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Author Topic: Weight change  (Read 2467 times)

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Offline DC

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Weight change
« on: April 24, 2015, 02:55:51 pm »
I want to make a light bow, about 30#, for working on my form. If I make a, say, 72" 30# bow can I pike it later to bring up the weight without any problems?
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Offline PEARL DRUMS

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Re: Weight change
« Reply #1 on: April 24, 2015, 03:15:08 pm »
Id make another bow then. A 30# 72" bow will be a total dog.
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Offline PatM

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Re: Weight change
« Reply #2 on: April 24, 2015, 04:46:54 pm »
Quote from: PEARL DRUMS on April 24, 2015, 03:15:08 pm
Id make another bow then. A 30# 72" bow will be a total dog.
  A bow designed to be 30 pounds and 72" with proportional arrows  should not be a dog but the design should preclude it from piking it to gain weight.
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mikekeswick

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Re: Weight change
« Reply #3 on: April 25, 2015, 02:35:55 am »
Quote from: PEARL DRUMS on April 24, 2015, 03:15:08 pm
Id make another bow then. A 30# 72" bow will be a total dog.

Why???

All you need to do to make a long bow work correctly and shoot great is to use an elliptical tiller with a longer than 'normal' handle area or just keep the inner limbs nice and stiff.
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Offline DarkSoul

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Re: Weight change
« Reply #4 on: April 25, 2015, 02:43:30 am »
You could probably pike it later and gain weight, but you won't be gaining much. Maybe 5 pounds or so. Piking it too much might mean that you need to re-tiller the bow, as Mike indicates.
If you want to increase the draw weight by more than 5 pounds, you'd better build a new bow.
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Offline Del the cat

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Re: Weight change
« Reply #5 on: April 25, 2015, 03:54:57 am »
Yeah, I have no problem taking weight off a bow... it's hell's own job to gain a significant amount.
Del
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Offline PEARL DRUMS

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Re: Weight change
« Reply #6 on: April 25, 2015, 08:27:52 am »
What type of wood are you thinking about using?
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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 DC

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Re: Weight change
« Reply #7 on: April 25, 2015, 11:47:59 am »
Ocean Spray and I don't mind re-tillering. I will probably make a light bow. I can see a need for one occasionally and if nothing else I can give it to someone.I was just scraping away at a lonnnng stick and the thought crossed my mind.
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Offline PEARL DRUMS

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Re: Weight change
« Reply #8 on: April 25, 2015, 11:52:31 am »
Ocean spray sure is heavy dense wood. I'll stick with my original hunch.
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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 DC

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Re: Weight change
« Reply #9 on: April 25, 2015, 12:04:41 pm »
It'll be a dog because the limbs would be too heavy?
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Offline PEARL DRUMS

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Re: Weight change
« Reply #10 on: April 25, 2015, 03:50:29 pm »
Depends who you ask.
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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 DaveMac

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Re: Weight change
« Reply #11 on: April 25, 2015, 05:17:40 pm »
I've never piked a bow, but have been thinking about it. I understand that shortening the bow will increase the draw weight because the wood has to bend further, but I can't logically understand how less wood can be expected to do more work. If you took the idea to its n'th degree you would end up underbuilt. Surely when designing a bow you must consider width and depth as well as length. So is piking a legitimate fix or last resort to most bowyers?
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Offline PatM

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Re: Weight change
« Reply #12 on: April 25, 2015, 05:46:56 pm »
Seems like it will just be fishing pole skinny and thus no heavier in mass per draw weight than a proportionally heavier bow.
 
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Offline bradsmith2010

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Re: Weight change
« Reply #13 on: April 25, 2015, 06:38:56 pm »
if you make the handle section longer and whip tiller you can make it shoot good,,
yes you can pike and and get more weight ,,, :)
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mikekeswick

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Re: Weight change
« Reply #14 on: April 26, 2015, 02:55:08 am »
Davemac - it's about leverage. The shorter a bow become the less advantage you gain when pulling the string. So if you just lopped a foot off a bow it would be harder to pull.
The rule of thumb for piking is that 1% of bow length will give you about 5% weight increase.
Pearl no matter the wood species you can make a loooongbow a sweet shooter - make the limbs narrow and use an elliptical tiller, the center of the bow staying stiffer than if it was say a 60#'er. Ask your mate bad Chris...he'll tell ya the same as I am here.
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