Primitive Archer

Here's one of the two designs I'm currently playing with. The tips are essentially dead-even with the back of the handle at rest, the limbs pretty straight at brace.

To get this profile, it needs to have an amount of reflex equal to about 80 mm (3 1/4") of reflex on a straight bow. Which I assume would need maybe five inches of deflection during glue up, to account for spring-back.

Now how should I really apply or implement these number into a build? 
The only numbers I care finally is what comes out as fps. The fps do not only include stored energy, but the contracdictory factor: limb mass and inertia.
The build itself works after general principles for me. In dont measure anything. Even if you you understand bow mechanics, bowmaking will only work by specific tinkering.

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.

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

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.