Speed of cast vs draw weight?

[PatM]

It seems like bowyers have already figured all this out but people are hopeful there's some magical other combination lurking out there.

Pat,

My goal is not to find a magical combination (I don't think such a thing exists) but to be able to understand the mechanics of the bow limbs and materials in order to be able to design a bow on paper and build it with high assurance of getting what I want without building 100's of bows and building an empirical database. As an engineer it is normal to me to use math to define the world around me and allow me to design structures and machines that work the first time out of the box. This is no fundamentally no different.

Bow making has room for everyone in it, from those that want to use basic hand tools and craftsmanship to reveal the bow inside a stave to those who want to make bows in a more precise fashion, through understanding of the physics involved. All of these approaches are legitimate in my opinion, it is really just different strokes for different folks.


Mark

 For sure,  but Archery The Technical side did all this for you  decades ago.

 

[willie]

Are moe values obtained in a bend test the average of the moe in compression and the moe in tension?
If moe tension varied much from moe compression,  then it could be noticed when comparing the averaged moe value obtained from a bend test to those values obtained from a compression test.

[George Tsoukalas]

What a journey it has been for me.

I try to let the stave dictate the design but that's after 2-300 bows.

Then there's changing the design on the fly because I thought it was the right  one for the stave...

But what do I know I'm just an old farm boy at heart.

Jawge

[Selfbowman]

Yes Jawge I’m lost too. But I’m trying to understand. Arvin

[George Tsoukalas]

Arvin, just a different approach outlined here. I taught chemistry for so many years. I used bow making to relax so I kept the math/science/ engineering out of it as much as possible.

My wife always noted that I was in my happy place while building bows.

It is good that some enjoy the math of it all.

Jawge

[DC]

I've always wanted to know how things work, even down to the molecular level. Just curious I guess. I'm not even sure how much of the knowledge gets transferred to my bow making because I really don't do a lot of conscious planning. I get an idea and go with it and take note if it works or not. I just wish there was an Issac Assimov of bow physics so I could get a clear understanding without the math

[mmattockx]

For sure,  but Archery The Technical side did all this for you  decades ago.

Not really. It started down that path, but is merely a first step.


Mark

[PatM]

For sure,  but Archery The Technical side did all this for you  decades ago.

Not really. It started down that path, but is merely a first step.


Mark

   
     But where are you in your ability to execute the science with a piece of wood?   

[Selfbowman]

Oh come on Pat. These guys are doing what they do best. And I bet there are some that can make a really good bow. Arvin

[PatM]

Oh come on Pat. These guys are doing what they do best. And I bet there are some that can make a really good bow. Arvin

  He was just starting with board bows this year though .   Sometimes it's best to  learn more of the art before the science.   Case in point, DC.

[mmattockx]

But where are you in your ability to execute the science with a piece of wood?

My last bow I got the limb thickness to within ~0.002" of what the design called for without too much trouble. When it was done I needed to do one light scraping on one limb to get the tiller where I wanted. Without the science I never would have got as close on the tiller as I did because I don't have years of experience to work by eye.

Lam bows are easier to be accurate with because I will use a thickness sander to get the components made accurately before I even start. I am trying to remove as much of the art as possible in order to increase the predictability. I don't have to be able to tiller as well as DC or Badger if I can design the bow on paper and then make it to those dimensions with good accuracy. Which is a good thing, because I am never going to be able to tiller as well as many of the veterans here.


Mark

[bradsmith2010]

i like to make self bows and stave bows,, and its difficult to measure some things,, but is rewarding when they turn out,,

[PatM]

But where are you in your ability to execute the science with a piece of wood?

 I don't have to be able to tiller as well as DC or Badger if I can design the bow on paper and then make it to those dimensions with good accuracy. Which is a good thing, because I am never going to be able to tiller as well as many of the veterans here.


Mark

  Those two things are the same thing.

[willie]

another thread off the rails, and I am not surprised the OP has not been back since he posted

I don’t mind the thread straying at all. I’m taking it all in and trying to learn.

[bradsmith2010]

what were we talking about,