Author Topic: Recurve, setback, sinew. My first time with any.  (Read 768 times)

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Offline MattZA

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Recurve, setback, sinew. My first time with any.
« on: May 19, 2019, 12:12:24 pm »
Hi all,

I was hoping you could give some tillering input here before I go any further. I've never tried this shape before, nor have I ever used sinew. This has both.

Any thoughts on where to remove wood? I'll definitely provide more pictures when I've got a second opinion, and cleaned it up some. It still has gross bits of linen everywhere that I'm scared the sinew might raise.

*Edit* As you can see, the sinewing job is clearly my first attempt.

Thanks!
« Last Edit: May 19, 2019, 12:43:39 pm by MattTheClueless »
Unprofessional bowyer. Johannesburg, South Africa.

Offline jeffp51

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Re: Recurve, setback, sinew. My first time with any.
« Reply #1 on: May 19, 2019, 12:37:17 pm »
your left limb is significantly stiffer than the right

Offline MattZA

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Re: Recurve, setback, sinew. My first time with any.
« Reply #2 on: May 19, 2019, 12:41:22 pm »
Thanks Jeff.

I didn't realise it was so significantly stiffer. To my inexperienced eye it was a tiny bit stiffer, but that's all. I haven't really drawn it too much. I'm nervous the tiller is far too out and it snaps.

I'll definitely adjust it.
Unprofessional bowyer. Johannesburg, South Africa.

Offline PatM

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Re: Recurve, setback, sinew. My first time with any.
« Reply #3 on: May 19, 2019, 01:00:17 pm »
your left limb is significantly stiffer than the right

 Have to see it drawn with the arrow nocked correctly to really get the whole picture.

Offline burchett.donald

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Re: Recurve, setback, sinew. My first time with any.
« Reply #4 on: May 19, 2019, 01:18:48 pm »
  +1 PatM, If the right limb in the picture is the upper it may be near perfect drawn in hand with the string angle changing...
                                                                                                                                                                                   Don
   Yank that bow back and lets see a full or partial draw with proper hand and nock placement...
                                                                                                                                                                               
Genesis 27:3 Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison;

Offline Pat B

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Re: Recurve, setback, sinew. My first time with any.
« Reply #5 on: May 19, 2019, 02:30:29 pm »
You can only tell proper tiller at full draw. Draw it slowly and take pics at different draw lengths so you(we) can see how she opens up.
So far it looks good.
Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline MattZA

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Re: Recurve, setback, sinew. My first time with any.
« Reply #6 on: May 19, 2019, 07:11:11 pm »
I'll give it a (eyes closed, heart in mouth) draw as soon as I get home and can take a photo.

It makes me feel good that you all at least don't think the overall shape at least isn't entirely wrong. I've found it quite tough to tiller with all the curves. At 46" and just over an inch wide it doesn't leave much room for error.

How does one keep the sinew down on the tips? Should I wrap them with silk/more sinew/linen where the sinew feathers out?
Unprofessional bowyer. Johannesburg, South Africa.

Offline burchett.donald

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Re: Recurve, setback, sinew. My first time with any.
« Reply #7 on: May 19, 2019, 07:50:35 pm »
  Yes Matt, you can do a sinew wrap at the tips for more insurance...
Genesis 27:3 Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison;

Offline jeffp51

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Re: Recurve, setback, sinew. My first time with any.
« Reply #8 on: May 19, 2019, 07:51:41 pm »
either silk or sinew will work.  If the glue job is right, you shouldn't need much of anything.  by the way , you should have seen my first attempt.  this actually looks pretty good.  what is the draw weight?

Offline MattZA

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Re: Recurve, setback, sinew. My first time with any.
« Reply #9 on: May 19, 2019, 08:17:43 pm »
I'm all out of processed sinew, and I don't want to go to the effort of stripping a whole new one for an optional extra wrap, haha. Silk it is, then. The sinew hasn't lifted, but I had to build underlays onto the tips to keep them static and stable (they're 3/16" wide). So I'd just like to wrap them to 100% keep the whole lot intact.

Jeff, the draw weight is quite tough to tell, since I haven't drawn it yet. My educated estimate is 45# at 24'. That's based on what it drew prior to sinewing, and the amount I've taken off the belly since. My aim is +- 50# at 26". I built it to share with a lady who does horseback archery. She draws 40# at 23", which suggests it's exactly where I want it.
Unprofessional bowyer. Johannesburg, South Africa.

Offline simk

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Re: Recurve, setback, sinew. My first time with any.
« Reply #10 on: May 20, 2019, 11:41:39 am »
that looks very good matt! just don't just remove wood now unless its obvious. you have to exercise the sinew first with patience. the sinew will become less stiff and tiller will change. i'd exersise it a while at the tiller wall and shoot heavy arrows at short draw  (SH) then remove wood...

Offline MattZA

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Re: Recurve, setback, sinew. My first time with any.
« Reply #11 on: May 20, 2019, 10:45:35 pm »
Hey Simon, thanks mate!

Yea I am definitely going to give it a bit of an exercise.

I'd promised everyone a drawn picture, but I braced it and gave it a few pulls yesterday and the tiller kept shuffling around the place. It never went out horribly, but it drifted a bit here and there. So it was impossible to get a reliable photo. I did manage to draw it to around 20" after much exercising though. No drama.

I'm going to shoot it a bit at that short draw and then take a photo again when it settles down.
Unprofessional bowyer. Johannesburg, South Africa.

Offline bradsmith2010

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Re: Recurve, setback, sinew. My first time with any.
« Reply #12 on: May 21, 2019, 10:07:14 am »
what was the weight at 20 inches,, then you can tell where it would be at 23,,

Offline MattZA

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Re: Recurve, setback, sinew. My first time with any.
« Reply #13 on: May 21, 2019, 10:36:16 pm »
*Sad Update*

Unfortunately I experienced my first bow explosion last night.

I was shooting the bow fine, with the draw length slowly increasing, while checking my tiller every few arrows. All was fine. Bow was shooting like lightning. Very little (if any) set.

Turns out there was a 1/4" hairline fracture in the back (over the side edge). I knew about it, but I covered it with extra sinew to protect it. Clearly I didn't protect it enough.

Nonetheless, thanks for all your help throughout. Back to the drawing board. You live and learn.
Unprofessional bowyer. Johannesburg, South Africa.

Offline DC

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Re: Recurve, setback, sinew. My first time with any.
« Reply #14 on: May 22, 2019, 05:02:25 am »
Save the sinew. What kind of wood was it?
Vancouver Island
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