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Main Boards => The Bowyer's Bench => Topic started by: Forwardhandle on June 01, 2019, 09:09:49 AM

Title: Riser length vs Draw weight ?
Post by: Forwardhandle on June 01, 2019, 09:09:49 AM: Im working on a design this morning playing with riser length do any of you guys know does shortening a riser say by 1" have the same effect on draw weight as lengthing the limb 1" ?
Title: Re: Riser length vs Draw weight ?
Post by: Bvas on June 01, 2019, 09:45:12 AM: From my experience, they are close. But changing the limb length has a slightly greater effect than changing the riser length.

You will have the same amount of working limb either way, but will have greater leverage with the longer limb.
Title: Re: Riser length vs Draw weight ?
Post by: BMorv on June 01, 2019, 11:05:31 AM: Quote from: Bvas on June 01, 2019, 09:45:12 AM

You will have the same amount of working limb either way, but will have greater leverage with the longer limb.

My thoughts too
Title: Re: Riser length vs Draw weight ?
Post by: Flem on June 01, 2019, 11:12:01 AM: Quote from: BMorv on June 01, 2019, 11:05:31 AM
Quote from: Bvas on June 01, 2019, 09:45:12 AM

You will have the same amount of working limb either way, but will have greater leverage with the longer limb.

My thoughts too

Assuming the length of the bow remains the same and the riser is shortened, I don't see how you would not end up with more working limb?
Title: Re: Riser length vs Draw weight ?
Post by: Forwardhandle on June 01, 2019, 11:28:01 AM: Thanks guys Ben I relies its a longer limb I was wondering about draw weight differential given working percentages of the fades vs outers Im actually shortening the over all length but decreasing riser length to avoid stack at least thats my guess ! In my OP I mentioned increasing limb length vs shortening riser same diferense as far as length just diferent areas !
Title: Re: Riser length vs Draw weight ?
Post by: kennym on June 01, 2019, 12:11:22 PM: "shortening a riser say by 1" have the same effect on draw weight as lengthing the limb 1" ?"

I have only done an inch on each end but changing from a 60 to a 58 is about 6# and changing riser 2" is about 2#

So the leverage of longer limb has something to do with it but we need an engineer....
Title: Re: Riser length vs Draw weight ?
Post by: Roy from Pa on June 01, 2019, 12:24:24 PM: Ya need an engineer?

Just ask, I'm here to help.

:wavey:
Title: Re: Riser length vs Draw weight ?
Post by: monterey on June 01, 2019, 12:28:10 PM: They ain't talking about model choo choo trains, Roy. :biglaugh:
Title: Re: Riser length vs Draw weight ?
Post by: Roy from Pa on June 01, 2019, 12:37:10 PM: LOL
Title: Re: Riser length vs Draw weight ?
Post by: Forwardhandle on June 01, 2019, 04:17:11 PM: Well I beter get my caboose in gear and give it a go so we can find out got a bunch of maple riser blocks from Kenny today so beter start carving thanks for the info fellas !

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Title: Re: Riser length vs Draw weight ?
Post by: Crooked Stic on June 01, 2019, 04:46:31 PM: I say Kenny is pretty close. Toy Choo Choo enginneer in Pink chaps :laughing: :scared:
Title: Re: Riser length vs Draw weight ?
Post by: kennym on June 01, 2019, 05:17:43 PM: Quote from: Crooked Stic on June 01, 2019, 04:46:31 PM
I say Kenny is pretty close. Toy Choo Choo enginneer in Pink chaps :laughing: :scared:

LOL
Title: Re: Riser length vs Draw weight ?
Post by: Roy from Pa on June 01, 2019, 06:15:42 PM: LOL
Title: Re: Riser length vs Draw weight ?
Post by: Flem on June 01, 2019, 07:39:44 PM: What are you working on Ritchie?
Title: Re: Riser length vs Draw weight ?
Post by: Forwardhandle on June 01, 2019, 08:00:58 PM: :biglaugh:
Title: Re: Riser length vs Draw weight ?
Post by: Flem on June 01, 2019, 08:40:08 PM: Thanks a lot, now I got that song stuck in my head :banghead:
Title: Re: Riser length vs Draw weight ?
Post by: Forwardhandle on June 01, 2019, 08:44:19 PM: Lol sorry Bro ,I'm making a 58" FHLB ,in Kenny's FDC at 58" it was just starting to stack at 31" so I'm decreasing the riser to 13" I was thinking 12" but no room for the sight window ,at 13" it will be shorter but serviceable !
Title: Re: Riser length vs Draw weight ?
Post by: Flem on June 01, 2019, 10:42:15 PM: Your going to have to name it Dinah.
Title: Re: Riser length vs Draw weight ?
Post by: Roy from Pa on June 02, 2019, 06:24:53 AM: Ritchie....

Ah never mind.

LOL