Ash warr bow....

[sagitarius boemoru]

Grab a heat gun and adjust the stiffness of weak spots by heat treating the belly. Works like a charm with ash.


J.

[alanesq]

I  did  a lot of experimenting with heat treating ash when I was trying to make a 130lb bow
I found that it quickly dried the wood which changed  its properties significantly but when the moisture content returned to normal (which takes weeks) it returned to how it was before

[sagitarius boemoru]

Its not about drying. Its about hardening weaker spots (or whole belly)  and that can be done. I have made 120# ash bow with aonly about 1´´ net set.
It has to become sticky and change collour to something like hazelnuts. Then the properties of wood change pernamently as the stuff inside of cells cooks.


Jaro

[alanesq]

Interesting - I will have to have another try at this some time

At the time I was hoping it would help stop my bows chrysaling (when I was trying to get past 120lbs) but finally decided it wouldnt help with this
in the end I removed the belly and glued some oak on, this allowed me to get to 165lbs no problem (although this was way heavier than I wanted)
 

[sagitarius boemoru]

Once it starts to chrysalls theres nothing to stop it Alan. I had little of succes of remedy chrysals with heat treating. Deep heat treating - scorch does improve strenght of the belly wood, but the elasticity suffers. This is little of problem with ash, which is too spongy or overelastic for these bows. Also I have found that for ash to perform really well it has to be as dry as hickory.

Jaro

[akila]

Hy guys and thks for all your replays....i wass busy today and jut now i opend my computer....today i done something real stupid.....a beginner mistake... ....i could not take my mind from that weack spot on that right limb....and i thaught i give it a try with the heat gun, and i did something realy realy stupid....i tried to refelx a little that weack spot and the belly of the bow crak on me.....after a fiew seconds a craks apear on the belly and it gows realy deep, so  the bow its history....i will try to make it a target bow....i removed the damaged rings on the belly, and i just have 15mm thicknes to the  limb and the midlle of the bow is still the same...35mm wide and 27 thick...so i think i can make a target bow or something....im so angry at my self....and i always give advises to my friends.." never try to refelx a limb that has taken set, becose the limb could crak"...and i just did that today..... ......i dont know what wass in my mind...i think i wass a little upsot becose i could not make a good tiller to this bow....one limb wass ok...only 2" set....but that right limb wass 4" set....so this is it...aniway i wanna thk. you for your help and i will start another one real soon....im happy  that i had no chrisals on this bow.....but now  the bow its history.... ...

[eduardbilanin]