's there.

JimK
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Joined: Mon May 01, 2017 6:47 am
Location: Halifax, Nova Scotia

Re: Maritime Malahini

Post by JimK » Mon Jun 10, 2019 11:41 am

Perfect - thanks guys
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hoodman
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Re: Maritime Malahini

Post by hoodman » Mon Jun 10, 2019 5:35 pm

I wouldn't worry about the odd broken screw here and there as long as everything is positioned where it needs to be. Once the planking is on the boat will be one solid piece. It's one of the great things about epoxy and these designs.
Matt

Building a Geronimo......!
viewtopic.php?f=2&t=25139

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