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String Weight Question...and more...

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Re: String Weight Question...and more...

Postby jwillis » Thu Oct 16, 2008 9:18 am

One thing that I noticed at Ken's was the penetration of the arrows into the target. The arrows from all of the recurves were passing through the target bag and embedding into the oak piller behind it. This may have been due to those risers being cut past center, allowing better arrow flight.

This thread has some very interesting reading about string mass...
http://paleoplanet69529.yuku.com/topic/ ... tml?page=1

Jim
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Re: String Weight Question...and more...

Postby Kirkll » Thu Oct 16, 2008 11:01 am

jwillis wrote:One thing that I noticed at Ken's was the penetration of the arrows into the target. The arrows from all of the recurves were passing through the target bag and embedding into the oak piller behind it. This may have been due to those risers being cut past center, allowing better arrow flight.

This thread has some very interesting reading about string mass...
http://paleoplanet69529.yuku.com/topic/ ... tml?page=1

Jim


i read just the first page and got a brain cramp bro :roll: when badger jumped in there i believe he was refering to Ken/s bow at WTT II . i supose there is merit to studing graphs, computer desin, and applied physics....but its the bowyer in the shop that brings it all into reality, and knows EXACTLY what he did to get there...brings back many memories of the carpenter and the structural engineer... but these guys that were talking engineering dynamics on that thread actually get saw dust in their hair :shock: ....you have to greatly admire a mans opinion that does both... now THAT is WTT in my book..... My hat's off to Badger and OL.

But its really easy to get bogged down with technicalities and not spend enough time doing the physical testing in the shop...i think i'd rather burn up a bit more material in the shop, than anylizing the physics and doing graphs.... you can be a desk jockey...or just go ride the hoss! its all in how much time you got, and how you'd rather spend it i guess....i like reading this stuff and heading out to the shop myself....Thanks for sharing that Jim...i'm going to take two asprin and head back to the shop :? i don't claim to understand half of what these guys are talking about...
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Re: String Weight Question...and more...

Postby jwillis » Thu Oct 16, 2008 1:35 pm

I look at it this way...here's a bunch of engineers with specific interest in archery sharing free technical facts and research and development about bows. I guess I'm just willing to read their stuff and try out a few of their ideas! Jim
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Re: String Weight Question...and more...

Postby Kenro » Thu Oct 16, 2008 2:20 pm

Kirk,
I agree, Thats why in one of my opening paragraphs in the WTT III thread I stated getting your bows to me a slight bit earlier this year so I can get a properly spined arrow matched to the weight of the bow and then run a quick paper test on all of them. Yeah, I'll slice the hairs as thin as you want. would you care for any fries or a soft drink with that? :P :lol:
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Re: String Weight Question...and more...

Postby Hornseeker » Thu Oct 16, 2008 2:39 pm

:shock:
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Re: String Weight Question...and more...

Postby jwillis » Thu Oct 16, 2008 3:29 pm

Kenro wrote:Kirk,
I agree, Thats why in one of my opening paragraphs in the WTT III thread I stated getting your bows to me a slight bit earlier this year so I can get a properly spined arrow matched to the weight of the bow and then run a quick paper test on all of them. Yeah, I'll slice the hairs as thin as you want. would you care for any fries or a soft drink with that? :P :lol:

A pulled pork sandwich and baked beans like last year was awesome! Thanks. Wait a minute...FD said he was grillin, right?! :lol:
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Re: String Weight Question...and more...

Postby Kenro » Thu Oct 16, 2008 8:37 pm

Oh yeah, wait till you see the monster chicken rottery thingy he has conjured up. pretty freeken cool!!!
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Re: String Weight Question...and more...

Postby Kirkll » Thu Oct 16, 2008 10:07 pm

Kenro wrote:Kirk,
I agree, Thats why in one of my opening paragraphs in the WTT III thread I stated getting your bows to me a slight bit earlier this year so I can get a properly spined arrow matched to the weight of the bow and then run a quick paper test on all of them. Yeah, I'll slice the hairs as thin as you want. would you care for any fries or a soft drink with that? :P :lol:


i missed that part Ken....cool beans! i'll pass on the fries and a soft drink.... as long as i have pot of coffee close by i'm a happy guy... :D

Jim, i can appreciate where your coming from regarding the reading materials .... no offense intended there at all... i read the stuff myself sometimes when the mood strikes me.... i just had way too many years and tears arguing with bone head structural engineers in the construction industry. unfortunately there are no requirements for those guys to actually try and build some of the crap they come up with. :roll: so i've got a bit of an edge on in the engineering department......if they can walk the talk, i'm all ears with my hat off...
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Re: String Weight Question...and more...

Postby jwillis » Fri Oct 17, 2008 11:41 pm

There is more interesting reading over there about strings, and test results reported from some folks you will recognize and respect. Apparently, string aerodynamics also play a significant role in performance.
http://paleoplanet69529.yuku.com/topic/16901?page=5

Bottom line is...string stretch, creep, mass and diameter make a big difference. Stiffer, lighter and smaller are faster. In order to level the playing field, we really need to test all bows with the same strings!

Jim
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Re: String Weight Question...and more...

Postby Hank » Thu Oct 30, 2008 9:11 am

I thought Rod Jenkins did a test and came up with if the string weights were the same, the speed was the same. So if you took a B 50 string that weighed XX and a D 97 string that weighed XX, the speed would be the same.
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