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String Tension

Started by , September 30, 2016, 07:13:00 PM

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#40
October 04, 2016, 10:08:00 AM
I have been working on that a lot in the past year...  I make a 62" string which I call a Hybrid...  I am getting a better average lately of about 177 to 183fps...  I just shot a bow Sunday and got 190fps with a 43# bow  -- 410 gr  --  at 29" draw...

#41
October 04, 2016, 10:26:00 AM
Max...  What kind of speeds are you getting and what kind of bow do you make.???

Mad Max

#42
October 04, 2016, 02:16:00 PM
The last one I made was 191 with 10gpp
Static recurve, 8" of reflex

I will finish my new one this month.
hoping for more speed.
I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

#43
October 04, 2016, 06:18:00 PM
Damn...   Are you using carbon??? How many lbs. and what string length.???  How long you been building bows???

die_dunkelheit

#44
October 04, 2016, 07:35:00 PM
QuoteOriginally posted by Mad Max:
The last one I made was 193 with 10gpp
Static recurve, 8" of reflex

I will finish my new one this month.
hoping for more speed.
That sounds like the magic of a static recurve...
How long are the recurves and how far recurved are they?
-Ghost

Mad Max

#45
October 04, 2016, 08:10:00 PM
4" to the bridge and 7" of static
I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

die_dunkelheit

#46
October 05, 2016, 07:37:00 PM
QuoteOriginally posted by Shredd:
Hey Ghost... I am interested in you cast/string angle theory...  If you get some time pm me or post it on the forum... Would love to see it... Its been something I been thinking about recently...
Sorry, I meant to reply to this in my last post..
Yeah give me a day or two to get it written up more clearly so it will make sense.
The short version is it's how string angle affects us in one way when we draw and how it affects the arrow differently in cast.
-Ghost

die_dunkelheit

#47
October 05, 2016, 07:42:00 PM
QuoteOriginally posted by Mad Max:
4" to the bridge and 7" of static
   
That is a fine looking static recurve sir. I'm guessing you laminate the siyah in a jig and then smooth out the tapper before it goes into the limb? At what point in the draw does the string lift off of the bridge?
-Ghost

Crooked Stic

#48
October 05, 2016, 07:52:00 PM
At what point does reflex turn into recurve?   :scared:
High on Archery.

Mad Max

#49
October 05, 2016, 10:54:00 PM
die_dunkelheit  Yes that is how I did it.
first one's were 22/23" now 18/20" off the bridge.
That is a 64" bow, number 4 T/D

number 5 I am going to a 62" one piece, back to my original tip angle and going for 30/32" draw and trying to get more bend at the levers.

Crooked stic ???????

I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

Crooked Stic

#50
October 06, 2016, 06:56:00 AM
Everyone is talking string tension. And has agreed that more reflex gives more tension. So at what point is reflex turn into recurve. So now lower Brace = more tension = better performance or lower brace = more power stroke =better performance or hand in hand ?
High on Archery.

Roy from Pa

#51
October 06, 2016, 07:43:00 AM
I'd say hand in hand. I just build them my way and have never even given string tension a thought!

Mad Max

#52
October 06, 2016, 09:35:00 AM
yea, what Roy said
I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

Crooked Stic

#53
October 06, 2016, 10:39:00 AM
What I was thinking to. Keep it simple!
High on Archery.

die_dunkelheit

#54
October 06, 2016, 11:12:00 AM
QuoteOriginally posted by Crooked Stic:
Everyone is talking string tension. And has agreed that more reflex gives more tension. So at what point is reflex turn into recurve. So now lower Brace = more tension = better performance or lower brace = more power stroke =better performance or hand in hand ?
QuoteOriginally posted by Crooked Stic:
What I was thinking to. Keep it simple!
The point about lower brace was only that it demonstrated that string angle has a greater effect than limb load. The goal should be to be more educated about what makes a bow efficient so that we can achieve above average cast speeds with a given draw weight.

A bow with so much reflex that the tips cross but is whip-ended so the string angle is 90 degrees would cast slower than you could throw the arrow and would also stack like crazy. A bow with no reflex but with a 1 degree string angle would be very fast and would not stack at all. The result? A bow with lots of reflex and tight string angle throughout the draw (recurves) would give no stack and very, very, fast cast.

Reflex affects string angle, recurve affects string angle, recurve is reflex focused at the tips, reflex is recurve spread through the rest of the bow. I don't care how you do it, an understanding of what is going on is my goal here.
-Ghost

Mad Max

#55
October 06, 2016, 06:29:00 PM
die_dunkelheit

"more educated about what makes a bow efficient so that we can achieve above average cast speeds with a given draw weight".

two bows off the same form, one 30# the other 50#
will they cast the same speed with 10gpp ?
I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

Roy from Pa

#56
October 06, 2016, 07:42:00 PM
Maxi boy, mine does. Cause I adjust the 30 pounders string tension higher than the 50 pounders string tension. Nutten but 10 rings.
LOL.. Come on guys, this thread is getting repitious beyond reality.

jsweka

#57
October 06, 2016, 08:10:00 PM
Where's our engineer canopyboy when we need him?    :laughing:
>>>---->TGMM<----<<<<

Mad Max

#58
October 06, 2016, 08:29:00 PM
Be quite Roy
exercise your shoulder and order a dust collector.


  :p
I would rather fail at something above my means, than to succeed at something  beneath my means  
}}}}===============>>

Roy from Pa

#59
October 06, 2016, 08:35:00 PM
No may Maxi Boy. After this thread, I may just quit making bows cause I've been doing it all wrong...   :)

But I need to know, if this tension theory is factual, and is there a calculated fractions factor draw curve I need to implement in there, if I switch between B-50 and FF string? I just love splitting hairs ya know...
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