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St. Jude Bow Buildalong
Posted: 15 May 2012 02:04 PM   [ Ignore ]   [ # 16 ]
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outdoorlivin247 - 15 May 2012 12:22 AM

How much to have one made?...Just asking?...


Maybe I should go to bed now!!!

How much 247???lol

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Posted: 15 May 2012 02:19 PM   [ Ignore ]   [ # 17 ]
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Think I may be changing things up already.  Was going thru my wood stack and found some veneer I picked up a while ago.  I think this stuff will be the limbs.  What do you think?

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Posted: 15 May 2012 02:27 PM   [ Ignore ]   [ # 18 ]
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WhitetailFreak - 15 May 2012 02:04 PM
outdoorlivin247 - 15 May 2012 12:22 AM

How much to have one made?...Just asking?...


Maybe I should go to bed now!!!

How much 247???lol

I was well past a 12 pack…LOL

Matt feel free to delete any of my stupid comments that are cluttering up your thread….I do understand and thank you for the time it takes to build the bow and donate it, let alone share it with us here…

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Posted: 15 May 2012 04:04 PM   [ Ignore ]   [ # 19 ]
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Awesome job your doing there matt!!!Can wait to see the finished bow…..I think the way its lookin, it will fit treehugger just fine!!!

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Posted: 15 May 2012 04:31 PM   [ Ignore ]   [ # 20 ]
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So is the auction on this bow live or silent?...

My be fun to see just how much money treehugger is willing to raise!!!! tongue wink

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Posted: 15 May 2012 04:33 PM   [ Ignore ]   [ # 21 ]
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Don’t think I will be able to use that veneer I posted above.  Its just too thin and take a risk of it cracking during glue up.  Will stick with the original plan of the spalt.

While I was waiting for the riser to cook, I got started on the wedges for the limbs.  Those are the thicker pieces of wood right where the limbs bolt onto the riser.  I am making them out of that same light colored wood that is used in the riser.  Here is my jig and the finished pieces.  This is an easy step.



The riser is done cooking and sat out for a while to cool.  I had to grind down a lot of epoxy and then plane and rip down to working size.  Then with another jig, I cut the angles on both sides for the limbs to bolt on.




 

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Posted: 20 May 2012 06:02 PM   [ Ignore ]   [ # 22 ]
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Finally got my new thickness sander up and running.  Now its time to build the limbs.

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Posted: 20 May 2012 08:04 PM   [ Ignore ]   [ # 23 ]
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how long have u been dabbling in bowmaking?.......looks like u got this stuff down to a science eh? look forward to more posts on this thread! absolutely stunning man!

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Posted: 21 May 2012 10:11 AM   [ Ignore ]   [ # 24 ]
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Coon, I have only been doing this for a few years.  I researched these bows for a long time while thinking of buying one.  Thru the research, I figured it would be fun to build my own.  So I did.


Today I am ready to put the first limb together.  Its my last day of vacation so I want to get some progress on this.  These limbs are built from several layers of woods and fiberglass that are from 0.030” to 0.070” thick.  Keeping all these thin laminates uniform in size is pretty important.  Each piece is a certain size and some even are tapered in thickness by 0.002” per linear inch in length.  My new toy below is what I have been waiting for to get these limbs done.  Its a drum sander I can make these lams at the exact thickness I want.  I have been using a standard planer with the blades for a while and it wasn’t the best choice.  It would also destroy a lot of pieces in the process.  This sander makes the job a lot easier and more precise. 


With these limbs, the draw weight of the bow is mainly driven by the thickness of the stack of lams.  There are a few guides out there that will tell you a bow with a .355 stack will give you a 65# draw.  But that doesn’t always work out.  It mainly comes from experience.  My goal for this bow is 55# so I am building a bow that should be designed for 60#.  Its always easier to take weight off a bow then it is to add to it.

Here are all the pieces for one of the limbs laid out and ready for glue.  The form in the back is where all the pieces will go to get compressed and formed.  Will follow up later with the pics of that.


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Posted: 21 May 2012 03:26 PM   [ Ignore ]   [ # 25 ]
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Earlier I got all the lams glued up and put in the form.  Each lam has to have the epoxy spread evenly over the entire piece on both sides to make sure that its all totally glued.  After all the pieces are coated in the epoxy, they are put together and placed in the form.  I wish I could have gotten more pics of this, but I was all by myself and hands covered in the glue and cameras don’t really mix to well.  With all the pieces in the form, a piece of fire hose that is capped on both sides with a air stem like on a tire on one of the caps.  Once the form is all together and bolted together, the fire hose will be inflated and sandwich all the laminates together and squeeze out all the glue and air bubbles (hopefully).  Air bubbles will ruin a bow which happened last year while building the St. Jude bow.  The one that went to the auction was actually the 2nd attempt as the first one had some little air bubbles under the clear glass which obviously showed up.  I didn’t like it so I started a new one.  I did finish the bow and gave it to my dad to shoot.  It works fine, just has a couple little cosmetic flaws.  Now that everything is in the form and compressed, it goes into the oven for 4 hours at 170-180 degrees to cure the epoxy.  After 4 hours, I will let it sit in form for an hour in open air then pull it out of form.  Usually I will let it sit over night but I may get anxious and start sanding on it so I can see what it looks like.

My oven is pretty high tech.  Just a box made from 1” foam and a couple 75w light bulbs mounted on a board that heat it.  After this cook, this one is getting scrapped and will be building a new one just like it.  Its worn out and just needs replaced.



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Posted: 21 May 2012 07:27 PM   [ Ignore ]   [ # 26 ]
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Pulled the first limb out of the form.  Very happy with it and the spalted flamin maple looks better than I thought.  Both sides of the limbs have the same maple under clear glass.

The first couple pics are what it looks like right out of the form.  I then have to sand the edges down flat and remove all that glue. 





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Posted: 10 June 2012 09:46 PM   [ Ignore ]   [ # 27 ]
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Well what I didn’t want to happen, happened.  Almost auction time and bow isn’t even close to being finished.  Finally got time to get back to the bow and less then two weeks to get it done.  Might have a couple days max in these next two weeks to try and finish it.

Everything is built and cut to preliminary shape. 
Got the limbs mounted on the riser.



Once the limbs are mounted, this is the time to tune the limbs and set a weight.  I wasn’t able to get much on tuning done yet, but I am able to put a tight string on it now.  The string you see on the bow now is long and just used for initial minor draws.  At this stage I will work the limbs and make them draw evenly and set the weight about 8 pounds heavier then my goal weight.


 

 

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Posted: 14 June 2012 07:56 AM   [ Ignore ]   [ # 28 ]
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Starting to take shape.



PLEASE DON’T BREAK

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Posted: 14 June 2012 09:52 AM   [ Ignore ]   [ # 29 ]
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Looking great Matt!!!

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Posted: 22 June 2012 07:35 AM   [ Ignore ]   [ # 30 ]
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Well, Its all done….it was anyway.  I was trying to get it shooting just perfect and tweaking it and tweaking it until !!!  SNAP !!!  One of the limbs split on me.  It was my fault.  Oh well, thats the good part about these 3 piece bows.  I only have to built a new piece and not a whole bow.

Here is the bow all finished up before I broke it.




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