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Thanks. I should have posted more about this. I had mixed results with the jig. Attention to details and experience is important for good results. I had some issues with full size panels remaining flat on the table. Also, too much downward pressure on the router would cause the bit to cut...

Using a better/accurate digital platform scale I need to correct some of these weights. 1/4" pine bc 4'x8' plywood = 28 lbs. 9 mm. luan " " = 21.65 lbs. average 5 mm. " " " = 15.3 " " The two 9 mm. sheets weighed 21.8 and 21.5...

"trade offs" and adjusting the design to the "individual person and their preferences." is the challenging part of designing and building. The shoulder flare design reduces the max. beam, increases the freeboard, and adds strength and stiffness to the sides. It can also help deflect paddle...

Most of my builds have evolved into having the side panels turn inward at the gunnels. I considered the sides to be tumblehome, based on the canoe term for sides that were narrower at the gunnels than at the water line. Because the pirogue's sides are flat and flare out above the water line I...

I tried to reduce the volume and rocker of the bow end, to keep the front end down. The widest beam being farther behind center should also help. I only wanted about 4" to 6" more room. Thanks for your brain storming and input.

One unexpected change is, this boat weighs (43 lbs.) 3 lbs. more than the last one (40 lbs.). I did use 5 mm luan for the tumblehome panels lnsted of WRC strips. Not anything to worry over. Both are considerably lighter than my other boats.

The test run will have to wait a little while. The bayou is running a couple feet above flood stage right now. I could go to the lake but it is too muddy for the fishing to be good. I don't expect any drastic changes in performance. I hope the changes will allow me to sit a little closer to...

This one has a couple of tweaks. I have about tweaked this size and design to the max. The main change is the widest waterline beam is now 18" behind center. This should trim the boat level and allow me to sit behind center. The shorter tape is at midship. The longer one is at the widest...

Add a "joug" for the oars and it would become a creole skiff and then you could row forward to see where you are going. Another form of this boat is the river drift boats. They are used on very swift and rough rivers. I think these up scaled pirogues show that a flat bottom and straight sided...

Reduce the dory's size so it can be paddled instead of rowing, and it seems to me you have described a "marsh" pirogue. Increase the size of a pirogue to work in high seas and it could be described as a dory.

If you believe adding a layer of glass to a1/4" ply boat will correct the "reasons" that turned your boat into book shelves then choose that way. Most builders using interior grade luan cover both sides and edges to try to keep moisture from the wood. Both choices may give you a serviceable...

Thoughts: Epoxy penetration/strength factor was probably insignificant or can't be determined in your comparisons. My "guess" is 5mm luan epoxy coated is weaker than non saturated1/4" bc plywood. "butt joined/thin scarf" will work if glassed over. If not a glassed backer or a rib would be...

"? for JD Water moccasin rocker is mostly in the ends of the boat, ie the boat rocker is flat in the center and the up curve starts about 2 feet from the end. so how would I change the loft of the cut back to do this? My guess is to flatten out the ends of the cutback." When I built some boats...

If you are comfortable with a boat close to the 27/34, then I would go with that. The last three or four boats I have built were basically that size ( 10.5' to 12.5' long). I need to point out the max. beam is at 8" high then the sides tumblehome to 10". This allows for a near vertical paddle...

I think you are on the right path to reach your goals. Most of the things we have discussed can be considered splitting hairs. Figuring out which split works best is the hard/fun part. Everything is a compromise and one change effects something else. More food for thought/questions: Raising...

If you widen the bottom, It will reduce the angle of the sides and secondary stability assuming you keep the same beam width. It also increases your boats "footprint" and that decreases the draft. That will raise your center of gravity which could feel more tippy. Raising the side height will...

You posted as I was typing. Disregard if you want to. Could you give us a little more information? I assume you are talking pirogue design (flat bottom, hard chine, etc.)? How long was your boat/boats, and how long do you want the new one? Rocker ".....4 inches total." means example 2" bow...

When using solid wood it is important to consider how the wood's grain is orientated. It effects how stiff or strong a piece may be. I relearned this after making and fitting four support braces. Thankfully the problem showed itself before they were installed. Lucky for me they will be...

I use a lot of Irwin Quick Grip clamps. They have sharp corners on the ends and will cut or bruise if you walk into them. A couple of wraps of tape over the ends eliminates the cuts and may reduce any bruising.

I recently bought two 2"x4"x10' boards from Home Depot. They are white and seem relative light weight. I assumed they were "white" pine. When cutting or milling they emit a nasty strong smell. Markings include "Canfor" Prime, S-P-F, #2, CMSA 110. S-P-F stands for spruce, pine, and fir. They...