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Maple backed black cherry bow - a question

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Tuomo:
Let's have a little guessing - what is (was...) maximum draw length for this bow? I know the answer but what you would say?

Sugar maple back, black cherry belly. Length 73,6 inch, max width (handle) 1,12 inch, tips 0,4 inch. Pretillered before gluing, tapered but not really tillered. Backing strip is cut straight from a big plank, good grain but not near perfect.

So, what was the maximum draw length and draw weight before exploding?

Digital Caveman:
Really depends on the quality of the back and the thickness of the limbs.  where you trying to break it?  I would guess somewhere over 30-35"

Tuomo:
I made a mistake with this bow, so the only option was to test, how strong it really was. I was surprised.

It was about 47#@28" – but the final draw weight and length were much more.

Result after maximum draw length:

Digital Caveman:

--- Quote from: Tuomo on April 13, 2021, 09:50:19 am ---I made a mistake with this bow, so the only option was to test, how strong it really was.

--- End quote ---

That must have been a really bad issue, most mistakes are salvageable.  It looks like there weren't any serious weak spots, it seems to have broken everywhere simultaneously.  It would take a lot to give cherry the kind of set that one piece has.  There was a guy here not long ago that blew an oak bow at 40 some inches

RyanY:
First picture looked good. Not sure I could make a great guess but it looks like you answered your question. Was it taking set before the break?

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