Primitive Archer
Main Discussion Area => Bows => Topic started by: Rākau on May 31, 2018, 01:04:54 am
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Hey there Primitive Archer team
Just putting this up for some hopeful feedback, please be ruthless haha.
Kanuka stave selfbow, 68" ntn, aiming for 50# but I don't have any scales so I think I will put this on hold until some scales arrive.
side view unstrung
(https://farm2.staticflickr.com/1760/42468037181_92a5bbe060_b.jpg) (https://flic.kr/p/27GKMTB)20180531_165615 (https://flic.kr/p/27GKMTB) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
belly view unstrung
(https://farm2.staticflickr.com/1736/41745176644_4fa7b88cf3_b.jpg) (https://flic.kr/p/26ASWCU)20180531_165513 (https://flic.kr/p/26ASWCU) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
A wee bit of wonk in the stave, mainly the hump on the left hand side just out of the handle fade and the slight reflex/up sweep on the right hand limb tip, so that is making my tillering job interesting
low brace
(https://farm2.staticflickr.com/1724/42417278422_bbb4c6322c_b.jpg) (https://flic.kr/p/27CgD5A)20180531_174532 (https://flic.kr/p/27CgD5A) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
about 16" from low brace
(https://farm2.staticflickr.com/1735/42417277922_b7e3943207_b.jpg) (https://flic.kr/p/27CgCVY)20180531_173535 (https://flic.kr/p/27CgCVY) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
At this point it was pulling about 20 kg. . . so 44 lbs at 18" before I heat treated (I hung a 20 litre oil container off the string because I don't have scales yet) and I have not measured weight again or re-strung after heat treat.
Also not sure it if it was the correct time to do this but I heat treated both limbs. About 30 mins of constant movement per limb with the heat-gun. There was quite a colour change and a wonderful smell.
before heat
(https://farm1.staticflickr.com/901/40659380770_09315ed327_b.jpg) (https://flic.kr/p/24WVXmo)20180531_160902 (https://flic.kr/p/24WVXmo) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
after heat
(https://farm2.staticflickr.com/1727/40659380000_25fb098010_b.jpg) (https://flic.kr/p/24WVX87)20180531_164400 (https://flic.kr/p/24WVX87) by Zachary Press (https://www.flickr.com/photos/157468780@N02/), on Flickr
Thanks in advance for any feedback or advice that is given. . . as I said, please be ruthless.
Zach
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Looking good.
The heating sounds and looks about right... Take care to keep the heat off the back. I clamp thin slats of timber to the sides, that keeps the hot air flowing along the belly, gives a more even heat and speeds up the process just a tad... mind it's never going to be quick. If it's quick you are doing it wrong (ain't that the truth? ::) )
Del
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Nice bow.
You may use a scale for people
Use a graduated shaft pointing the scale and subtract the bow weight. It's not the more comfortable solution but it works
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Hi Zach
Nice Bow! As you asked for ruthless comments:
I'd maybe do handle a little bit wider.
The whole bending sections seem rather short - if this bow will work out with a 28 draw Kanuka must be great bowwood.
Go on building bows!
Cheers
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Looking good.
The heating sounds and looks about right... Take care to keep the heat off the back. I clamp thin slats of timber to the sides, that keeps the hot air flowing along the belly, gives a more even heat and speeds up the process just a tad... mind it's never going to be quick. If it's quick you are doing it wrong (ain't that the truth? ::) )
Del
haha or you are doing it very right. . . :G
Thanks Del I will give that a go on my next one, I have another stave from the same tree roughed out into a more conventional flatbow shape
Nice bow.
You may use a scale for people
Use a graduated shaft pointing the scale and subtract the bow weight. It's not the more comfortable solution but it works
oh true thanks GlisGlis, I will give that a go if my scales haven't arrived after my trip away.
Hi Zach
Nice Bow! As you asked for ruthless comments:
I'd maybe do handle a little bit wider.
The whole bending sections seem rather short - if this bow will work out with a 28 draw Kanuka must be great bowwood.
Go on building bows!
Cheers
Thanks simk, the handle is 1 1/4" wide, so I'll aim for 1 3/4" on the next one.
oh dear )-w( haha I will put a face shield on when I start pulling it past 20" then! thanks for the feedback.
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Looks great so far. If i had to be ruthless I'd say your levers are too thick.
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Hey Thanks for that aaron, I'll reduce them down once I have her all tillered up (if this stick will bend that far)
Zach
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1 1/4" should be nice for the handle - I obviously was cheated by that pic...
Looking forward for a Kazuka bow now!
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lookin good to me, will agree the levers are looking a little thick, but I know you aren't done yet.
Can you give us some dimensions of the bow?
Steve
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Can you give us some dimensions of the bow?
Off the top of my head its 68" ntn, the working limbs are about 2" wide and levers are 1 " at the moment. I think working limbs are 15" long and levers are 12". Handle is 5" i think. . . I'm away from home for a week so can't remember exact dimensions.
Zach