31" Draw length...

[Shredd]

How do you all feel with someone drawing your 64" ntn R/D bow to 31"??

[Mad Max]

Your recurve should go to 31”
Plenty long enough 👍

[Roy from Pa]

I made two BBO bows for fujimo and he drew 31.5.

Scared the crap out of me pulling one that far but he's had them for years without problems.

[B-JS]

One of my Test-shooters has a 31"ish draw.
No issues with my 60" R/D so far.
I measure my bows and keep track of String angle and stacking. If the bow stacks at let me say 32" ... 31" are No problem.

[Crittergetter]

If it’s a solid design (and I’m sure your is) it Shouldn’t be a problem. 
I have a handful of 62 and 64” bows out there are drawn to 31+.
I have one 62” with 2 sets of Limbs that the guy draws 32”.
Zero issues

[Crooked Stic]

I would think a 64 in. Would be fine. I have one design with a 13 in. Riser .004 Ft.a 58 in. Will go 32 no problem.

[Shredd]

Yeah she should hold up fine... I am concerned about stacking...  At what gain in weight per inch do you consider a bow begins to stack??  I asked this question on another forum and they said it depends on the bow...  I feel that is obvious that bows will feel different but I also feel you could put a number on it also...  I think the boys didn't have a number for it because they do not use or are familiar with numbers...  Some thing in my gut tells me it's gonna be around a half pound gain and I think that could apply that to most bows...  I am also talking about bows in the average weight of 40 to 47#...  I will have to do a test on this since no one has...  I'll ask on FB too to see what they have to say...

[Longcruise]

I consider it stacking when the gain per inch begins to increase and is higher than the previous inch(s).

[Shredd]

I consider it stacking when the gain per inch begins to increase and is higher than the previous inch(s).

   That's very true and I agree... But on the average bow of about 64" by your definition a bow starts stacking around the 20" mark...  By the standard or general definition of stacking is when an archer FEELS a noticeable gain where the draw weight seems to hit a wall...  Usually around or shortly after the 28" mark...

[4 point]

Any R-D longbow of good design should handle 31”s. I set the grip forward a bit on mine to help a little with my draw. My 62” doesn’t even feel bad at 31. As long as you have a consistent poundage gain at the end of the draw cycle it’ll feel fine. When it starts to jump its noticeable on the scale, at least from what I’ve built. If a bow has a flat draw force curve it’ll feel nice on the draw but it’ll be slow and most likely have hand shock. If you can build a bow with a good amount of preload and gain a lot of poundage at the beginning of the draw cycle then level off at the end of the draw to 2 or 2.5 pounds per inch your gonna have a good preforming bow. I haven’t got my one piece longbows to my liking yet but the one I built for the bow swap was better. The takedown I just built seems to preform very well. They are both 64” drawn to 31

[williwaw]

I am concerned about stacking...

what aspect of stacking are you concerned about?

loss of bow efficiency?
the archers perception of a smooth draw?
overstraining the bow?

[Crooked Stic]

When the string angle gets to 90 degrees then you are done. Your limbs are not bending right after that.  If you designed the limb bend to go to 31 in. Then you will be fine. Riser length - forward taper - deflex angle reflex of the limbs all come into play.
So I feel  a 64 bow should have enough working limb to handle that draw.
At your draw if the bow is not about to stack you may not be getting everything out of it.
About like a NASCAR you about to spin out the whole time or your not on the edge.

[Shredd]

I am concerned about stacking...

what aspect of stacking are you concerned about?

loss of bow efficiency?
the archers perception of a smooth draw?
overstraining the bow?

the archers perception of a smooth draw...
overstraining the bow...

[Crooked Stic]

Have you put it on the scale and seen the gain those last inches as compared say 26 to 28 in.  If its hitting the wall then yeah I would worry. If not you prolly be fine.