New here, I'm from France, and have a long-time passion for achery, bows and crossbows though I don't have a lot of equipment. Here's a crossbow I finished some weeks ago, quite heavy one, designed so it can shoot two bows at the same time like penobscot's bows. But for now it has only one, a 50 or 55 lbs plumtree bow with a specially big draw length (22", taken from the back of the bow) which makes it quite efficient.
As an improvement I want to craft more powerful wooden bows, using yew preferably.
Currently it shoots a 20 gram aluminium quarrel at 140 fps, with nice accuracy. I think I can double this with a stronger bow, and get even more if I add a second one.
At full draw (bends too much in the middle) :
I know this is not scrupulously medieval (dacron string, screws), but I do with what I've got, while trying to get it to look good enough. Will post more pics if you want.