54" NTN Osge flatbow, sinew?

Started by razorsharptokill, June 16, 2019, 10:16:03 AM

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Pat B

No, TB glues break down at 150deg. The twist may not affect anything adversely. The moisture in the glue and sinew is probably responsible for the twist returning.  If it affects the tiller you can adjust the tiller by thinning the stiff side of the twist. I would wait until it's ready to brace and see what then.
Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

razorsharptokill

Here it is after I have worked on the tiller. Thoughts?
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Roy from Pa

Nice but seems a little flat just outside of the riser on both limbs.

razorsharptokill

Yeah with a bow this short it needs all of the working limb it can get I guess.
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

razorsharptokill

Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Roy from Pa


Pat B

Jim, get a little more bend just above and below the handle. The bend should come into the fades.
Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

Flem

The Bow looks pretty good, but I'm more interested in the Castle looking building in the background.
Thats some interesting architecture.

razorsharptokill

That is a very oddly designed house.
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Roy from Pa

Ole Flem is strangely attracted to odd structures and gadgets:)

:laughing:
:wavey:

Flem


razorsharptokill

#31
I am nearing completion of this bow. I think it will come in at about 48 at 28".  I shot a 30.5" GT 35/55 with a 200 gr point and 150 grains of brass weight behind the insert. It hits about 3" nock right. Stiff I believe. I haven't bought any shafts in a while and I see that they are now spined by deflection rather than a weight range (like 35/55). Is a 500 spine the same as a 35/55?

The bow is close to center shot and I am resting the arrow on the top finger of my bow hand. The bow is sinew backed so it will pick up a few pounds in the winter I suppose. Suggestions?
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

razorsharptokill

Well I discovered that the measurements on my tree were off!   I ended removing more wood up and pulling it past my intended draw length to get to my target draw weight. Probably to almost 29"! Sinew is amazing stuff! So at my draw of 27" it is now right at 37lbs :banghead: When I was still at what I thought was 23" my draw weight would have probably been good. Oh well I think that the sinew will add a few pounds when it cools off outside.

Maybe another layer of sinew would add some draw weight?
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Pat B

Jim, IMO, you have over stressed this bow. I'd leave it as it is and start a new one. Adding more sinew might increase the draw weight but I don't think it will improve the performance.
Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

razorsharptokill

Lesson learned. It will make a good youth bow.
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Pat B

 :thumbsup:  Now, that's the way to think. Pass it on! 
Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

Roy from Pa


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