inspired by trebuchets recent efforts, I finally put something that could be called a recumbent together. It's a no-weld experiment but some cutting (grinder with cutoff wheel. I took the back triangle from a boys mountainbike and left a couple inches on the top tube so it could saddle into the fork (minor grinding on the fork for decent fit), then two ubolts with an extra bar going across them to pull the two together and smaller ubolts to hold the bottom of the fork to the triangle.
The second ride was a LOT easier than the first one
Still needs some work, need to get some more caster (arms get a workout just gliding), but happy it works as well as it does on the first try. That's a piece of 2x3 with a piece of stadium pad and a ubolt btw.
It went together in a couple hours.