Entire setup...5.25 lbs

[Vtbow]

Ends were not sealed, btw. Just as they came from rock west. Came in yesterday, I applied some shrink tube, and tested them. I seriously doubt that I over heated them when putting the shrink tube on, but I supposed it is possible.

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Didn't even think of that.

 

[kyler1945]

I had an engineer run some calculations. 250lb person has a safety factor of just over 3 standing with foot against tree on 4” sticking out. You basically do a point load at the center of the section sticking out - center of the load at 2” from tree. When you put weight out at the end of the 4”, that calculation changes dramatically. I don’t have that work complete yet. But I would use extreme care if you’re over 200lbs and encounter scenarios where you aren’t standing on the whole rod.

My personal take on the system, and this is just my opinion, I’m no authority, is that if you’re over 250lbs, or you’re not intending on going slow, methodical, and intend to put your whole foot on the rod before you release your entire body weight on it, it might not be best system.

 

[Nutterbuster]

Ends were not sealed, btw. Just as they came from rock west. Came in yesterday, I applied some shrink tube, and tested them. I seriously doubt that I over heated them when putting the shrink tube on, but I supposed it is possible.

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I have held off on shrink wrapping because that is in the back of my mind as well. I agree with you though that it's a slim chance.

It doesn't surprise me a bit that you were able to break one. I could do it at 170 if I wanted to. I could also walk out right now and snap a predator bouncing on it.

These aren't fat-boy gear. There's a cost and risk associated with ultralite gear. I'm comfortable with it, but encourage everybody to stick within their comfort zones.

 

[kyler1945]

I have held off on shrink wrapping because that is in the back of my mind as well. I agree with you though that it's a slim chance.

It doesn't surprise me a bit that you were able to break one. I could do it at 170 if I wanted to. I could also walk out right now and snap a predator bouncing on it.

These aren't fat-boy gear. There's a cost and risk associated with ultralite gear. I'm comfortable with it, but encourage everybody to stick within their comfort zones.

Haha we ran the calculations for lighter weight peoples too, and the safety factor goes up quite a bit. It is definitely for the size 1's of the world!

 

[BassBoysLLP]

Yeah. I'm not 170. Last time I was 190 I was under 10% BF. 200 lb plus for life


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[blt348]

Dang it! Any others having any issues with the carbon bolts? Maybe it was a bad egg?....even so....

I have #14 6.5” 3/8” carbon bolts from same manufacturer arriving Friday....I’m in the larger sized saddle hunters @ 250 and am now very nervous to attempt!

Any smaller, braver people looking for any carbon bolts....?




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[Nutterbuster]

Dang it! Any others having any issues with the carbon bolts? Maybe it was a bad egg?....even so....

I have #14 6.5” 3/8” carbon bolts from same manufacturer arriving Friday....I’m in the larger sized saddle hunters @ 250 and am now very nervous to attempt!

Any smaller, braver people looking for any carbon bolts....?




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If the price is right, sure!

 

[PJC]

My Carbon bolts came in yesterday. Today I drilled a hole in a tree close to the ground and stood in the bolt. No problem. So I stood on the outside edge of the 6.5" length, again no problem. I began bouncing. No problem. I began bouncing harder. I hesitated to really jump as hard as I could but I was bouncing pretty well. I could see the bolt flexing but it didn't break. I thought for sure it would be bent when I pulled it out but it was as straight as it was when I put it I. The hole.
I go 250in my birthday suit. I think these are going to be alright. SUPER light. Really nice.


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[Vtbow]

I actually think the heat could have effected the strength of the bolt if it was stuck in boiling water, or direct with the heat gun. Also if ends werent sealed and it was dipped in boiling water for the shrink wrap, it could have impacted it even more so. The research I have done shows heat can adversely decrease strength of composites--specifically Carbon fiber and glass fiber. Cold shouldn't make a difference in strength.

Check out Short beam shear testing, Page 42-56 ish of this report. There is one test on glass fiber and one on carbon fiber. Read the summary as well. It concludes that CF shear strength actually increases in strength with decreases in temperature. https://scholarworks.uno.edu/cgi/viewcontent.cgi?article=1169&context=td

 

[BassBoysLLP]

I wonder what they use for carbon fiber firearms. That has heat and strength.

