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Classic Wooden Yacht Tender #2: Transferring Lines w/ Tissue Paper

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Blog entry by SemperSailor posted 01-27-2018 01:39 PM 617 reads 1 time favorited 7 comments Add to Favorites Watch
« Part 1: Step 1 - To loft, or not to loft Part 2 of Classic Wooden Yacht Tender series Part 3: Mold Stations Complete »


dd
I hope this works! I did mold lines 2 & 3 while I had the tissue paper tapped down.

I traced the outline of the lofted lines through the tissue paper and then tranferred the lines to the mold material. I taped the tissue paper to the board and then put nail holes along the lines. I then removed the paper, put the nails back in the holes and connected the dots with long batten to make them fair.

I think it will work.

This image shows the connected and faired line for mold #2.

Need Some help here: I’m still unclear how I’m supposed to draw the line for the keel / keelson connection on the mold. I’m not sure I have that right. Any thoughts from my fellow Lumberjocks?

Lesson learned: I shouldn’t have used so much tape and I should have used painter’s tape…it took a while to remove the tape because I didn’t want to destroy the loft plans.



7 comments so far

View shipwright's profile

shipwright

8086 posts in 2943 days


#1 posted 01-27-2018 02:26 PM

The keelson should be on your section lofting. It normally would appear as a rectangular notch at the bottom of the station that allows the station mold to fit over the keelson and reach the rabbet line.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

View htl's profile

htl

4106 posts in 1304 days


#2 posted 01-28-2018 12:21 AM

Now say that in English so the rest of us can understand,.
Just kidding. LOL

-- An Index Of My Model making Blogs here on Lumber Jocks.. http://lumberjocks.com/htl/blog/116729

View SemperSailor's profile

SemperSailor

23 posts in 298 days


#3 posted 01-28-2018 02:16 PM

Shipwright, if you notice in the top image, the station lines do not connect at the bottom near the keel / keelson. I’m not sure where to make that connection, and not clear why the lofted drawings have a gap. I drew a straight line from the end of the station line to the top of the keel to make the connection, but not sure that’s right.

Here’s the image with a red line showing on the plan to represent the gap, and how I connected and transferred to the mold material.

I bought the lofted plans, and would think the lines would / should connect. The more I think about it, I think I should have connected the station line to the top of the keelson instead of the keel.

View shipwright's profile

shipwright

8086 posts in 2943 days


#4 posted 01-28-2018 03:26 PM

Did you just get sections or did the give you a plan view (overhead, looking down) and a profile (from the side)?

Because the keel and keelson are in different places (elevation) at different stations, a single representation of them in the section drawing is misleading. Looking at the end points of the station lines I wonder if the keel/keelson may not also be wider in the middle of the boat. I would need to see a more complete set of plans or table of offsets to know any more.

There is a great deal more to lofting than just producing section lines so if this is all they give you it is only a small part of the picture and you have to fill in some details.

The important point for you is getting the top of the keelson at the correct elevation above the baseline at each station and then mounting the stations at the correct elevation above the baseline (and level, square, and plumb). This should sort your problem in the real world but it should have and could have been done in the lofting.

I hope this is understandable.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

View SemperSailor's profile

SemperSailor

23 posts in 298 days


#5 posted 01-28-2018 03:48 PM

Shipwright, you are correct! I have individual station views of the connections at each station, which are at differing widths. The view for station 2 is about 1/16” off, but it seems more clear now. Thanks!

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shipwright

8086 posts in 2943 days


#6 posted 01-28-2018 03:51 PM

PM me any time you run into a problem. I’ve done this a bit. :-)

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

View shipwright's profile

shipwright

8086 posts in 2943 days


#7 posted 01-28-2018 04:13 PM

Here’s a a blog series that might interest you.
http://lumberjocks.com/shipwright/blog/series/3340

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

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