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is my project doomed from the start?

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Aksel:
Just to give you some encouragement.

This bow is from a Norway maple sapling- Acer platanoides. I´m not sure how it compares with locust but still... I think it is far from doomed!

It´s 1,3" wide,
64" ntn
#50 at 27" (It´s been tested to 28")
And holds a reflex of 1,5"

slightly rounded back and flat belly. Bends in handle

Excuse the bad pictures but you get an idea.

M2A:
I like to keep the middle 1/3 parallel and taper the outers. That said I have done 1.25" wide with that layout and been successful for 50 lb locust bows. I never tried to taper the whole limb(s) but at 40 lb draw i think you have a good enough chance to give it a go. I'd keep the nocks short to get 62" ntn, heat treat, and at about 20 inches on the tiller trap the back 1/8" inch on each side. It ought to have a real good cast with your design. Hope to see this piece all finished up. good luck!
Mike       

willie:

--- Quote ---Is it a decent design or the very narrow limbs will probably fret?
--- End quote ---

decent design (length and width ) is fine, as it is similar to many primitive bows

will your stave make your weight goal without fretting is a slightly different question.
if you find the bow starting to take set early, you might lower your weight goal.

trace an outline of the back on a piece of cardboard before starting tillering. with this you can
watch for tempory set upon unstringing and monitor tempory set recovery rates

Zugul:
thanks everyone for your insight, I'll post some pics in the next days and then move forward. I'm a little more confident now, but I'll make sure to go on very slowly and carefully.

Selfbowman:
I think your pushing limits for sure.  I’m interested to find out about the even diminishing though. Being a bend in the handle bow it might make it. Black locust is pretty dense. Should turn out about 5/8 thick I’m guessing.40# seems reasonable.

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