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Duncan Hill




Location: Guelph, Ontario, Canada
Joined: 31 Oct 2019

Posts: 31

PostPosted: Fri 22 Nov, 2019 2:21 pm    Post subject: 15th (ish) century crossbow!         Reply with quote

Hi gang- I’m pretty jazzed about this: I’ve just competed my second crossbow; it’s a vaguely 15th century central European bow with a flat self-prod of ash. The draw weight is 100lbs, with a 25cm draw, and 20cm power stroke; about 750 inch-pounds of power. It was pretty nerve wracking tillering the prod; I had 2 that exploded, then I realized it would help to steam and bend in a little deflex first. It shoots well and HARD, with even a bit of recoil. The tiller is maple and the tickler is also ash; the nut and inlays are all black walnut.


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Michael Beeching





Joined: 22 Jan 2014
Reading list: 2 books

Posts: 270

PostPosted: Fri 22 Nov, 2019 3:41 pm    Post subject:         Reply with quote

That's a lovely crossbow - I will state that you have rather strong nerves to make the nut and trigger out of wood!
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Duncan Hill




Location: Guelph, Ontario, Canada
Joined: 31 Oct 2019

Posts: 31

PostPosted: Sat 23 Nov, 2019 2:36 pm    Post subject:         Reply with quote

Michael Beeching wrote:
That's a lovely crossbow - I will state that you have rather strong nerves to make the nut and trigger out of wood!

Thank you! Relooking at those photos, I realize the bridle looks pretty anemic so I’m going to redo it.

The 100 lb draw is well within the limits of the walnut nut, and I constructed the ash tickler (!) in such a way that the wood grain is oriented optimally for the load at each point. But it’s a fair point; I don’t think I would go much above 150 lbs with those components still of wood.

I’m very interested in the load limits of a self-prod with rectangular cross-section. I think the deflex is a critical part of this, so the next one I do I’ll aim for higher weight and more deflex steamed in.
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