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21
Bows / Re: Bow Testing 2023 / 2025
« Last post by willie on December 13, 2025, 07:04:29 pm »

Willie: The laminated boloodwood semi-recurve had a similar profile like pics 1 & 2 - just less deflex

The laminated yew maple bamboo was a classic asl longbow, 66"


so not much deflex needed to place high on the list?   
Was there any deflex out of the handle with the clasic ASL?
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Bows / Re: Common mistakes in deflex/reflex bows?
« Last post by willie on December 13, 2025, 06:43:22 pm »
My favorite R?D design is more like an R&D with a semi-recurve. I use a very similar form to the one Gary Anderson used. Hard to beat.

Steve, I could not find a Gary Anderson, but can you share specs and a pic the side profile you like?
I can put it into virtualbow and tweak as you see fit.
the pics on top (below) , maybe too mild? maybe does not have the "semi-recurve" you mention?

the bottom pic? too radical?



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Bows / Re: Bow Testing 2023 / 2025
« Last post by simk on December 13, 2025, 06:38:56 pm »
found pics from the bloodwood build on the phone - that was probably from the start of the tillering process - the limbs pull straight later at fd.
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Bows / Re: Rule of thumb for stored energy
« Last post by Badger on December 13, 2025, 06:04:11 pm »
This is an interesting prospect.

What's SEPDF?

 Stored energy per draw force.
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Bows / Re: Bow Testing 2023 / 2025
« Last post by simk on December 13, 2025, 05:51:18 pm »
Yes Tuomo, do only trust your own numbers  :) Maybe there will be another test in 2027. Next year I will have the visitors build a bow with me at the fair.
The fast bloodwood bow was pretty new. I dont even have a pic - passed it to the new owner right after the testing. The Yew/maple/bamboo was maybe shot 200 arrows. The fast yew selfbow was the same as in 2023....because I was interested in how much it lost.... a loss of 1fps is pretty good...the bow was regularly shot in these 2 years.
Willie: The laminated boloodwood semi-recurve had a similar profile like pics 1 & 2 - just less deflex aka set  and was 64.5" ntn - the one on the pic is even shorter and the osage took clear set - nevermind, this is a fine bow to shoot.
The laminated yew maple bamboo was a classic asl longbow, 66"
The yew selfbow was from a natural deflex stave, somewhat 66" - its my personal selfbow
The  next was a osage recurve this year, classic recurve, pretty pronounced and steep hooks, not mine, no pic.
Hickory backed bows always perform poor. Its a massive difference to the same bow backed with boo.   
cheers
26
Bows / Re: Rule of thumb for stored energy
« Last post by Aussie Yeoman on December 13, 2025, 05:14:59 pm »
This is an interesting prospect.

What's SEPDF?
27
Bows / Re: Common mistakes in deflex/reflex bows?
« Last post by Aussie Yeoman on December 13, 2025, 05:03:40 pm »
Ah! I see. You mean #6 here? http://www.primitivearcher.com/smf/index.php/topic,73421.0.html

Or perhaps Post #13 in the same thread?

The D/R bows I've seen that are done well do seem to look pretty much dead straight when braced. I did some analysis of a couple and at full draw the bent limb looks to have the same degree and shape of bend as a straight bow with a ~7 inch brace. Doing that bit of graphics was pretty informative, because an elliptical bow at brace has very little bend at the inner limb. Which is something I probably didn't do well the time I tried.
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Bows / Re: Common mistakes in deflex/reflex bows?
« Last post by Badger on December 13, 2025, 04:54:33 pm »
I was referring to the photos of bows in the other thread about bow shapes. I find that if the limb is straight at brace, I am in pretty good shape, but if it is still showing the dip from the deflex, it is under extremely high tension on the string and will twist itself into a knot.
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Bows / Re: Common mistakes in deflex/reflex bows?
« Last post by Aussie Yeoman on December 13, 2025, 04:50:56 pm »
Thanks Badger, always good to hear from you.

Had you meant to attach a picture or link to one?
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Bows / Re: Common mistakes in deflex/reflex bows?
« Last post by Badger on December 13, 2025, 04:28:21 pm »
     R?D is still my favorite, but not as extreme as shown in the diagram. I have built quite a few like those pictured, and I have had a very high failure rate. My biggest mistake is getting a hinge in the middle of the limb where it just suddenly appears. I believe my biggest mistake on those is trying to go for too much reflex. If the tips are level with the back, they are not too bad to tiller out, but they are a nightmare with a few inches of reflex. My favorite R?D design is more like an R&D with a semi-recurve. I use a very similar form to the one Gary Anderson used. Hard to beat.
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