before/after heat treating

[simk]

I yesterday gave a medium heat treat to a ready tillered bow ( european mountain maple - a spongy rubbery whitewood, similar to silver birch). It was 44#@25" and 1" reflex before, and 44#@22" and 3" reflex after. no tillering.
I thought, I'd share this - maybe someone finds it interesting too     

[Nasr]

Is that unbraced pic after heat treating the shape it holds after a good working in? The outer 1/3 is where it seems to have changed the tiller, that pretty incredible that if it is holding up. Also nice looking bow.

[Nasr]

1/3 of the working limb sorry.

[simk]

that's unbraced profile after first few pulls for the measurments. Not sure how/if it would hold that profile if I just went to higher drawlength now or after another 100 pulls....
I'm aiming to keep most of that reflex tough. I therefore will try to lower drawweight and at the same time perfection the tiller. If I will hit the same 44#25" as before with a 25 gramm/1oz loss of mass, it will be a success  I'm aiming for a 27" draw with around 45#...

yes, set occurred on the 1/3 outers

[bassman]

If the wood is comparable to say White Birch in mass It will lose some reflex profile after being shot in for a while. I deep heat treat right from the start,and end up doing multiple heat treats through the tillering process for woods like Birch. With your same poundage ,and draw length if I get an inch. to and inch,and a half of reflex I am happy, and that is with slighty flipped tips. you may tiller better than me ,and that may make a difference. Good luck, and post the results.

[bassman]

I meant reflex. sorry.

[simk]

I^m quite happy with that little bow. only lost 2" of reflex, keeping 3", now after more than 200 arrows. shooting better than expected.   
https://www.youtube.com/watch?v=8EJ-Th76J24

[scp]

Looking good. How about the length and mass weight? I try to watch the weight carefully for several days. If it increases, I don't pull on it until it stabilizes.

[simk]

thank you. weight is stable 480gramms. she's 64"ntn.

[bassman]

Nice job on that one. Looks like you were freezing your balls off.

[bambule]

Very nice!!!
Bergahorn or Mountain Maple is one of my favorite bowwoods - I don‘t think it is similar to silver birch.
I‘ve build many bows out of it. Heartbreaking works fine but too much heat let the wood get frets.
Your bow shows the possibilities of the wood.

Greets
Cord