Figuring the size and arch of the curve proved to be challenging. I was going to go buy a infant sized baby doll for reference but I couldn't find anything. So I wrapped a towel in a small blanket and pretended. :)
The arch ended up being 22 inch diameter circle (inside) Outside was 24 inch.
I made a quick stick compass and made a template.
I cut the front and back curves with my band-saw then clamped them together and sanded the curves smooth.
I then cut the handrails and glued and screwed the hand rails to the front and rear frames as well as a few ribs for the bent 1/4" plywood.after letting the frame dry overnight, I cut a piece of 1/4" plywood for the top curve (the seat.)
This is where I ran into problems. the 1/4" plywood did not want to bend around that radius. I tried and tried and could not get it to sit properly at all.
Throwing the bent plywood idea out the window, I moved to slats.. I cut about 8 slats of 1/2" plywood and 16 supports. I then glued and nailed the slats in place and followed that with each support.
After the glue dries, you can sand the inside of the curve to remove some of the flats of each plywood slat. Next, using wood filler, I filled in each joint to soften the meeting point of each slat.
Last comes the legs. This is basically 4 boards glued and screwed into the front and rear frame.
After that dries, I used a block of wood with a pencil laying horizontally to mark horizontal cut lines for the lower legs. This equalizes the length of them and gives the correct angle to sit flat on the floor.
The rest is pretty basic.
touch-up and done!
I really wish I had more pics of the build... Maybe next time.