Primitive Archer

Main Discussion Area => Bows => Topic started by: Vgo750 on June 12, 2018, 08:30:36 pm

Title: Question about side to side heat adjustments.
Post by: Vgo750 on June 12, 2018, 08:30:36 pm

Hello all,  I have this Osage stave that needs a pretty good side adjustment to bring it in line.  Below is the rig I tried to use to get some movement in the limbs.  Now I have personally done similar methods and have seen videos where prop twist or thin flipped tips will move with minimal (like 3-4 minutes) heat and some weight on the end and you can just watch the stave move.  I heated the circled area for a solid 12 minutes and got no sideways movement.  I had, I dunno how much weight, 4 clamps in the bucket for weight.  Is the reason because there is so much limb width (1.5”) that it needs steam or just more dry heat to get movement?

(http://i777.photobucket.com/albums/yy54/91mr2_album/7848AC59-DFFA-437C-B032-4E393C8BC538.jpg) (http://s777.photobucket.com/user/91mr2_album/media/7848AC59-DFFA-437C-B032-4E393C8BC538.jpg.html)

(http://i777.photobucket.com/albums/yy54/91mr2_album/E4582046-4621-4ABF-A392-46EEB0B9B2D9.jpg) (http://s777.photobucket.com/user/91mr2_album/media/E4582046-4621-4ABF-A392-46EEB0B9B2D9.jpg.html)

(http://i777.photobucket.com/albums/yy54/91mr2_album/B5A9B0C9-3417-4CC6-AC7A-92FCC9636F45.jpg) (http://s777.photobucket.com/user/91mr2_album/media/B5A9B0C9-3417-4CC6-AC7A-92FCC9636F45.jpg.html)

Title: Re: Question about side to side heat adjustments.
Post by: Eric Krewson on June 12, 2018, 09:56:34 pm

You are trying to bend too much limb. I put a post on my work bench to isolate the area I want to bend. I also put up to 50# of lead in my bucket if I am heating thick stuff, 25# is usually enough.

You could put a block of wood right up against the area you want to bend to support and isolate the area you want to bend.

(https://i.imgur.com/WIpQB83.jpg)

Title: Re: Question about side to side heat adjustments.
Post by: ntvbowyer1969 on June 13, 2018, 11:19:11 am

First step is to get the wood as thin as you can. Get it close to the size/thickness its going to be. For side bending my bow for lining up tips i do not like the weight method. You will have more precise line ups if you heat ,place in vice and just use your hands to bend it straight. I heat the spot to be bent,i then clamp a string to my center line on one side of the stave. I then place in vice and stand at end of stave looking down towards the other end where string is attached. I hold the string on my center line where i am standing and pull the bow side ways until your string runs down center as close as possible. I do all this with the back facing up so i can see my lines on shape lay out.

Title: Re: Question about side to side heat adjustments.
Post by: Pat B on June 13, 2018, 01:47:13 pm

I'd wait and brace the bow first. Looking at the "S" shape of the stave the string might track right over the handle so you won't have to straighten it.

Title: Re: Question about side to side heat adjustments.
Post by: George Tsoukalas on June 13, 2018, 01:50:57 pm

I usually wait until I am done floor tillering.

http://traditionalarchery101.com/fixtwist.html

Jawge

Title: Re: Question about side to side heat adjustments.
Post by: burchett.donald on June 13, 2018, 03:00:38 pm

  +2 on what PatB said...
                                      Don