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[Vtbow]

I wonder what they use for carbon fiber firearms. That has heat and strength.

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The carbon fiber barrels I've seen are generally "wrapped" or a carbon lined with steel/chrome etc. They also are generally finished with a fabric weave, not a parallel pultrusion. the weave add significant strength to a fabric whether is is e, s, etc. I also believe the types of {Strength" are different. Shear vs. ?(dont know what a firearm explosion would be Honestly, I think the way to make a super strong CF bolt(if necessary) would be to use a weaved tube with an OD of 3/8 and insert/epoxy with G-flex a pultruded rod with an OD the same as the ID of the tube.

 

[rabidd099]

The carbon fiber barrels I've seen are generally "wrapped" or a carbon lined with steel/chrome etc. They also are generally finished with a fabric weave, not a parallel pultrusion. the weave add significant strength to a fabric whether is is e, s, etc. I also believe the types of {Strength" are different. Shear vs. ?(dont know what a firearm explosion would be Honestly, I think the way to make a super strong CF bolt(if necessary) would be to use a weaved tube with an OD of 3/8 and insert/epoxy with G-flex a pultruded rod with an OD the same as the ID of the tube.

So when you making one?

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[Nutterbuster]

For the curious...

https://saddlehunter.com/community/index.php?threads/bolt-climb-video.9379/

 

[Vtbow]

So when you making one?

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If I put on 75lbs in the next few years and deem it necessary I'll whip some up

 

[blt348]

My Carbon bolts came in yesterday. Today I drilled a hole in a tree close to the ground and stood in the bolt. No problem. So I stood on the outside edge of the 6.5" length, again no problem. I began bouncing. No problem. I began bouncing harder. I hesitated to really jump as hard as I could but I was bouncing pretty well. I could see the bolt flexing but it didn't break. I thought for sure it would be bent when I pulled it out but it was as straight as it was when I put it I. The hole.
I go 250in my birthday suit. I think these are going to be alright. SUPER light. Really nice.


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That is reassuring! I too will test them out close to the ground before implementing them into my arsenal. The ultralight weight and packability is so darn tempting for run and gun! I preset with grade 8 bolts and love it! Thanks guys for the innovation, testing and great community support towards bettering saddle hunting!


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[PJC]

I will say I never jumped up and down on my Grade 8 bolts like that.
One thing I did notice is that it went into the hole very hard at first. I just couldn't get it to slide in. I thought I was going to have an @WHW experience. I put the drill back in and turned it but nothing else came out. I tried the carbon bolt again and it still didn't want to go, and then all of a sudden I hit the sweet spot and it slid in. I think the problem is the sharp edge from the factory cuts. That edge is so clean that it makes its almost sharp and it bites into the wood on the entrance of the hole if you don't have it lined up just right. (Bolts can sometimes balk at going into the hole if you don't have them lined up just right too)
When I got home I took a file and ran the edges along it as I spun the bolt in my hand a few times. That took the edge off. I think they'll slide in better now. I'll let you know.

 

[Nutterbuster]

I actually got my first taste of the bolts not wanting to fit while filming this. Wondering if tougher trees end up with smaller holes? Or if the bolts expand/contract in a meaningful way? Every other setup they've slid right in. This was the first tree I had to actually fiddle with them.

Definitely want to bevel the edges on mine as well.

 

[PJC]

I actually got my first taste of the bolts not wanting to fit while filming this. Wondering if tougher trees end up with smaller holes? Or if the bolts expand/contract in a meaningful way? Every other setup they've slid right in. This was the first tree I had to actually fiddle with them.

Definitely want to bevel the edges on mine as well.

Just don't use a grinding wheel. Too much heat.


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[BassBoysLLP]

I actually got my first taste of the bolts not wanting to fit while filming this. Wondering if tougher trees end up with smaller holes? Or if the bolts expand/contract in a meaningful way? Every other setup they've slid right in. This was the first tree I had to actually fiddle with them.

Definitely want to bevel the edges on mine as well.

Nope. It's all in the tolerances of the carbon rod and tree swell. The thermal expansion coefficient is about 1/3 that of steel.

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[kodiak3842]

Well guys, this one had nothing to do with heat. No shrink tube applied to this. No de-burring or chamfering. Nothing. Straight out of the pkg and into the hole. Same testing.

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