lets talk positive vs negative tiller

[Bowjunkie]

Oh geeze, he we go again  

I'm going to try to wait until I can get to my computer, before I get too crazy with this stuff. It's easier than typing on this stupid smart phone  

George, I use everything I can to make the best bows I'm capable of... including my senses. I would not call a bow well-tillered if it didn't feel perfectly balanced in my hands during the draw and at anchor. I also use pictures at times to verify everything is as it should be, but consistant success breeds trust and confidence in one's methods and tools, so I've learned to trust my tillering tree setup and what It reveals to me.

Your advice is sound, and is what I tell folks if they haven't gone to great lengths to ensure their tillering setups very closely mimic their own actual shooting peculiarities... and/or haven't yet established adequate trust in it.

Stay dusty my friends...

[Roy from Pa]

       

These type threads are always fun..

[Zradix]

Originally posted by Bowjunkie:


Stay dusty my friends...

love it!
lol  

[Echatham]

ok im gonna stir this pot a little     I read somewhere, and it may have been Dean himself, but im not going to research to make sure at the moment, but its been said that an asymmetrical design would be even more advantageous for a bow tillered for 3 under... but im having a hard time putting that together in my mind.  it seems to me, that if my string hand is closer to the geographic center of the string, the more symmetrical the bow ought to be.  thoughts?

[Roy from Pa]

It's not about the geographic center of the string. It's about the static and dynamic center of the bow. And tillering for three under moves your drawing hand closer to the dynamic center than if you were tillering for split finger. But Bowjunkie can explain all this better than I.  

[George Tsoukalas]

Bowjinkie, I love digi tillering though my wife gets sick of taking pictures of me drawing a bow. LOL. Mirrors and windows at night work well also.
My neighbors think I'm weird anyway.  
Jawge

[Echatham]

Originally posted by Roy from Pa:
It's not about the geographic center of the string. It's about the static and dynamic center of the bow. And tillering for three under moves your drawing hand closer to the dynamic center than if you were tillering for split finger. But Bowjunkie can explain all this better than I.    

Right so wouldnt that mean the bow would be better off more symmetrical?

[Roy from Pa]

I'm not an expert on this theory yet myself..    

But with a symmetrical bow with handle center at the center of the bow, the static balance would be the center of the handle or very close to it, depending on the mass of the limbs. If you take that symmetrical bow and cut 1 inch off the bottom limb, that moves the static balance up 1 inch towards the top of the handle. Or in other words, closer to the arrow shelf.. But this theory all depends on how one grips the bow, that's the sticker point..

I told ya not to bring this thread back up, now look what ya went and done?    Shouldn't you be working on a Submarine or something?    LOL

[Bowjunkie]

Roy, cutting 1" off the bottom limb would move the center/static balance point up 1/2". Jes sayin'.

[Roy from Pa]

Ya that's right.. I had the up right..  

[Bowjunkie]

"...its been said that an asymmetrical design would be even more advantageous for a bow tillered for 3 under... but im having a hard time putting that together in my mind. it seems to me, that if my string hand is closer to the geographic center of the string, the more symmetrical the bow ought to be. thoughts?"

Eric, it's true that an asymmetrical design is better suited to the three under string hold than the symmetrical design... if keeping static balance (usually synonomous with geographic center) and dynamic balance in the closest possible proximity are valued. With three under, the asymmetrical design can put the static balance point, string hand fulcrum, and dynamic balance point all in practically the exact same spot. This may well produce the sweetest drawing and shooting bow possible.

In comparison, using a symmetrical design with a three under string hold would move the static balance point down to the center of the handle... which moves it away from the string hand fulcrum a little bit. Not a big deal, it just requires that a slight shift be made during the draw from static to dynamic balance points.

Coincidentally, shooting a symmetrical bow three under offsets the string hand fulcrum from the bow center the same distance as shooting an asymmetrical bow split fingered.

If I HAD to make a bow symmetrical, I would try to make it for a three under shooter... because symmetrical and split moves things too far apart for my liking.... but if I didn't HAVE to, I would elect to use asymmetrical bows for both three under and split holds.

[Echatham]

thank you. that makes perfect sense now.    

[soy]

By how much????On symmetrical vs asymmetrical 1/2"-2" depending on the grip Style and 3 under vs split  

[Echatham]

This is gonna take some graph paper and some deep thinkin.  I gotta get to work on a hunting bow for this season.  Ive decided i dont like the way straight standing bows stack at my draw length so im gonna build me another recurve.