Author Topic: ?????? # Depending on Brace Height  (Read 5964 times)

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Offline Hrothgar

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Re: ?????? # Depending on Brace Height
« Reply #15 on: March 07, 2015, 10:28:08 pm »
Visualize this in the extreme using a converse logic. Imagine a 66" string on a 64" bow; technically it isn't pulling any weight until it has been dawn a couple inches, therefore when it reaches a 28" draw the poundage will still be pretty light.
" To be, or not to be"...decisions, decisions, decisions.

Offline PEARL DRUMS

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Re: ?????? # Depending on Brace Height
« Reply #16 on: March 08, 2015, 09:49:14 am »
I don't own a bow that changes draw weight based on its given brace height. I want one though. I think early string tension could get confused for heavier draw weight. The bows shape is exactly the same at say 28" drawn whether its 3" braced or 6" braced. That distance between the throat of the grip and your draw hand never changes at full draw, still 28".
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize we cannot eat money.

Offline bow101

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Re: ?????? # Depending on Brace Height
« Reply #17 on: March 08, 2015, 04:00:30 pm »
Good thing you chimed in; your 2 bits makes it easier to understand for some. 
"The privilege of a lifetime is being who you are."  Joseph Campbell

Offline bradsmith2010

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Re: ?????? # Depending on Brace Height
« Reply #18 on: March 08, 2015, 05:54:11 pm »
if you will weigh you bow with a 3 inch brace,, and then with a 6 inch brace you will see there is a difference :)

Offline bow101

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Re: ?????? # Depending on Brace Height
« Reply #19 on: March 08, 2015, 09:00:02 pm »
if you will weigh you bow with a 3 inch brace,, and then with a 6 inch brace you will see there is a difference :)

Seriously lets put this in proper context, a 3" brace is ridiculously low, I think that most of us are on the same page and think in terms of adequate brace like something between 5 - 7"..   Probably would be a slight increase from 5 to 7 but is it worth quibbling about.  :laugh:
"The privilege of a lifetime is being who you are."  Joseph Campbell

Offline jayman448

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Re: ?????? # Depending on Brace Height
« Reply #20 on: March 09, 2015, 02:37:36 am »
there should be no difference in actual draw weight. itll feel lower to begin with but you will be pulling the same distance and loading the same potential energy. all that changes is string angle (finger pinch) and the bows final resting place (and some argue that a lower brace means higher arrow speed)

Offline Del the cat

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Re: ?????? # Depending on Brace Height
« Reply #21 on: March 09, 2015, 04:59:25 am »
If you think for a moment about the geometry of it*... of course it will make a difference.
The question is "how much"?
The answer is "surprisingly little"
Del

*At high brace the string is a tiny bit shorter. The length of the bow has not changed. Therefore to pull the string back to the same point as before the limbs must be bending more. However, it's a very small difference and string angle changes tends to make this negligible.
Same way as the force draw curve of a bow is surprisingly linear despite all the weird geometry and physics. Some times the maths and physics doesn't actually help.
Del
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