Normally I publish project that are pretty worked out, but I this case I make an exception. This dining chair is Version 6 of a design process, that is likely to be continued.
I had the opportunity to make a life size prototype on a Holzfraese at Koch-Mannes Maschinenhandel in Schweinfurt. It was cut out of 18 mm plywood using a 4 mm single flute end mill at unbelievable 4500 mm/min with only two cuts (9 mm depth per cut). This is clearly not a machine for the enthusiast hobby maker, but it just great to try it out.
The wedged mortise joints work like on my Doll High Chair but they are flush with the surface when they are hammered in. I did a 6 mm roundover using my small handheld router and sanded the parts before assembly.
I made a smaller prototype out of 6.5 mm plywood on my machine.
As I made a prototype the material was not high quality. You can see a little tear on the upper edges here.
Nesting was optimized for 125 cm x 70 cm, but then we used little bigger material ;)
No holding tabs where harmed making this chair. The saw dust gets crammed into the groves so hard that tabs aren't needed.