Offsets for the French Fragniére Moth Classique

12.32 in Boat Plans, classique, for, fragniã©re, french, moth, offsets, the

Plans de voiliers classiques Moth, Plans de dériveur classique Moth.

When I have some spare time I try to load a Classic Moth design onto the computer (usually with modifications, but hey, this is the beauty of the Classic Moth!). This time I have the offsets for the French Fragniére design, designed in the late 1950s and equivalent in design progression to the North American Mint or Cates design (which we classify as Generation 1). The Fragniére is a simple V-shape design with lots of rocker. The most unusual characteristic is the V-shaped transom bow which may not be at its best in open water but gives the design a distinctive look. This was a very popular design in France and should present the competent amateur with a straight-forward building project (except for the curved transom bow as shown in the plans - which would take some planning).

(To work with the PDF file, click the pop-out icon on the top right-hand corner to open the PDF file in another tab. From there you can print or download the file.)




Click here for the offsets of a three planker modified Fragniere Classic Moth design.

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Offsets For A Three Plank Modified Fragniére Classic Moth

16.32 in a, Boat Plans, classic, for, fragniã©re, modified, moth, offsets, plank, three

Plans de voiliers classiques Moth, Plans de dériveur classique Moth.

Sometimes I cant help myself. Ill sit down at the computer and push the lines of an existing Moth design in another direction. This is one of those creations. I took the Fragnière design, the French design with the transom bow, and made it a three planker. (Three planker means if you look at the 1/2 model, the design consists of three plywood planks - never mind that the bottom rocker plank is actually one contiguous panel when whole.)

Why? Because I can. I would expect this design to be somewhat quicker offwind but slower upwind in a chop and light air. No plans to build this anytime soon as I have enough projects all ready.

Here is the PDF file of the offsets. Click on the pop-out icon on the top right (hover your mouse pointer over the top right corner to find it) to get this into another tab where you can print or download the file.



Another modified Fragnière (it looks like the transom bow doesnt match the plans). A 2001 build in France. I like the purple hull color.

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Erratum: This is actually the French Bilbon design which was patterned after the French Caravelle dinghy and not the Fragnière.

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Offsets for my other modified French Moth design, the Zippy can be found by clicking here.

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Florida Cates Moth Offsets

16.27 in Boat Plans, cates, florida, moth, offsets

George Albaugh, fellow blogger and Moth class keeper of plans, kindly lent me the Florida Cates Classic Moth plans to look over. Jeff Linton got his start in the Classic Moth class in a somewhat tired fiberglass Cates and just recently, Gary Gowans, shown in the photo below, won the Gen I division in the 2014 Classic Moth nationals with his home-built modified Cates.

George provided more details on the history of the Florida Cates Moth in the comments section, which I have dragged over to the main post:

"Warrens 1954 World Champ boat was Mach One, NOT Mach Two. After Harry Cates modified the design of Mach One to make the boat easier to build and less tippy, Warren ordered one from Harry and named that particular boat Mach Two. The modified boat is alternatively referred to as a "Cates" a "Florida" or a "Mach Two" design, depending on whom youre taking to and to an extent where you are geographically up and down the eastern seaboard.

"As a footnote, only a handful of Mach One type Moths were built. The Mach One has more keel rocker and a much deeper vee. This makes a Mach One type almost as evil to sail as a Mistral. This also means that the bow sections on the Mach One have to be pulled up pram style rather than planked as in the case of the Mach Two/Cates/Florida derivative. Warrens Mach One had a false nose, made of fiberglass, glued on the front of the hull to achieve the sharp stem seen in most surviving photos of the boat.

I scanned parts of the plans and was also able to convert the Florida Cates lines into an 8-station offset table incorporating Gary Gowans wider transom. Ive made up a small PDF file, which, while not the complete plans, gives you the flavor of how they built this 1950s design. If you were an experienced builder, you could probably make something out of this PDF. If not, contact George for the complete set of plans (see PDF).

To print or download this PDF, click on the right-facing arrow icon on the top right of the PDF window. This will open the PDF into another tab.

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Zippy Moth 8 station offsets

08.17 in 8, Boat Plans, moth, offsets, station, zippy

Plans de voiliers classiques Moth, Plans de dériveur classiques Moth

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I had it on my to-do list forever but I finally got around to generating the offsets for the Zippy Classic Moth (a modified French Proust design) as 8 stations, which should match the frame placement for a home build.

Offsets for Zippy can be found by clicking here.

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Mistral Y2K Section Offsets Via John Z

21.19 in Boat Plans, john, mistral, offsets, section, via, y2k, z

I mentioned when I published the offsets for the Mistral hull panels that you still needed some bulkheads to bend the panels around. John Z. immediately shot me, via email, the section dimensions he measured off his very fast Y2K Mistral. They are taken every 305mm to give an even 11 sections over the length of the hull. (Station 3353 being the transom, sitting on the aft end of the hull panels). John used every other section inserted in his panels when he bent them up to set up the hull shape. It must be noted that 3 bulkheads are left in the hull before decking and two of them dont exactly lie on station spacing given (the forward edge of the aft deck being the exception, it usually aligns with Station 2743.).

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