« previous next »
Pages: [1]

Author Topic: stacking  (Read 2715 times)

0 Members and 1 Guest are viewing this topic.

Offline JoJoDapyro

  • Member
  • Posts: 2,504
  • Subscription Number PM109294
stacking
« on: January 15, 2015, 07:47:45 pm »
What feature in bow design causes stacking?
Logged
If you always do what you always did you'll always get what you always got.
27 inch draw, right handed. Bow building and Knapping.

Offline PatM

  • Member
  • Posts: 6,737
Re: stacking
« Reply #1 on: January 15, 2015, 07:50:08 pm »
 "Features".
Logged

Offline JoJoDapyro

  • Member
  • Posts: 2,504
  • Subscription Number PM109294
Re: stacking
« Reply #2 on: January 15, 2015, 07:51:26 pm »
 ;D indeed. Features. I'm still new enough to admit it  >:D
Logged
If you always do what you always did you'll always get what you always got.
27 inch draw, right handed. Bow building and Knapping.

Offline Danzn Bar

  • Member
  • Posts: 4,166
Re: stacking
« Reply #3 on: January 15, 2015, 07:56:59 pm »
String angle for one............the closer to 90 deg. between the string and limb at full draw the more "stacking" occurs.  That is why recurves are a smooth draw.
Hope these pictures help.... :-\
DBar
« Last Edit: January 15, 2015, 08:25:01 pm by Danzn Bar »
Logged
Integrity is doing the right thing when no one is looking

Offline bushboy

  • Member
  • Posts: 2,256
Re: stacking
« Reply #4 on: January 15, 2015, 08:01:24 pm »
High string angle,flipped tips reduce it from what I've read.starts with early draw weight and not very noticeable increased draw weight into the full draw.most folks call it a smooth draw.yes I like it!
Logged
Some like motorboats,I like kayaks,some like guns,I like bows,but not the wheelie type.

Offline bow101

  • Member
  • Posts: 2,235
Re: stacking
« Reply #5 on: January 15, 2015, 11:07:31 pm »
Besides limb twisting stacking is right up there on my list things I don't like........ >:D   Great pics D-Bar and explanation.   :)
Logged
"The privilege of a lifetime is being who you are."  Joseph Campbell

Offline Pat B

  • Administrator
  • Member
  • Posts: 37,618
Re: stacking
« Reply #6 on: January 15, 2015, 11:45:53 pm »
Its all about string angle at full draw. When that angle hits 90 degrees the bow stops bending and you're pulling along the length of the limb.  Take a wood ruler or slat and hold it at one end and vertical. Now grab the other end and pull it back. The ruler will bend like a bow. Now hold it horizontal the same and pull the end straight back. No give, ie. stacking! That's pretty simple but it is the same principle. 
Logged
Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Badger

  • Member
  • Posts: 8,124
Re: stacking
« Reply #7 on: January 16, 2015, 02:08:57 am »
  Too low of braced string tension from excessive set will give stacking also, if you don't have enough early draw weight it has to build up faster.
Logged

Offline PEARL DRUMS

  • Member
  • Posts: 14,079
  • }}}--CK-->
Re: stacking
« Reply #8 on: January 16, 2015, 07:56:57 am »
Ive heard some folks say bows stack because they simply don't have the gas in their tank to draw it fully. That's just over-bowed and not stacking.

Pat's description is what I hold to as well. When the bend stops and the pull starts you hit the wall.
Logged
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize we cannot eat money.

Offline Del the cat

  • Member
  • Posts: 8,322
    • Derek Hutchison Native Wood Self Bows
Re: stacking
« Reply #9 on: January 16, 2015, 08:49:13 am »
Poor tiller, e.g whip tiller. Can cause the large string angle.
Beginners often get what I call 'square' tiller with all the bend mid limb, this gives a poor string angle and stacking.
It's one reason I like a full compass arc or circle tiller...  smooth as silk.

The other thing is sometimes people confuse stacking with simple high draw weight. I had a guy try drawing a 90 longbow... he said "you can really feel it stacking"
I said, that's you stacking not the bow!  >:D
Del
Logged
Health warning, these posts may contain traces of nut.

Offline JoJoDapyro

  • Member
  • Posts: 2,504
  • Subscription Number PM109294
Re: stacking
« Reply #10 on: January 16, 2015, 09:08:45 am »
Thanks a lot gentlemen. Helps a lot. My first bow stacks badly. The comparison between 2 bows of close to the same draw weight make it clear that it is stacking, and not just a heavy draw weight. I can draw quite a bit more than what the weight is (54#), but wouldn't like it too much shooting all day. Since my handle popped, and split, I am going to do a bit of work on my first. Thanks once again for clearing up this for me. Onward and upward!
Logged
If you always do what you always did you'll always get what you always got.
27 inch draw, right handed. Bow building and Knapping.

Offline PatM

  • Member
  • Posts: 6,737
Re: stacking
« Reply #11 on: January 16, 2015, 09:15:58 am »
Even if a bow is stacking it still has to be bending if the string is moving. You're just losing mechanical advantage.
Logged
Pages: [1]
« previous next »