Main Discussion Area > Bows
AVCase design Arvin bow build
bjrogg:
--- Quote from: Selfbowman on March 06, 2023, 11:19:51 am ---Brad just stay tuned in. I’ve got some places that I need to add a hair.🤨🤠 this going to be a fun experiment. Engineer vs. Builder 🤠🤠
--- End quote ---
This is interesting Arvin.
It definitely isn’t how I build a bow. I’m definitely not the building to measurements type.
I rarely measure anything more than the length and rough handle dimensions.
I often get asked for measurements. It seems like I work with so much character wood that doesn’t tend to follow the blueprints.
Be interesting to see if the really clean wood will
Bjrogg
Selfbowman:
BJ your one of those finger calipers guys I was thinking of!
bjrogg:
--- Quote from: Selfbowman on March 06, 2023, 11:54:12 am ---BJ your one of those finger calipers guys I was thinking of!
--- End quote ---
Yes I am.
Honestly I shouldn’t say I never measure anything because I constantly measure them. Just can’t put a number on it
Bjrogg
mmattockx:
--- Quote from: bjrogg on March 06, 2023, 11:31:31 am ---It definitely isn’t how I build a bow. I’m definitely not the building to measurements type.
I often get asked for measurements.
Be interesting to see if the really clean wood will
--- End quote ---
BJ, there is nothing wrong with doing it by eye and finger calipers. If you know what you are doing then it will get you a very good bow in the end. Your measurements only work for the wood you have, anyway. For the next piece the modulus of elasticity and strain limits will be different and require different dimensions.
So far I have found that straight grain boards do follow the design numbers very well. Your character wood will also follow the same laws of physics but it doesn't look like it because you have to work around knots, bends and other features that affect how it appears in the end even if the actual width and thickness is to the math.
One thing I have found from using software to do the design is it gets the bend so close to perfect right from the start that my tillering eye has improved when I look at one that isn't bending correctly. This was an unexpected benefit.
Mark
bjrogg:
I agree Mark.
The character ones do follow the rules but it’s more of a find the right average of the numbers and my fingers just seem to be able to compute them automatically. Even though I can’t tell anyone what they are.
Bjrogg
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