Delaminated? Were you making a fiberglass bow or does that happen with self bows too?

Sorry to hear it though. I've broken about 1/2 dozen bows over the past year. Now I have to force myself to slow down if I want the bow to turn out like I want it too. You can also learn a lot more from a broken bow than a working bow. Find the errors and use it to help improve your next bow.

  Once I break a bow I take a very deep breath and let it out, learn from my mistake, and throw the bow in the brush pile and start a new bow right away. Breaking a few staves is just part of the process, it's really important no to dwell on it.

Remember, when it comes to bows: "If you ain't breaking, you ain't making" 

No, this was a piece of osage, it had a discolored spot on the belly side of the stave.  As near as I can figure, something hit this tree about 75 to  100 years ago and almost broke it.  It's on a floodplain, I figured it had a tree or large limb slam into it.  It eventually washed into the creek, where I found it and started to salvage parts of it.  I managed to make a 48 inch (1.2m) plains style bow, it pulls about 40 (16kg) pounds at 25 (63cm) inches.

This didn't make it to the tillering tree, as soon as I removed enough wood for it to flex when floor tillering, I heard "tick, crack and crackle".  I hate hearing those sounds when making a bow!  I got three bow staves from that one split, one has and one doesn't have the spots and I still have the rest of the tree, once I get it out of the creek bed.  And I already have a barn full of wood that is already seasoned, all I have to do is start working on it.