HELP ??? on design New to forum

[Mad Max]

Hi all (or YALL i'am from the south--- Mississippi)
I'am retired, Tool and Die and Machine work was my trade
I have built about 12 self bows and 3 Fiber Glass bows
This is my first with this design

My new friend that I sent this bow to, said that it is fast, he is drawing 32" and using heavy spine arrows by stuffing saw dust and para cord inside the arrows. 800 grain arrows? 110/120 spine?
arrows are fish tailing. the heaver the better it shoots
I don't know much about bow tuning except what I have read.
I would like your opinion/thought on this bow design and arrows

64" nock to nock
.030 glass back and belly
bamboo floor cores
.030 uni-weft glass core
the levers are 4" from the nock to the bridge and 3-1/2" more to the lever fade ( 7-1/2" Total) The nocks are 8" in front of the grip




7-3/8" brace



28" draw




7-1/2" total lever

[Mad Max]

42# at 28" draw
The arrow shelf is cut to center


I am going to cut the arrow shelf 1/4" past center on the next one

[KenH]

Mad Max. Sorry to say you are posting in the wrong forum. This is the Asian Traditional Archery Research Network, and there is not one thing Asian or Traditional about the 20th century takedown bows you build. Please go bother people in a forum where they care about that sort of thing -- Tradgang for example.

[bheggeseth]

Ken is right, you stumbled onto a very technical forum for horn,wood,sinew composite bows.

That said if you have some interest in Asian horn bows I suggest you browse around and if you see something that catches your eye I would buy Adam's great book which will walk you through building a Turkish composite bow.

http://www.ottoman-turkish-bows.com/

Welcome and good luck.

[Mad Max]

I agree with you


but
we both have sharp angle static tips and high reflex, and arrow spine charts don't mean anything

Just thought you guy's could help

I Guess not

[Pat Menzies]

I see just as much Asian influence in that bow as I do in a Kassai or Grozer glass bow.
Stuffing things into arrows is not going to increase the spine.
Try posting this on the leatherwall.
The design is quite similar to the bows John Fazio(Sovereign Ballistik) used to make and the bows that "Sixby" currently makes.

[Bede]

Judging by the photographs, the bow tips are never fully utilised, which is a problem with many bows attempting to use static tips and modern materials. to get the tips to work efficiently they need a bit more deflex in the unstrung bow shape with the same recurve in the strung bow shape. I have some Harry Drake limbs that come close, but he solved the problem by manipulating laminations fade outs inside the limb.

As commented, stuffing material inside an arrow will only change its weight not its stiffness. If it increases its weight enough, it might even reduce its spine the same way using heavy broad heads does. You might try laminated arrows, though their performance might not be suitable.

[mongolianarcher]

"Don't bother this forum and take it where someone cares"? That comment shocked me! A computer screen does not hinder one's ability to exercise restraint and decency. This man is retired and should be given respect. If there is one thing that "Asian" traditional archery is, it is inclusive. Asia has always been a melting pot of techniques, technologies, and cultures. And such things that are now "modern" is no different. Rather than alienating the poor fellow and basically saying 'get lost' perhaps give him some positive advice. This forum is definitely not JUST for composite bows try counting how many posts talk about Asian traditional replicas like Saluki bows!

[Markus]

Well spoken Mongolianarcher. Markus