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Sheet Metal Boats - Sheet Metal Seams For Boats

pricer - Jun 05, 2004 - 03:28 PM
Post subject: Sheet Metal Seams For Boats

Would this be a pracical seam for the hard chines of he boat Junior Scout J? The male counterpart of the seam is not shown in the attached drawing but it will be notched as well. The male part of the seam will be a little diferent. The notch will not extend to the bend line, it will be shortened by an 1/8" and by doing this I think the final edge will not reveal the notches but it will let the seam remain flexable and tight enough for soldering without having the problems of soldering the notch. Tell me what you think...

pricer - Jul 03, 2004 - 04:10 AM
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pricer wrote:

Would this be a pracical seam for the hard chines of he boat Junior Scout J? The male counterpart of the seam is not shown in the attached drawing but it will be notched as well. The male part of the seam will be a little diferent. The notch will not extend to the bend line, it will be shortened by an 1/8" and by doing this I think the final edge will not reveal the notches but it will let the seam remain flexable and tight enough for soldering without having the problems of soldering the notch. Tell me what you think...

HDoes anyone have any input on the seam I had posted a while back? This is what I meant when I talked about the notched standing seam for a curve. All of the seam will be bent by hand and will take some time to do. Any other ideas would be nice to hear as well.
Thanks

Bud - Jul 03, 2004 - 04:36 AM
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I'm thinking that maybe it would be better to have the base of the seam inside so it will close as you bend it and not open?

JMHO

pricer - Jul 03, 2004 - 01:15 PM
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Bud wrote:

I'm thinking that maybe it would be better to have the base of the seam inside so it will close as you bend it and not open?

JMHO

Explain in more detail. My intentions are to have the seam inside the hull.When you look from outside he hull at the joint, you will see to panels that meet,like the back side of a standing seam. All you would see is the lead in of the two bends leaving a clean surface. Am I explaining this right?

Bud - Jul 03, 2004 - 01:37 PM
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Sorry, I maynot be looking at your drawing correctly or I do not understand it? The side view is shown in radi form and the notches did not change from the plan view? I'm getting kinda cross eyed trying to understand it...I study it more. Smile

pricer - Jul 03, 2004 - 02:37 PM
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See if this helps at all.

Bud - Jul 03, 2004 - 03:04 PM
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OK..Much better for me to see now:)

steve2 - Jul 04, 2004 - 02:15 PM
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Price, would it perhaps be easier to change positions of the seams? By that I mean have the double fold seam run flat along the gentle curve of the bottom (folded first) then fitted to the curving side panel which would have the single 90 degree fold that could be turned in a rotary machine thereby eliminating the need for notches. Just a thought

pricer - Jul 04, 2004 - 02:58 PM
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That seems like a good idea. I am still looking for that unseen factor,you know, the one that makes you think,"Why didn't I think of that". At our hot rod shop, they have a rotory machine that can turn a 1/2" flange on a curve. It is a three step process that uses nylon dies. I am thinking now that I could turn a flange on both panels and make the standing seam independent from the panels and attach the seam to either or the flanges turned on the panels. On second thought, that won't work either, the seam and flanges will still need to have a compound curve. Maybe I should keep the bottom edge of the boat strait until something eles can be worked out. Thanks for the suggestions, I am sure we will come up with something eventually.

bordontn - Jul 15, 2004 - 03:07 AM
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I built a cajun style pirouge using 1/4" plywood .The side are cut straight w/the ends cut on a 45degree.
When you fasten the sides together at what will be your bow & stern & insert your center frame the bottom will curve. You don't have to cut your sides with a curve.My boat is 14' long .With the bottom sitting on a flat surface the bow & stern are about 3"-4" above bottom line...bordontn

pricer - Jul 15, 2004 - 03:16 AM
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bordontn wrote:

I built a cajun style pirouge using 1/4" plywood .The side are cut straight w/the ends cut on a 45degree.
When you fasten the sides together at what will be your bow & stern & insert your center frame the bottom will curve. You don't have to cut your sides with a curve.My boat is 14' long .With the bottom sitting on a flat surface the bow & stern are about 3"-4" above bottom line...bordontn

i noticed the same thing when i built mine as well. someone told me that was called "rocker" supose to help you turn in the water and without a keel or skeg it would be hard to keep it strait while paddling,

pricer - Jul 19, 2004 - 12:06 PM
Post subject: dxf test 1

test

pricer - Jul 19, 2004 - 12:08 PM
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You must right click and "save target as" to download. I had to do it this way at my site as well

Bud - Jul 19, 2004 - 12:20 PM
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Works Great!

pricer - Jul 19, 2004 - 12:25 PM
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Now that drawing was from the private collection, be careful! lol

marky - Jul 20, 2004 - 03:02 PM
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Would it be possible to use a grooved seam on this joint eiter internally or externally,aw ra best Marky