Tuesday, March 8, 2016

Enki Build Plan (Part 1)

***I would like to apologize for the format of Build Plan. I am copying it from a word document and the formatting doesn't follow. The more I try and fix it the worse it gets. If you would like this information as a PDF comment and I will make it happen.

Camping and Fishing Dory
M.Stuber 2016

Build Plan

One of the interesting things about boat building is the number of ways you can put together a boat. If you are reading this thinking about your first boat project let me be the first to say be carefull. If you have limited or no boat building experience and are interested in the Drift Boat hull check out some books on the topic like Roger Fletcher's Drift Boats & River Dories. There you will find a the free form method of building.  This is a great method for building a copy of a boat. With the original boat on hand one can take the lines off of the boat build the parts and assemble. If you want your first boat to be a drift boat I recommend the free form method or a kit.

This build plan is going to use a combination of the free form method described in Fletcher's book and the strong back method. I will do my best to explain why I chose to do things the way I have. I also plan on following this little document when I build the actual boat, it's gonna be fun to see what little problems I come up with as I go. So let's begin at the beginning.

Lines Drawing

Fig 1. Enki lines drawing
  • If you are building from a set of plans you have already completed this step.
  • The lines drawing is a scale representation of the hull. On a drift boat hull you will get the location of the sheer, chine, stem, transom, and station lines. This is the basic shape of your hull.
  • Additional important information on the drawing is the table of offsets. On this drawing the offsets are given as three numbers. These numbers are feet, inches, and ¼ inches, so 2-6-4 is two feet six and ½ inches.
  • Enki (fig 1) is a hull of my own design. I based her on several classic Colorado River boats. If you are interested in your own design  your going to need to learn to loft. There are several good books on the subject like Greg Rossel’s book, Building Small Boats or Lofting, by Allan H. Vaitses.

Fig 2. 1949 AK Reynolds lines drawing of Norman Nevills Cataract Boats.

  • Two good reasons to do a lines drawing along with having the factory plans are,
    • the ability to recognize inaccuracies in the given plans.
    • a beautiful hand drawn set of lines to go with your boat.
  • Many if not most Iconic river dorys began as a lines drawing (fig 2).


Fig 3. Enki model drawings.

  • If you have plans you can skip this step. If you're building a new design this is a good idea.
  • I like to use heavy cardboard hot glue and thred.
  • After laying out all of the parts and pieces using information on the lines drawing cut them out and assemble (fig 4).

Fig 4. Assembling the stations

  • With the completed model you can now really have a look at the shape of the hull (Fig 5 and 6).
Fig 5. Looking down onto the Bow of the Enki model.

Fig 6. Looking at the transom and bottom of the Enki model.

  • If everything looks good it’s time to move on to the construction drawings.

Construction Drawings

  • I like to create my construction drawings using the lines drawing and tracing paper.
  • These drawings need to be as accurate as you can get them. They will not be the final say however so don’t get overly concerned if your pencil lines can’t accurately represent something like a ¼ or 1/16 inch.
  • This is your first opportunity to layout seating and or decking. Layout oar positions adjust frame spacing and even see if that cooler you’ve always wanted will fit.

Fig 7. Construction drawing for Enki.

  • Take your time and have fun with the drawing process.
  • The creation of the construction drawings are another point you can find mistakes.

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