Trad Gang

Main Boards => The Bowyer's Bench => Topic started by: YosemiteSam on December 28, 2017, 03:07:00 PM

Title: Tiller Check - Upper/Lower
Post by: YosemiteSam on December 28, 2017, 03:07:00 PM
At the risk of opening a can of worms on even vs positive vs negative tiller, shortened limbs, etc., I'm looking for some input on how this bow tillers to me.  I managed to get my son to take a picture of me with a simple board bow I recently finished.  I've never been able to see how a bow bends with me vs on a tillering tree.  I'm curious what some of you more experienced folks out there can see that would help me improve my tillering.
   (http:// [url=https://imgur.com/EgfXni0] [img]http://i.imgur.com/EgfXni0l.jpg)[/url] [/IMG]  

The specs on the bow are:
65" NTN Paper-backed maple board.
It's just under 1 3/8" wide at the fades, parallel for 16", then tapering.  Last 6" are stiff, parallel tips running about 3/8" wide.  
I made a weak attempt to flip the tips a little but it didn't do much.
Gave it an even tiller with equal limb lengths.  Arrow pass is at about 1 1/4" up from center.
It came to tiller at about 50# but settled in at around 40-45# with a couple inches of set.

This was a mistake that I figured would be another kids bow.  The board was warped so I cut it down more narrow than I'd like.  It sat roughed out in the closet for most of the year until I thought I'd finish it up.  It ended up being a decent shooter by my meager standards but who knows how long it will last.  A 28" arrow just under 600 grains has a point-on range of about 22 yards, which is fun.  I shoot 3-under.

The first thing I noticed was my high elbow.  But the second thing was that the bottom limb seems to be bending more.  My bottom limbs seem to take a bit more set than my top limbs on just about all my homemade bows.  I know that my tillering gizmo read perfectly even before I finished it and that was after about 50-100 arrows ran through it.  But how I bend it looks a little different.

All thoughts are welcome.
Title: Re: Tiller Check - Upper/Lower
Post by: wood carver 2 on December 28, 2017, 06:01:00 PM
I think it looks good.
Dave.
Title: Re: Tiller Check - Upper/Lower
Post by: mwosborn on December 28, 2017, 06:25:00 PM
Quote
Originally posted by wood carver 2:
I think it looks good.
Dave.
Me too.
Title: Re: Tiller Check - Upper/Lower
Post by: Wolftrail on December 28, 2017, 07:53:00 PM
It looks good. I do not tiller a wood bow for 3 under.  Just find that it over stresses the limb.  70% of my Bow breaks occurred with lower limb. Shoot 3 under using glass bows.
Title: Re: Tiller Check - Upper/Lower
Post by: John Malone on December 28, 2017, 08:50:00 PM
I shoot 3 under. You mentioned the high elbow that throws your fingers out of wack also, you have more pressure on the ring finger which is well below center even if the arrow pass is 1.25 above center. If the gizmo test was good and it looked good on the tree it may be the slight form issue causing what you see. If nothing else id get a pic with the form issue fixed and post that one see if it changes. I have a habit of letting my elbow creep upward when I get tired, the bow gets louder and the groups get larger. It has to have an effect on tiller. Its a nice looking bow by the way, looks pretty good.
Title: Re: Tiller Check - Upper/Lower
Post by: YosemiteSam on January 01, 2018, 09:18:00 PM
Thank you all.  'Tis a great board for this casual bowyer.  Very much apppreciated.
Title: Re: Tiller Check - Upper/Lower
Post by: Pat B on January 01, 2018, 10:47:00 PM
The tiller looks good. I don't know much about 3 under. I've always shot split fingers.
Title: Re: Tiller Check - Upper/Lower
Post by: Roy from Pa on January 02, 2018, 12:51:00 PM
Looks awesome..