"DIY-Tris.com"

A Web Site For Do-It-Yourself Small,

Homemade Trimarans

 

Presented by "Dr. Frank" Smoot, and dedicated to DIY boat builders everywhere!

 

 

The "Slingshot 16 - Solo" Trimaran!

[Please see large photo just below]

 

If you have any questions, please email me at drfrank@coachfranksmoot.com

 

 

Wow, I haven't posted anything new to this web site for more than 3 years!

 

So it's fitting that the new-post honors go to my most popular design, the Slingshot 16 Solo.

Actually, this is an improved version of "Laura's Boat." The differences include a broader entry and

more freeboard, as well as a more robust sail plan and generally hardier overall construction.

 

The amas are also bigger (14' vs. 12) to cope with the increase in sail area from the 85 sq ft unbattened sail on the original Laura's Boat to the 118 sq ft radial batten sail I designed for the Slingshot 16 Solo.

 

Here are the basic specs for the Slingshot 16 Solo:

 

LOA = 15' 10"

Beam of center hull at sheer = 26"

Beam of center hull at waterline = 26"

Beam folded = 6' 6"

Beam open = 12'

Sail = 118 sq ft radial batten sail on unstayed (freestanding) mast

Weight all up = approx 185 lbs.

 

Here's what it looks like ready to sail!

 

(with folding amas, pivoting mast, crutch, and small outboard)

 

 

 

If you'd like to see some videos of the Slingshot 16 Solo

in action, here's a bunch of them:

Slingshot 16 Blasting Around Tampa Bay, December 2, 2014 Http://Youtu.Be/Ns0E7UeBqA4

S-16 - Starboard Tack, Terra Ceia Bay, Dec 21, 2014 - http://youtu.be/Y6OrRtcM3nwC

S-16 Trimaran - Hands-Free Tacking! (12-21-14) http://youtu.be/uo5kB12omGM

 S-16 Trimaran Outboard Test (3.5 HP Merc) http://youtu.be/bsd_hvkvVPA

 S-16 w Doyle sail and 16 amas (Mar 8, 2016) https://youtu.be/7zHX4YnV-bU

Slingshot 16 Trimaran Gets A Jib!  https://youtu.be/3SKTbkQ_H7U

 Slingshot 16 on Tampa Bay with Jib May 25, 2016 https://youtu.be/s1cBRSK81Zk

Slingshot 16 Trimaran Jib Evaluation July 17, 2016 https://youtu.be/3hG6f-Y5gm4

 

If you would like to build the Slingshot 16 Solo trimaran...

 

...basic plans include one-piece, tubular akas and 14' amas. For a small additional cost,

you can get a supplement with plans for larger (16') amas and folding akas.

 

As with all of my boats, a competent (and gutsy) sailor can expect speeds up to 15 mph in a hearty breeze.

(And that's without the jib, which is strictly experimental on my own boat and isn't in any of the available plans)

 

Plans for The Slingshot 16 Solo trimaran (and my other boats) can be purchased here:

 

http://www.duckworksbbs.com/plans/smoot/index.htm

 

 

Below are 30+ photos showing the progress from starting the hull to "ready to sail!"

 

 

1

I always glue in the sheer clamps while the hull sides are on the bench.

 

SO much easier now than later!

 

2

 

 

3.

 

 

 

5

Laying out the bottom and bilge panels.

 

 

6

 

Cutting out the bottom and bilge panels.

NOTE: Although I used 3mm ply here, I'd actually recommend 5 or 6 mm for these panels.

 

7

A bit fuzzy, but you get the idea.

 

8

 

9

A layer of 6 oz glass anywhere I can put my weight.

 

10

 

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12

6 oz glass on the exterior.

 

13

 

14

Just can't beat a patio chair for simplicity, durability, and comfort!

 

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Starting on the 14' amas.

 

 

 

   

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30

Constructing the aka bolt blocks.

 

 

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Finished amas.

 

34

Ready to go!

 

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36

 

On the beach at last!

 

 

37

Testing the home-made, radial-batten polytarp sail.

 

 

 

38

 

Works amazingly well, enough so to justify getting one professionally made.

 

 

39

 

 

   

40

 

Now it has the professional sail, and also folding akas, a crank-up mast, and a small outboard. ready for whatever comes!

 

 

 

 

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