STS arrow speed loss

Boo · Post by **Boo** » Fri Mar 28, 2008 9:20 pm

There ain't any!!! LOL! I tested any and all of my strings I had around with and without and there is no speed loss. Apparently the arrow leaves the string by the time the string reaches the brace height. Makes sense because logically the string has to decelerate after the brace height.
Just a FYI.

Grizzly Adam · Post by **Grizzly Adam** » Fri Mar 28, 2008 9:27 pm

Good to know, Boo!

What do you find about noise and vibration reduction?

wabi · Post by **wabi** » Fri Mar 28, 2008 9:50 pm

I found no changes in POI with the STS installed, so I was guessing the velocity was very close with/without.
Good to have confirmation!

BTW - I would guess with a vert bow and snap-on type nock it might actually increase arrow speed slightly since the nock would detach from the string at the end of the power stroke and not be decellerated by the string slowing down after the end of the powerstroke (overtravel). Just a guess, though.

xbowking · Post by **xbowking** » Fri Mar 28, 2008 10:11 pm

I think i will put an STS on my crossbow, soon as i get a few extra bucks, how much are they around $40-$50 ?

Boo · Post by **Boo** » Fri Mar 28, 2008 10:13 pm

wabi wrote:I found no changes in POI with the STS installed, so I was guessing the velocity was very close with/without.
Good to have confirmation!

BTW - I would guess with a vert bow and snap-on type nock it might actually increase arrow speed slightly since the nock would detach from the string at the end of the power stroke and not be decellerated by the string slowing down after the end of the powerstroke (overtravel). Just a guess, though.

That seems logical to me Wabi. Another great thing about any STS is the consistency of the release. Clean and at the same time no mater what the temperature, humidity, string speed etc

globemountain · Post by **globemountain** » Fri Mar 28, 2008 10:24 pm

Are there any negative issues with the STS and post shot limb vibrations or anything.......

TYE · Post by **TYE** » Fri Mar 28, 2008 10:33 pm

Think I'm gonna eventually get one for my compound.

wabi · Post by **wabi** » Fri Mar 28, 2008 10:46 pm

globemountain wrote:Are there any negative issues with the STS and post shot limb vibrations or anything.......

As far as I can tell they reduce limb vibration since they stop the string at the most relaxed point of limb travel. I believe that is the reason they reduce noise/vibration (recoil) so effectively. The string does not travel past the brace height position, so they eliminate that oscillation.

Sand rock · Post by **Sand rock** » Fri Mar 28, 2008 11:04 pm

I put a sts on a Equinox after about 50 shot the impact of the arrow at 50 yards was the same and it was a little quiter . I have ordered a 48 strand Boo string hope it makes things real quite. Idont think you will find a more helpful person than Don.

Boo · Post by **Boo** » Fri Mar 28, 2008 11:43 pm

Thanks Sand rock!
I believe you are right Wabi. The way I understand it is that the string oscillation is energy which is moving the string back and forth and is converted into mechanical energy into the air. Moving air is noise. The STS absorbs that energy which means that the energy goes into the stoppers rather than the air. All this means is less noise and protection in the case of a dry-fire.

Big John · Post by **Big John** » Sat Mar 29, 2008 11:30 am

Protection in case of dry fire is worth the price alone.
Helping quiet and lessen vibration are added bonus's.

Fishn-Hunter · Post by **Fishn-Hunter** » Sat Mar 29, 2008 11:44 pm

How are the sts mounted? I have an older exocet 175 like around 1995 or 96 would I need to drill and tap or do they mount on existing hole's?
Fishn-Hunter

Northern · Post by **Northern** » Sun Mar 30, 2008 10:31 am

What is a STS?
Darrin

Esox · Post by **Esox** » Sun Mar 30, 2008 11:22 am

FYI- For those that want more information here is STS Excalibur String Suppressor.....

http://www.bowhunterssuperstore.com/exc ... -7003.html

Boo · Post by **Boo** » Sun Mar 30, 2008 11:34 am

Northern, an STS is a string stopping system.
Ian, you can see where the hole is in the rise if you check the link.
http://www.excaliburcrossbow.com/phpBB2 ... hlight=sts
I looked at my old carved tipped Exocet and you can do it but you would have to drill through a webbing that I am sure shouldn't be drilled through.

I mocked the STS on my old beast so you can see what I mean Ian.
I left some room between the rail and the STS for the cocking hooks.[/img]

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STS arrow speed loss

STS arrow speed loss

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