130lb tri-lam warbow

[colin1991]

G'day guys,

Progress Photos of one I have in the works.  Target weight is 130lb@32".  Hickory back, Lemonwood core and Ipé belly, 80" nock to nock. Holding about 1 inch of reflex after glue up.

Just rough cut the tapers so far. Will be crowning the back and the rounding the belly in a couple days then I can get a bend in it.

More photos to come.

Colin

[Del the cat]

Sounds like a good plan .
Is the core tapered?
Del

[colin1991]

Nope, core is parallel in this one.  Will have enough meat in the belly piece at the tips so I don't need to taper the core.  Don't have the tools to do it anyway.

[ajooter]

Saaawweeeet....can't wait to see her start bending.  What are your thicknesses on the lams?

[colin1991]

Total stack in the handle is 28mm, 35mm wide. Hickory is around 6, Lemonwood is 5 and Ipe is the rest. I already have one of this,same combo at 140lbs that i could shoot regularly before i messed my shoulder up.

[colin1991]

Right, managed to get a little more work done on this one today.

Crowned the back and then rounded the belly early this morning. Got some nocks cut in and then put the long string on to look at initial bend. (first photo)

Left side looked stiff so I set it as bottom, but still a bit stiff to leave it be so after a little more rasping I evened them out and got the tips bending down to close to brace height.  Pulling about 75lbs at this point and still holding all of its reflex. (second photo)

Made  up a short string for it (FF, 12 strand main and 16 strand loops, breaking stress of 1500lbs) and will get it to short brace and keep tillering tomorrow.

[Del the cat]

I'd get it braced quick else you may run out of draw weight.
I reckon it takes about 60# to brace a 130# bow.
Del

[colin1991]

Its already at 75lb to brace so that would mean its going to be more than 130 going off your theory.  Also brace weight depends on stave characteristics, like the reflex in this one.

Will be on the short string today tho and I have an inch either end I can take off yet if i need to as well.

More photos later today 

[colin1991]

Put a good bend in it this morning.  Pulls 110@32 at the moment so I'll give it a trim and up the weight a bit hopefully. Should be able to push this timber combo as short as 76" ntn but hopefully I wont need to go that short.

Photo is at 30" and left limb is bottom.

[colin1991]

Finished the tiller mid morning... Ended up 77"ntn and 124lbs @ 32"

Next, a good scrape, sand, tips and then finish coats.

Sorry about the back of my head in the photo.

Colin

[ajooter]

Nice looking bend sir can't wait to see it finished.  How are you going to finish the tips?

[colin1991]

Will be putting some nice black horns on the tips mate.

[Badger]

  That looks great, I am just curious what the mass weight of the bow is at this point. My guess would be about 28oz to 30 oz.

[colin1991]

No idea mate, will have to put it on some scales and find out.  With the Ipe in them they get pretty heavy.

I have one here that's made of a hickory back and a native Australian timber called Ironbark as the belly and it was nearly 1.7kg finished.

I would guess this one is somewhere in that range.

[Badger]

  1.7 kg would be about 30 oz