Primitive Archer

Arvin,
if you overbuilt the entire linb you would lower the actual stress throughout the entire limb, which might incur a mass penalty.  I dont think it matters if the first few inches coming out of the fades were thicker or wider so long as its stiffer.

Badger used to leave the inners on the stiffside as he tillered out, and brought the bend in towards the handle more if it looked like he was getting too much set too early. My guess is that near handle set is to be avoided more over set taking further out.  Perhaps he is reading along

Do you mean grams of bow mass against the stiffness or stress of the timber against arrow speed? No, I haven't. Could be interesting though.

grams of mass/MOE as determined by a bend test of the wood.
I guess you could calculate out the actual stress.........
but either way, you would need a bend test of the wood for the next bow to plan acordingly.

The thing is though that reducing strain means making it wider and thinner. Going in this direction increases the mass per unit of stiffness.

Aussie,
have you ever kept track of the grams/MPa of completed bows plotted against arrow speed ?

Quote from: Selfbowman on May 15, 2024, 06:46:33 pm

That requires more width fades to mid limb. Short or long bow. Just an opinion.

adding width to limit set certiany seems like you can get a good handle on how much extra width it takes to make your design shoot better.

does your width out of the handle run straight for a ways before you begin to taper? if so, have you changed the distance out the limb before the taper starts? or just go a little wider to the same point as before?

Willie if we overbuild the first three inches coming out of the fades but run parallel the limbs need to tapered in thickness ? If we overbuild in more overall width thru out the hole limb length but stay the same thickness could this be close to the same spreading the load. Extra mass in the first nine inches out of the fade has little effect on performance in my opinion. Again the added reflex in the last 9” of the limb is throwing a curve in the calculation. I think. Thats why I have been chasing the set with mass from bow to bow. Obviously I build by feel with mathematical measurements from the design in mind as I go. Not smart enough to do it any other way. 🤠🤠

Nice find !