alu sailboat buliding

[SailandOar]

We are very happy with the original/traditional Goit hatches. Very industrial strength for small boats but not as heavy as commercial/fishing boat types.


http://www.goiot.com/pdf/p30-31-32.pdf

[MrRodeoCC]

Originally Posted by Donald Branscom

Airplanes that carry passengers do not put glue on the seams.
But the fuselage has an inner shell that is pressurized and is made of composite materials and is actually tank tested for air tightness. Look at the windows next tome you are in a commercial air liner and you will see there is a inner window and outer window.
There is a space in between.

Just have to set this straight. I've worked on aircraft for 26 years and every skin and structural repair we make had sealant between the skin and structure. We also use sealant on the rivets to make the fuselage airtight as the fuselage skin is the pressure holding material of the aircraft, the inner panels you see are strictly sound and tempurature insulating materials. The reason every seam is sealed is to maintain pressurization and prevent moisture from collecting in the seam areas and freezing when the aircraft reaches altitude (@ -30 degrees at +30,000 feet) which would force the materials apart. The window have inner and outter layers to prevent you freezing your hand to the window due to the temp extremes, notice the windows have small holes in the inner layer so the pressurization can equalize between the layers. The only aircraft that doesnt use sealant is an all composite structure, but the structure itself is a composite made with resin so it was sealed when constructed/formed/molded.

Jody

[zeyang]

Tackweld on stern plank.

[mb_welder]

I love where this is going!

At first it had me thinking "Oh look, another yahoo that's taking on more than he can accomplish. It'll never go anywhere!"

Time went on and,

...well, I'll eat my thoughts! I love it, and look forward to seeing more progress and the end result! I wish I had the talent, patience and knowhow to accomplish what you are working on!

That my friend, is a thing of beauty!

Cheers!

[zeyang]

Originally Posted by mb_welder

I love where this is going!

At first it had me thinking "Oh look, another yahoo that's taking on more than he can accomplish. It'll never go anywhere!"

Time went on and,

...well, I'll eat my thoughts! I love it, and look forward to seeing more progress and the end result! I wish I had the talent, patience and knowhow to accomplish what you are working on!

That my friend, is a thing of beauty!

Cheers!

thanks, many time ive been thinking the same.
so i work hard to reach the point of no return. after that it will be difficult to just walk away from this project. not sure where point of no return is: but probably when frames and deck is in place.

zeyang

[zeyang]

won an acution yesterday. so now i have 3x9 tonns winches ready for flipping the boat. will reuse the chain at later stage onboard. now i have 60 meter of it.
zeyang

[zeyang]

keel plank is tackwelded into position. the small ears are just temporary fasterners.

[zeyang]

making template for bowplank.

[zeyang]

work on the bow today. will tackweld into position tomorrow.
also made a test how the rudder would be.

zeyang

[MrRodeoCC]

Thats going to be real nice when you get it finished. I watch this thread religiously.

[zeyang]

finish tackweld whole keelplank.

zeyang

[zeyang]

apropos bowshape. this shape is my favorite. need to figure out how to make this look nice in alloy.

[rode2rouen]

Originally Posted by zeyang

apropos bowshape. this shape is my favorite. need to figure out how to make this look nice in alloy.

1. Get yourself a large slab of the appropriate aluminum alloy.
2. Get yourself a large multi axis CNC machining center.
3. Whittle away everything that doesn't look like the shape in the pictures.

Easy enough, eh?


I love this build, and I appreciate the time you spend keeping the thread updated!!


Rex

[zeyang]

Originally Posted by rode2rouen

1. Get yourself a large slab of the appropriate aluminum alloy.
2. Get yourself a large multi axis CNC machining center.
3. Whittle away everything that doesn't look like the shape in the pictures.

Easy enough, eh?


I love this build, and I appreciate the time you spend keeping the thread updated!!


Rex

thanks. i might spend a little too much time on the forum but as long as I manage to run at least 30-35 hours in the shed its ok.

