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bow swap build-along for catamount (finished pics p10)

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Re: bow swap build-along for catamount

Postby Kirkll » Sun Aug 24, 2008 11:41 am

tjdeerslayer37 wrote:if jims using the one limb deal hes been keeping it quiet and not telling anyone. :lol:


i thought that was where you got that design your building TJ...isn't that a "jwills original" ?
http://www.bigfootbows.com/
kirk@bigfootbows.com


Only archers are fool enough to want to make a composite with natural materials and man made materials, and then bend it repeatedly...
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Re: bow swap build-along for catamount

Postby tjdeerslayer37 » Sun Aug 24, 2008 4:27 pm

nope, one limb forms were ginos idearrrss.
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Re: bow swap build-along for catamount

Postby jwillis » Sun Aug 24, 2008 6:34 pm

tjdeerslayer37 wrote:looking good. did you grind down the brown glass yourself?

No, I got this from Bingham's and used it right out of the package. It does look kind of different.

tjdeerslayer37 wrote:oh and did u decide not to put on the osage overlays?? or am i blind and missed em?

I wimped out on the osage overlays and used black walnut. That osage is really bright!

Crooked Stic wrote:Bummer on the form. Where did you get that timer?

I got it from my wife...I think it is for Christmas lights...lol. :)

cst wrote:Was that the result of the air looking to expand when it was heated?

I think so, that and the fact that MDF is not very strong like several have pointed out. I've started putting plywood on the outsides for strength but still using the MDF because it is so straight. Heck, last year I spent $70 on new finish grade plywood for a new longbow form and after painstakingly gluing it up the dang thing was not straight. I can't stand that... made it out of MDF and it was perfectly straight...just put plywood on the outsides and it works great.

Kirkll wrote:do you section off your form doing a one piece bow, one limb at a time, like TJ's forms?

No, I haven't tried that yet.

Kirkll wrote:the one thing that i noticed here that really has me going ......is how everthing in your shop there is spotless... :? :? even your work bench and forms are clean as a whistle.....how do you do that?

It's because I'm a retentive perfectionist...lol :ugeek: .
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Re: bow swap build-along for catamount

Postby cst » Sun Aug 24, 2008 7:54 pm

Plywood exteriors is a good idea. I am kind of a dummy when it comes to this stuff, so when doing your forms you cut the profile on lots of thinner pieces of MDF and then laminate them and hope to keep them square (edge bracing on the squares?) or do you get long bits for a saber saw? Or do you band saw it?

Either way, even with the busted form I am learning lots here.
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Re: bow swap build-along for catamount

Postby tjdeerslayer37 » Sun Aug 24, 2008 8:01 pm

you laminate the pieces of mdf or plywood or whatever, bandsaw it roughly then sand it with a sanding drum, disc, hand sander, sandpaper and block, etc. making sure sides are square to the top of the form. you can make a pattern with 1/4" plywood or plexiglass and use a pattern router bit and attach the pattern to the already laminated mdf or plywood and just run the router along the pattern and it cuts the form. you still have to make the pattern perfectly sanded though.
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Re: bow swap build-along for catamount

Postby Kirkll » Sun Aug 24, 2008 11:30 pm

yup.....what TJ said there....

Jim, that's the trade off using good plywood for forms...you definitely need strong backs on the edges to keep that stuff straight, and sometimes just to get it straight to begin with....i'm seriously thinking of edge banding my keeper forms in aluminum all the way around....i'm seriously thinking of designing an adjustable form using spring steel....that would be bullet proof...but its one of those things i'll never get around to building myself. i don't do much metal work...
http://www.bigfootbows.com/
kirk@bigfootbows.com


Only archers are fool enough to want to make a composite with natural materials and man made materials, and then bend it repeatedly...
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Re: bow swap build-along for catamount

Postby jwillis » Mon Aug 25, 2008 8:19 am

That sounds like a good idea of reinforcing the form with metal. I did this on my longbow form. I think if I was building a lot of bows for sale on the same forms that I would get them CNC-ed out of aluminum or steel billet. I don't know how the big production houses do it, but plywood or MDF just wouldn't stay straight or last very long. Jim
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Re: bow swap build-along for catamount

Postby cst » Mon Aug 25, 2008 1:27 pm

Understood. Thank you.
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Re: bow swap build-along for catamount

Postby jwillis » Mon Aug 25, 2008 1:46 pm

Sixby swears by versa lam or micro lam. I hope to try some of this on my next form(s). Jim
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Re: bow swap build-along for catamount

Postby mike robin » Mon Aug 25, 2008 3:00 pm

on my straight longbow-kids bow form i used 1-1/2"aluminum angle stock on the bottom edge-attached w/ screws and gorilla glue--it actually pulled a small whip out -and straightened it out--next form is getting it too[insurance]--also getting steel pipe liners for the bolt holes-stops elongation[saw that in harrisons book]--i'm afraid of MDF too kirk-we have humid days more than not here in the nor-east most of the year-----mike
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