Projecting weight

[NOMADIC PIRATE]

I'm in the process of making my first sinew backed bow, I've got a tillering tree, but I'm farely new to it.

I've tillered the bow to 20", I would like to have it in the mid 50#'s st 26" before sinewing it, but I'd like just to pretiller it to 20",...... what weight should I look for at 20" for a projected weight of 55# @ 26"


If this is of any help, the bow is 58" ntn , I didn't flip the tips yet but it has 2" of natural reflex still


Thanks

Manny

[Pappy]

on the low end around 40 high end 45.I usually gain around 2 to 3 lbs. pr.inch.as a pretty good rule of thumb. The las one I did sinew on I tillered it to around 30@15 and then added it but I only put on 2 layers and it picked it up about 8/10 lbs. if I remember right. I did that to give me plenty of wood to correct anything the sinew may change.It wound up 53@26.
   Pappy

[DCM]

3# per inch is the rule of thumb but 2.5# would put you on the safe side considering the middle draw inches generally are a little softer.  So, 55 - (6*2.5) = 40#.  Figure another 5# to 10# of draw from the sinew, although in your climate I'd estimate on the lower side of that.

[NOMADIC PIRATE]

Thanks guys, I think I had it at 40# 20" yesterday,...I was just tempering it now,....WOW so much moisture beading out of the limbs

[Justin Snyder]

Nothing like using a heat gun, with dry heat, to steam a bow.  Justin