Technical Drawings of My Ottoman Bow

leehongyi · Post by **leehongyi** » Thu Sep 05, 2013 9:58 am

can you share your form drawing to me?
My email is [email protected]
Thank you!

nokyay · Post by **nokyay** » Thu Sep 05, 2013 11:26 am

Bjorn, Thank you for reminding..

Leehongyi : I've attached the technical drawing of the form. (I have use U shape iron profile. Thickness of the form is different from drawing)

...and 2d isometric view of the bow...

PAZUZU · Post by **PAZUZU** » Thu Sep 05, 2013 8:46 pm

nokyay,
try to avoid the core of the cornel tree. also the insidious small knots

nokyay · Post by **nokyay** » Fri Sep 06, 2013 12:41 pm

Thank you PAZUZU, but I don't have a better choice.

If you have experience of cornelian cherry, could you please share?

PAZUZU · Post by **PAZUZU** » Sat Sep 07, 2013 9:09 pm

nokyay
I like cornel. hardly worse than maple for kabza. I never use the core, sometimes only part of it remains on top of the handle. I understand you. I also find it hard good cornel wood(diameter not less than 8 cm). does not compromise. because kabza is just as important, as all other parts.

nokyay · Post by **nokyay** » Tue Sep 10, 2013 5:32 am

Thank you PAZUZU for your contribution..

Is there any one to answer :

" Shaping the horn is a little bit difficult in its original shape. Can I boil and flat the horns 4-5 mounths before the gluing to core? Or should I flat them and shape to final dimensions just a few days (or weeks) before gluing? "

Uli · Post by **Uli** » Thu Sep 12, 2013 8:59 pm

I d imagine that the fresh surface is a better substrate for the glue.
In principle its easier to first glue things together and afterwards put the whole to desired shape. in case of horns this possibility is limited

mikekeswick · Post by **mikekeswick** » Fri Sep 13, 2013 5:31 am

Shape them in their original form. Eg. make the strips then flatten them when it comes to grooving.

nokyay · Post by **nokyay** » Fri Sep 13, 2013 7:17 am

Thank you Uli, Mikekeswick..

I have overestimating the core drying time as 4-5 mounths. Now, I have decrease it into 2 mounths.

So my last action plan is;

*Keeping core drying for 2 mounths and then make the sal-grip-sal construction.
*Boil-flat and shape the horns to final dimensions . Within 1 week, glue the horn and core construction surfaces several times and then connect to each other.

mikekeswick · Post by **mikekeswick** » Sun Sep 15, 2013 6:28 am

When you say several times...just make sure that the parts are very well sized with glossy surfaces before actual glue-up.

Uli · Post by **Uli** » Sun Sep 15, 2013 9:05 am

PS: which software do you use for the drawings ?

nokyay · Post by **nokyay** » Mon Sep 16, 2013 6:09 am

Software is NX 7.0