Horn crossbow?

[Selfbowman]

Fades

[Selfbowman]

First guess on tiller reduction . Trap . Scribe 1/4 on the belly . 1/8 on edge of horn. Well see if it will bend now.

[Selfbowman]

Catastrophic failure!!! 😩😁😁😁 is this what you where saying Pat?
I new that drawing sucked. Never can trust architects.😁
Arvin

[Selfbowman]

Pic

[Selfbowman]

Pretty sure Gods telling me to go to bed. Arvin

[Selfbowman]

I have one more piece of bamboo with matching nodes.

[bownarra]

Right, now before you glue that back together put the wedge in like I suggested before.
If you cut the other piece you should be able to insert a wedge.
Take a look at 3 piece takedowns. The wedge is there to stop this happening. There must be no to very,very little bending happening. Remember the end of the riser is acting like a pivot and is of course a stress riser....
I was fairly sure this would happen but didn't want to put the kybosh on things....
Personally I would scrap the boo add the wedges, covered with a thin lam of maple then sinew back. The sinew will allow a longer draw - everything in the crossbow world haha and of course if won't have tendency to split like the boo will if you look at it wrong.
Cool project and I hope you get a shooter out of it.

[BowEd]

Well that's that for the that attempt.Live and learn.I'll have to speak with my friend who builds those take down bows and have him peek in on this thread.
The limbs were plenty strong.

[DC]

Although I agree with everybody that there should be a wedge in the fade area, that looks like a mounting problem to me. It looks like the bolt was trying to pull though the Osage and split it and the Boo. I'm wondering if that would have happened if you had an aluminum cap instead of the Osage. I know that's not primitive but you get my drift.

[PatM]

Something like that.  I also thought the boo might flex right where it intersected with the Osage and separate.

  It definitely looks like it needs more across the grain strength.    I'd rather do a circular wrap of those parts and lash the limbs in place than drill and bolt.

[Selfbowman]

If I can’t give the pieces to someone to try sinew I will probably put bamboo on the broke limb and tone it down to say 80-100# bow. Forget about Charlie’s record. 😁I like Charlie anyhow. Arvin

[Selfbowman]

No takers on sinew. Limbs to narrow anyway. Redesigned! Sure to work this time.😁added more deflex. String nock and back of limb the same 2-3/4 off the bench.

[Selfbowman]

Glued up the other limb.

[Selfbowman]

New limb.

[Selfbowman]

Well it’s not going to be heavy but I’m liking it.