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Main Boards => The Bowyer's Bench => Topic started by: WVbowhunter on March 06, 2016, 09:37:00 AM
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Has anyone ever built a super recurve, some thing similar to a border hex 7? I think it would be awesome to do but would like some advice before I try it.
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The big issue is those big curves put a tremendous amount of twisting pressure on the limbs. Border gets by by using a special carbon on the belly of the bow and they state that what the maximum draw length the bow is warranted for. If you check the FD curve for the Border super curve and compare the amount of stored energy that is transferred to the arrow you will find they are inefficient due to the wasted energy lost in the mid limb flexing during the shot from being overpowered by the big mechanical advantage the big recurves have. Not worth the effort unless you like the feel of the draw cycle.
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Originally posted by WVbowhunter:
Has anyone ever built a super recurve, some thing similar to a border hex 7? I think it would be awesome to do but would like some advice before I try it.
How fast are they
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Not as fast as one would think. 29" draw shot 198fps at 9.66 grains per pound. Kirks bows shoot slightly faster than that.
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mine are not far from that.
My next one may get to 200
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I've seen many Border bows at shoots here in England and I personally don't think they are all that special. It's just that the completion here isn't all that hot and they got in at the start.
If your bow is marked out and cut correctly the stability shouldn't be an issue. Carbon is probably the best bet to help with stability.
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Also I still think carbon is being used in a way that leaves a fair bit of its potential 'unused'.