Another Math Question

[Txhuntr2]

I just had my bowstrings replaced and clearly gained some velocity. My old strings were sighted in. New strings shot 8 inches high. How many FPS did I gain with the new strings?

I did not chronograph either string.

[TexasBob]

Knock moved, peep moved, or both. Unless you had a lady estimate the 8" based on what they have been told. No way new strings gain that much speed.


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[175gr7.62]

You can't correlate point of impact to velocity alone.


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[Fishndude]

Odds are your peep is higher

[Txhuntr2]

I think yall are right, but I was having fun with the math trying to figure it out (as if velocity change was the only variable that changed) and got stuck

[tvc184]

Originally Posted by TexasBob

Knock moved, peep moved, or both. Unless you had a lady estimate the 8" based on what they have been told. No way new strings gain that much speed.


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Close the thread.

[curtintex]

Originally Posted by Txhuntr2

I just had my bowstrings replaced and clearly gained some velocity. My old strings were sighted in. New strings shot 8 inches high. How many FPS did I gain with the new strings?

I did not chronograph either string.

36

[duckmanep]

Originally Posted by curtintex

36

curt is usually correct.

[muzzlebrake]

If new string are shorter than the old stretched out strings that would increase the brace height and shorten the power stroke and reduce velocity??????

[Txhuntr2]

Originally Posted by curtintex

36

Is this based on acceleration by gravity to drop the arrow 8 inches to a target 20 yards away.

I can figure time to drop 8 inches but get stuck after that. Its been a long time since college physics class!

[curtintex]

No sir. I picked a 3 and then I picked a 6. They were right there on the keyboard.

[aggieman08]

Nocking point on new string is lower than old string or your peep sight is higher. Enough said, anymore thought is a waste of time.

[WCB]

Curt is wrong!! It's 32

(For the same reason)

[Txhuntr2]

Fair enough. Guess I'm the only one who likes thought experiments

[Sparkles]

Originally Posted by muzzlebrake

If new string are shorter than the old stretched out strings that would increase the brace height and shorten the power stroke and reduce velocity??????

But with longer string the draw weight would be less since limbs would be more relaxed for lack of a better term thus making it slower


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[curtintex]

Originally Posted by Txhuntr2

Fair enough. Guess I'm the only one who likes thought experiments

Yessir....the rest of us like boobies.

[WCB]

Originally Posted by Txhuntr2

Fair enough. Guess I'm the only one who likes thought experiments

I do not know how to calculate that equation. Didn't get that far... lol

[Txhuntr2]

Originally Posted by curtintex

Yessir....the rest of us like boobies.

If a man only had the capacity to like one thing, boobies isn't a bad choice.

No engineers on here to help me out?

[curtintex]

Originally Posted by Txhuntr2

If a man only had the capacity to like one thing, boobies isn't a bad choice.

No engineers on here to help me out?

Problem is that I can only like one thing at time and during your "thought experiment" I was distracted by....well....boobies.

[Txhuntr2]

Originally Posted by curtintex

Problem is that I can only like one thing at time and during your "thought experiment" I was distracted by....well....boobies.

It's like I'm playing poker with my brother's kids or something.

[curtintex]

Originally Posted by Txhuntr2

It's like I'm playing poker with my brother's kids or something.

Great Tombstone reference.

Now I'm not distracted, so I'm gonna help you. There are simply too many variables for you to ascertain whether or not the new strings gave you increased velocity that led to your arrow striking 8" higher. As stated before, your nock or your peep could have simply not been placed back in the "exact" same place thus causing the errant shot. I've changed strings several times and never realized an increase in velocity....certainly not a noticeable one. So my attempt at humor, (boobies are awesome), was really an attempt to distract you from your "thought experiment" that was gonna leave you with either a headache or the misconception that you'd actually figured something out. You had no idea what you FPS was before so there is no way ANYONE can figure out if you increased in velocity. You stated earlier that you were "having fun with the math" trying to figure it out. My question is "what math"? You're 20 yards away and your arrow is hitting 8" high. What could you possible get from that to determine FPS increase due to new strings. NOW you know why I got distracted by boobies.

[TexMax]

200+ fps if you started around an average hunting setup speed.

**Not an engineer though

[aggieman08]

Originally Posted by Sparkles

But with longer string the draw weight would be less since limbs would be more relaxed for lack of a better term thus making it slower


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If you increase the string length the draw weight increases. If you shorten the cables, the draw weight increases.