Here is actually me dream-bow, but this is way to advanced for me to make without heavy equipment (pyramid roller/english wheel)

zeyang

[DavidSim]

>>Thats going to be real nice when you get it finished. I watch this thread religiously<<

X2

[zeyang]

This is kind of interesting (at least to myself)
It is 727 work hours between these 2 pictures.

keel 56
plank-01 40.5
plank-02 71.5
plank-03 29.5
plank-04 33.5
plank-05 36
plank-06 41
plank-07 40.5
plank-08 32
plank-09 27.5
plank-10 38.5
plank-11 28
plank-12 28
plank-13 51
plank-14 36
plank-15 30
plank.16 42
keel: 66
sum: 727


zeayng

[ed mac]

going to be nice just dont get stuck

[dave powelson]

Zeyang,
Presumably you want the exterior welds on the laps to be seal tight.--especially
at the starts and stops of the initial tack welds.

??Are you going to TIG the starts and stops to seal??

Or grind into each end and MIG??

??Or is there another plan?

[You've gained an audience of thousands, watching your progress. I'm impressed!]

[zeyang]

Originally Posted by dave powelson

Zeyang,
Presumably you want the exterior welds on the laps to be seal tight.--especially
at the starts and stops of the initial tack welds.

??Are you going to TIG the starts and stops to seal??

Or grind into each end and MIG??

??Or is there another plan?

[You've gained an audience of thousands, watching your progress. I'm impressed!]

No specific plan sofar how to go along yet.

Im reading my self up on alloy mig-welding now how to weld this. im only used TIG sofar so i probably need some advice as I go. I have plenty of scrapmetal i will test on before i start. i have mostly overlaps and a few corners (the keelplank) (90 degrees between the keel plank and the hull plank)

zeyang

[nikodell]

Similar disease, different cure," http://dallur.com/ ", I found this site looking for CNC plasma info. Nice plan and work you have going. I would love to do what you are doing.

[zeyang]

Originally Posted by nikodell

Similar disease, different cure," http://dallur.com/ ", I found this site looking for CNC plasma info. Nice plan and work you have going. I would love to do what you are doing.

Thanks, same disease for sure. :-)
did they use a pyramid roller to get that nice shape of your hull?

If i ever willl make another hull I would love to make it as vineglass carvel with help of english wheel and pyramid roller. that would be a challenge!
Im really impressed with people like those guys manage to force heavy steel into some pretty shape

They seems to be from iceland i hoped their project survived their country economic meltdown.


zeyang

[zeyang]

regarding others projects and time they spend. I know i shouldnt read such . it makes me get nightmares working for the rest of my life with this project :-)
I plan to finish up by late next year.

http://www.toan.se. A swedish guy. He spent 10 years!

http://www.boston.com/sports/outdoor...26/dream_boat/
Guy from US eastcoast. He spent 30 years working on his boat. And the best.. he named his boat: restless!


zeyang

[nikodell]

There are worse things to spend your time on, sailing not being one of them. I would you would not build unless that was part of the expected journey, we all know its not the cheap way out. Thanks for the other links to look at. My preference would to build the DIDI 6.5 meter Mini of Dix design if I get the chance, a light fast plywood boat. I have had a few friends sail the world but they bought cheap fixer-uppers and made on average a 2 year prep before heading out. So where do I need to get to work with you on that thing?

[rugludallur]

Hi,

My name is Jarl and I'm one of the guys behind Rugludallur (Dallur) project, someone notified me that there were some questions here so I thought I would post.

First of all we did not use any special roller, all plates were rolled with a standard 3 barrel roller in 2x3m sizes. The construction method/design is called radius chine, it's based on all curved plates having the same radius, using small sections and tilting them more and more as you approach the transom.

In our case we plotted the outlines of the sections onto the plates before rolling and than we just manually plasma cut following the lines.

When you weld all the plates together it works sorta like shrink-wrapping which fairs out the plates and creates the shape you see.

We are well off despite the economic meltdown, we didn't really participate in any of the madness so we are relatively unaffected.

I don't know how much time we have spent and I'm not sure I want to know, it's a journey not a destination and if the journey takes a bit longer that's just more for me to enjoy, hopefully we will finish next year though and get to the sailing part.

Cheers
Jarl

[zeyang]

to cold to weld today - 17 degr C.
So i fiddle with the plan to turn boat.
Problem is: The shed is a little flimsy and a little narrow so i need to beef up the shed to lift 3 tonns (actually 1.5 tonns) since it will be touching the ground all the time. I have 3 pcs of 9 tonns come along so i have enough lifting power i think.

zeyang