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Author Topic: osage hunting bow, hollow limb design, 85/26 (No. 8)  (Read 11883 times)

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Offline simson

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osage hunting bow, hollow limb design, 85/26 (No. 8)
« on: September 16, 2012, 05:25:41 pm »
Here is an osage hunting bow with static recurves and hollow limb design.The stave was a nice coloured piece with some areas of several pin knots, but still holding up so far without problems. Recurves are steam bent, selfnocks no overlay, handle buckskin leather, bends slightly in the handle. Simple stick.
cross section is a pipe section (right word?)  and runs into a triangular section at the levers.

Specs:
57" ntn
4,5" bh
26" dl
85# dw
608g mass total
4" handle
3" levers
41/19 mm just below grip
43/15 mm midlimb
28/12 mm below levers

enjoy













« Last Edit: December 19, 2014, 03:50:21 am by simson »
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Simon
Bavaria, Germany

Offline SA

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #1 on: September 16, 2012, 05:31:29 pm »
nice bow , good tiller, i guess i have not seen one w/the limbs hollowed out what are the benifits of that type of tillering?
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Shawn Acker

Offline Hunter Van Winkle

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #2 on: September 16, 2012, 05:40:44 pm »
Very beautiful bow. I will be making one similar, soon.

Did you add the reflex in the thickest part of the levers?
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Offline simson

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #3 on: September 16, 2012, 05:51:33 pm »
Hunter: I always bend my recurves with extra wood (thickness) and work it down when shaping the levers. Hope I could answer your question ...
At the curve is most of the wood to stiffen it to static recurves

simson
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Simon
Bavaria, Germany

Offline Hamish

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #4 on: September 16, 2012, 10:55:21 pm »
Nicely made bow, interesting cross section. Is it significantly harder to tiller?
    Hamish.
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Online Pappy

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #5 on: September 17, 2012, 10:14:34 am »
Great looking bow,cool design. :)
   Pappy
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Offline Parnell

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #6 on: September 17, 2012, 10:47:07 am »
Looks good - probably the heaviest osage bow I've seen.  Any concern about the "dings" on the back and it letting go over time?
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Offline Jodocus

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #7 on: September 17, 2012, 10:50:28 am »
A beauty AND a beast!  ;D
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Offline Tom Leemans

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #8 on: September 17, 2012, 11:17:30 am »
Love those lines!
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Offline coaster500

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #9 on: September 17, 2012, 11:47:18 am »
Very nice bow!!

Was 85#s your target weight? Tell us more about the purpose of the design. It looks like it worked out very well but what are the advantages?

Does this design give you more speed? Take less set? I mean 85@26 and only 57"s?

Very curious??
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Inspiration, information and instruction by the ton and it's free,,, such a deal :)

Offline Del the cat

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #10 on: September 17, 2012, 12:22:42 pm »
Great looking bow.
Lovely limb shape, certainly qualifies as 'primitive'.
I'll bet that belly feels nice to your thumb.
Del
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Offline Gordon

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #11 on: September 17, 2012, 12:26:41 pm »
That had to take a considerable level of skill to tiller that way. Amazing!
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Gordon

Offline Carson (CMB)

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #12 on: September 17, 2012, 01:02:42 pm »
I love this bow.  The stats are very impressive.  The design is something I have been wanting to see or try myself.  Seems it would add lateral limb stability and really make use of osage's compression strength.  I am dying to know how fast/far, does that bow shoot? Or just your opinion as compared to your other bows.
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The humanities grew out from archery as a flower from a seed
No sooner did the soft, sweet note of the bow-string charm the ear of genius than music was born, and from music came poetry and painting and..." Maurice Thompso

Offline simson

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #13 on: September 17, 2012, 03:31:32 pm »
Thanks everybody for comments!

sa: the benefits of hollow limbs are lower mass, compare a rectangular (cross section) piece of any material with a curved one ( kinda section of a pipe. Which one would be stiffer?
Please see the fantastic site of OL Adcock   (http://bowmaker.net/index2.htm), he can it explain a lot better than I. Also interessing his statement about bow tuning.

I will post another with this hollow limb design in an other thread


Hamish: IMO it is a bit harder to tiller than an other cross sections

Parnell: I don't know what you mean with 'dings'. perhaps you have seen the print from my recurve jig?

coaster: I can shoot 85#, but here is my personal limit. Normally I draw 28-29 on target shooting. This bow is made as hunting bow. It shoots hard and very fast, can not say the fps - I have no chrono. But compared with other bows I estimate its over 180 (750gr arrow). The bow is short, but it bends through the handle

Del: The handle is upholstered with a thich leather strip for comfort

Gordon: Thank you for all the inspiration I got from your work

CMB: please see above


Again thank you all
simson

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Simon
Bavaria, Germany

Offline NruJaC

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Re: osage hunting bow, hollow limb design, 85#/26"
« Reply #14 on: September 17, 2012, 03:58:22 pm »
Thanks for the pointers on the hollow/concave limb design. If you're up to it, you should do a build along that shows both the design and construction process for such bows -- do you just round the back and invert the belly? How do you find the correct radius? Do you use a special tool for tillering? Etc., Etc.

It's a beautiful bow and you should be extremely proud of it.
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Arjun from Reston, VA
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