Author Topic: Backed Flatbow Siyahs  (Read 10642 times)

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Offline Wooden Spring

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Backed Flatbow Siyahs
« on: January 30, 2015, 09:37:30 am »
I currently make backed flatbows, but I've been wanting to experiment with some basic siyahs. Can anyone post some pictures of theirs so I can get an idea of what it "done right" is supposed to look like before I goof up a few bows figuring it out?
"Everything that moves shall be food for you..." Genesis 9:3

Offline PatM

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Re: Backed Flatbow Siyahs
« Reply #1 on: January 30, 2015, 09:43:31 am »



Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #2 on: January 30, 2015, 09:46:07 am »
AWESOME!!!!  Just for that, take the next two days off of work!
"Everything that moves shall be food for you..." Genesis 9:3

Offline Aaron H

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Re: Backed Flatbow Siyahs
« Reply #3 on: January 30, 2015, 09:57:35 am »
Really cool Pat.  Thanks for sharing

Offline Aaron H

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Re: Backed Flatbow Siyahs
« Reply #4 on: January 30, 2015, 09:59:28 am »
What type of wood are you working with in these pictures Pat?

Offline DC

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Re: Backed Flatbow Siyahs
« Reply #5 on: January 30, 2015, 10:17:34 am »
I haven't had my coffee yet, but I thought I was looking at a bunch of hockey sticks :-[ :-[

Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #6 on: January 30, 2015, 10:23:25 am »
Looks like hickory and jatoba?
"Everything that moves shall be food for you..." Genesis 9:3

Offline PatM

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Re: Backed Flatbow Siyahs
« Reply #7 on: January 30, 2015, 10:28:17 am »
Ash siyahs, Elm, Bulletwood for working part of bows.

Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #8 on: January 30, 2015, 10:36:52 am »
PatM, I don't have access to bulletwood, but I do have access to Ipe. How does Ipe compare to it?
"Everything that moves shall be food for you..." Genesis 9:3

Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #9 on: January 30, 2015, 10:39:18 am »
PatM, also, it looks like your overlap is 3" with a 4" siyah angled at 30 degrees. It appears to be 3/8" consistent thickness and 1/2" at the overlap. Is that about right?
"Everything that moves shall be food for you..." Genesis 9:3

Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #10 on: January 30, 2015, 10:50:39 am »
Something like this???

Sorry for the crude sketch, but I have to draw something in order to understand it...
"Everything that moves shall be food for you..." Genesis 9:3

Offline PatM

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Re: Backed Flatbow Siyahs
« Reply #11 on: January 30, 2015, 11:14:27 am »
You should just pick a length of splice and siyah length that fits your design. Plenty of room for experimentation.  The picture I posted is actually a four inch splice and a 7 inch siyah.
 The thickness of the splice will be dependent on what it takes to keep that area stiff relative to the draw weight.
 
 Ipe is better in compression but also harder on the backing.

Offline Badger

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Re: Backed Flatbow Siyahs
« Reply #12 on: January 30, 2015, 11:15:15 am »
  Wood, I have only worked with bulletwood maybe 3 times. In my opinion it is just like working with osage but a bit stiffer. Great wood. It is also called beefwood because when you work it it looks like raw beef until the color fades out in a few hours. It doesn't chrysal like jatoba and seems a little more elastic than ipe.

Offline Wooden Spring

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Re: Backed Flatbow Siyahs
« Reply #13 on: January 30, 2015, 11:21:15 am »
Awesome, thanks PatM and Badger. I can't wait to start experimenting!
"Everything that moves shall be food for you..." Genesis 9:3

Offline Springbuck

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Re: Backed Flatbow Siyahs
« Reply #14 on: January 30, 2015, 11:34:03 am »
Badger:  I had it in my head that you used to make a l;ot of bamboo-backed massaranduba bows.

But yeah, ipe is a bit stiffer than bulletwood, but if you haven't used either, bulletwood is PLENTY stiff and strong.  I love it, but can't buy it readily, and tho I have gotten some great stuff off of Ebay, you can't see the grain at all in pics.  Ipe is the same way.  Trouble getting wood without serious grain run-off back to front  is what got me making more selfbows.  I used to lust after beautiful tropicals, but had too many bows slip-fracture on the belly under compression.

Pat does cool work.  I have never splices a siyah like this, and I want to try it, too.  I usually thin the tip of the bow by tapering and then reinforce the belly side with overlaid slats.

Pat:  How is that elm backing made?  Did you actually slice the top layer off a log, leaving the back just like a self bow back, or is it from a board?