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Main Boards => The Bowyer's Bench => Topic started by: BrushWolf on December 04, 2016, 10:18:00 AM

Title: I beams
Post by: BrushWolf on December 04, 2016, 10:18:00 AM

I have been putting a hidden fiberglass beam in my recurve handles. My question would one see a difference in strength using  thin phenolic instead of fiberglass. I feel the fiberglass is better just harder on tools.

Title: Re: I beams
Post by: kennym on December 04, 2016, 03:44:00 PM

I think the glass would be stronger, phenolic in a strip isn't nearly as stiff as glass the same thickness.

No actual testing here tho, just gut feeling....

Title: Re: I beams
Post by: BrushWolf on December 04, 2016, 05:39:00 PM

Thats what I am thinking also kenny.

Title: Re: I beams
Post by: Mad Max on December 04, 2016, 06:00:00 PM

me too

Title: Re: I beams
Post by: mikkekeswick on December 05, 2016, 12:52:00 PM

Me too!
Obviously you could use a thicker piece of phenolic to get the same strength.

Title: Re: I beams
Post by: LittleBen on December 05, 2016, 09:28:00 PM

Fiberglass is glass fiber reinforced polymer .... phenolic is linen or canvas or paper reinforced polymer ... granted they're different polymers, but there's really no comparison in terms of stiffness and strength.

Title: Re: I beams
Post by: Wagstaff on December 17, 2016, 02:15:00 PM

We like using G-10..  Its super tough, available in various thickness, and a range of colors too.  Oh.. and it makes a great limb tip.

   G-10   (http://masecraftsupply-com.3dcartstores.com/G10-18-inch-thick-sheets_c_239.html)   Link

Title: Re: I beams
Post by: Dmaxshawn on December 19, 2016, 10:16:00 AM

I use the G-10 in my bows.  Super rigid and adds more mass than the glass or phenolic.

Title: Re: I beams
Post by: Buemaker on December 20, 2016, 02:35:00 PM

Here is one I beam I made from Lignostone, a very strong material.
  (http://i1289.photobucket.com/albums/b506/timian46/image_zpsh2npfdlz.jpeg) (http://s1289.photobucket.com/user/timian46/media/image_zpsh2npfdlz.jpeg.html)