I have rafts and duckies, so I started with raft paddles. and then jumped to kayak paddles. I made a scarf joint jig for the table saw, that is a big chunk of plywood with guide bars on the bottom and an angled wedge to get the joint. then I cut a whole ton of dowel stock until it seemed to work.
After all of that effort, I was looking at Jimmy Snyders rivrstyx (I am so not worthy) and realized he is making his zero offset. So, I made one like that, (the ash monster) and paddled it, The zero offset is not too weird to get used to, the big problem is that I have a stupid heavy paddle. I may see if I can belt sand it down..
My current method combines power and hand tools, and I pretty much use what I have got. I have started making blade templates on hardboard that I can trace onto the paddle blank, and then have guidance shape the blade.
I will either use solid wood or a laminated shaft that I cut down on the table saw to 1 3/8 inch square.
I cut all of my blade stock into strips 1 3/8 inch thick and then as thin as 5/16 to as thick as 1 1/2 inches, I then plane them flat, and then cut them into 18 inch long pieces.
Then using all the clamps I have I glue the blade stock to the shaft.
I glue it all flat on my workbench, and just cover the bench in Kraft paper (it sands off nicely) I have used thickened epoxy and also titebond 3, right now, I am liking titebond 3,
After the glue sets I sand it flat, trace the blade shape and then jigsaw it out, I then run a center line, around the whole blade, and then start shaping. My weapon of choice is an angle grinder with a flappy wheel, (40 grit) and a 60 grit belt sander, and then spoke shaves. During the school year I can use my schools band saw, but that has taken more off too fast, and it is really hard to put wood back.
Once the shape is good I do an epoxy coat with RAKA uv stabilized epoxy, and then lay a single sheet of 4 oz fiberglass on each side of the blade. I sand off the excess (wear a mask and safety specs) and then it is 5 coats of spar urethane, and thats it... I can go from a pile of sticks to a paddle in about a week...
I keep either a takedown (aquabound shred or hand paddles) with me just in case I have an oops on the water.
But, I still need to get some measurements, because I do not get how folks are making solid ash paddles...