Primitive Archer

Main Discussion Area => Bows => Topic started by: Aries on April 17, 2008, 12:09:24 am

Title: First heat treat
Post by: Aries on April 17, 2008, 12:09:24 am
Well this bow is a few firsts for me. This 62" Osage holds 1/1/2" of unbraced reflex, it pulls 50# at 27".  This was my first attempt at heat treating, and it improved the performance greatly. This 50#er shoots almost as fast as my 60# Osage recurve.  This was also my first asymmetrical design, the top limb is 1/1/2 longer than the bottom, as described in Hunting the Osage Bow. I think i butchered the tiller, but i didn't want to drop the poundage anymore than i already had, I will know better what to expect the next time I try for a bow of this style.   Any tips on tillering asymmetrical limbs would be great ;D   Ty

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Title: Re: First heat treat
Post by: Ryano on April 17, 2008, 12:12:40 am
Looks ok to me, my tip would be dont make your limbs asymetrical......lol.
Title: Re: First heat treat
Post by: Ryano on April 17, 2008, 12:13:27 am
Does that bow have a sapwood back?
Title: Re: First heat treat
Post by: Aries on April 17, 2008, 12:27:57 am
No, It is just low density heart wood, The reds spots are reel wild, they give it a nice leapord look 8).  And curiosity lead me in making the limbs of dif length, Torges ideas sounded reasonable enough..   ;D  Ty
Title: Re: First heat treat
Post by: Dustybaer on April 17, 2008, 02:47:42 am
don't want to sound too critical, but i seem to detect a stiff area about lower mid-limb on your left (lower?) limb.  on the right, the mid limb could bend a little more.  the tip on the left limb seems to travel a little further (but might be the angle of the picture), which should give you a little room to bring the bend out towards the tip on the right, while weakening it to match the left.  but since i'm a newbee, take my words with a grain of salt and listen to the more experienced bowyers on this board (like ryan)  ;D
Title: Re: First heat treat
Post by: DanaM on April 17, 2008, 10:46:06 am
Like ryano said make the limbs the same and some larger pictures would help,
my eyes ain't as good as they usta be. Other than it looks pretty good
Title: Re: First heat treat
Post by: Dustybaer on April 17, 2008, 11:45:25 am
maybe this picture explains better what i mean:

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Title: Re: First heat treat
Post by: GregB on April 17, 2008, 03:06:17 pm
Per Marius example, might be bending a little much on the lower limb just out of the fades?
Title: Re: First heat treat
Post by: Aries on April 17, 2008, 11:08:40 pm
Ya i knew it was off, but i really wanted to keep this bow shootable, and not drop it to far below weight. i will take some more time on the next one before i heat treat.  ty
Title: Re: First heat treat
Post by: OldBow on April 18, 2008, 12:57:57 am
I'd go for broke and gently remove a little of the right belly wood. Might not take too much to even up the limbs. My view is that a bow that is a little under weight but is well-tillered is the goal.
Title: Re: First heat treat
Post by: CutNShoot on April 18, 2008, 08:00:40 am
Dusty bear, how do you make those ovals on the pics if you don,t mind?
Looks okay and sometimes your better off to leave well enough alone! I would shoot it and start another one. ;D
Title: Re: First heat treat
Post by: Dustybaer on April 18, 2008, 08:18:10 am
it's quite simple: open the picture in MS paint (it's part of windows) and select the ellipse tool.  i start in the upper left corner at the same hight with the handle and somewhere above the left tip.  just play around with it, you'll see how easy it is.
Title: Re: First heat treat
Post by: CutNShoot on April 18, 2008, 12:44:49 pm
Thanks Dusty Bear I'll give it a try ;D
Title: Re: First heat treat
Post by: Aries on April 18, 2008, 04:29:00 pm
since i have already heat treated the belly, wouldnt removing belly wood have an adverse affect on the heat treated wood?
Title: Re: First heat treat
Post by: Dustybaer on April 19, 2008, 05:39:20 am
well, you could always heat treat it again.  plus, less draw weight with better tiller doesn't automatically mean a loss of arrowspeed.
Title: Re: First heat treat
Post by: Marc St Louis on April 19, 2008, 07:53:49 am
Nice looking bow.  If you have a finish on it then I would leave it alone