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Degree of reflex at the tipps

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Thorsten:
Hey folks,
I came across that question while reading through hundrets of pages of bowyers and bowmanufacturing…
How do you judge the degree of reflex when you'r going to bend the end (missing the s , due to the rythm ;-)
Is there a calculation, or contruction ahead?
In took screenshots of a couple of bow's, latest was Dano by Marc Louise, and played with circels and ovals, but couldn't find out the "why this circel, why this oval that long"?

Maybe you can light up the dark corners of my inner head…

Cheers Thorsten

Eric Krewson:
You are over thinking this stuff a bit, most of us just grab an object close at hand that has a pleasing arc like a paint can to trace out a pattern for a future bending form. I have a lot of bending forms; none were calculated arcs but there are probably bowmakers out there that do have carefully crafted forms that were created for the maximum gain in limb efficiency.

George Tsoukalas:
I don't have a form. I use my vice if I decide to add some reflex.
Forms are a  relatively new and I am relatively old. :)
Jawge

bradsmith2010:
If you make a form similar to a bow you like,, its a good starting point,, then modify as needed on your next,, if you make the bend and you not happy,, then you can change it,, till you get what you want,,
or degree of angle,,some guess work involved, ,like all bow making,,or experimentation,,I just copy the best and go from there,,no need to re invent the wheel,,, (-S

sleek:

--- Quote from: Thorsten on January 20, 2023, 05:12:17 am ---Hey folks,
I came across that question while reading through hundrets of pages of bowyers and bowmanufacturing…
How do you judge the degree of reflex when you'r going to bend the end (missing the s , due to the rythm ;-)
Is there a calculation, or contruction ahead?
In took screenshots of a couple of bow's, latest was Dano by Marc Louise, and played with circels and ovals, but couldn't find out the "why this circel, why this oval that long"?

Maybe you can light up the dark corners of my inner head…

Cheers Thorsten

--- End quote ---

Glad to see a guy out here asking questions about what seems to be a process that not many think about. I like to think the parts that are over looked are where advancement can occur.

First I'll say that a circle or oval is the least efficient way to make a recurve. A Siyah is the best. The point of the recurve is to make the string angle at the tips more acute.

With the shortest distance between two points being a straight line, a siyah accomplishes that, vs a curve that has more mass, and we all know mass at the tips is something to be avoided. The construction of a siyah however is tricky and adds mass in the need for the joint. So really  it may be a wash.

In the end, just make your recurve to the height you desire and make it with as little curve as possible to keep the mass down. I Hop that shed some light on the subject.


Edit: after reading reading your question, I may have misunderstood you. I thought you mentioned reflex the tips, you seem to mean the limb in general?

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