41
Primitive Skills / Re: A simple leather project
« Last post by M2A on December 11, 2025, 02:22:07 am »I like it! Good way to make something useful and appealing from those small pieces
Mike
Mike
Recent Posts
42
Bows / Re: Snake bow
« Last post by M2A on December 11, 2025, 02:11:04 am »Interesting idea thinning the outside of those turns. Makes sense. I’ll have to keep that in mind when I take on some of the snakey staves I have collected. Sharp looking bow!
Mike
Mike
43
Bows / Re: Osage Selfbow
« Last post by M2A on December 11, 2025, 01:54:12 am »Congrats! You been putting out some real nice work. Enjoy seeing your work. Best wishes on a speedy recovery.
Mike
Mike
44
Primitive Skills / Re: A simple leather project
« Last post by Pat B on December 11, 2025, 12:43:27 am »Nice work, Brian. Form and function. 
45
Bows / Re: Black locusts bow
« Last post by Selfbowman on December 10, 2025, 07:52:43 pm »Day five 32.1 will check it for three more days to see if it changes.
46
Primitive Skills / Re: A simple leather project
« Last post by Pappy on December 10, 2025, 07:23:17 pm »Nice BJ , looks like you are pretty good with leather to me. Pappy
47
Bows / Re: The best shape for a reflexed bow?
« Last post by Badger on December 10, 2025, 07:14:54 pm » Are you saying shorter bows store more energy? I believe this to be false I have never seen anything to support this.
Shorter bows automatically store more energy - this we know - and also that reflex is another key factor. Now we have same length and same reflex. So the small differences we see come from the sideprofile (and tiller)
I would agree that short bows tend to be more efficient. Many here will agree that right about 67" is an optimum length. .
Shorter bows automatically store more energy - this we know - and also that reflex is another key factor. Now we have same length and same reflex. So the small differences we see come from the sideprofile (and tiller)
I would agree that short bows tend to be more efficient. Many here will agree that right about 67" is an optimum length. .
48
Bows / Re: The best shape for a reflexed bow?
« Last post by sleek on December 10, 2025, 06:16:26 pm »yes, Tuomo, I had around 50 or so different bows from different bowmakers on the shooting machine....maybe post that in a seperate thread, its sure interesting.
How do you optimize the front profile
The longbow is self stabilizing when strung - you can make it as narrow as you like without getting into stability issiues. A recurve needs a certain width at its base. At the same spot the longbow can be made much narrower resulting in a different top profile and mass difference. Your experiment does not take in acount relevant specific characeristics of the design. Namely the lighter limbs of a longbow, and the extra mass of recurves. If we compare the experiment with reality we also must say, that you put recurves mainly on shorter bows - 68" is a bit long to make a recurve.
But this is all about fps. If we only talk about stored energy and sideprofile and leave the fps aside, this a very good experiment.
Shorter bows automatically store more energy - this we know - and also that reflex is another key factor. Now we have same length and same reflex. So the small differences we see come from the sideprofile (and tiller).
Maybe Tuomo could upload the force-draw-curves? Visualizing the stored energy? Maybe we see a nice hump in the curve of the d/r?
And Tuomo: Do these bows all have same length of string? Any Differences?
Gettin' curious again
Do you still have the shooting machine set up? Im very interested in your experiments, please do post it, here or on another thread.
49
Bows / Re: The best shape for a reflexed bow?
« Last post by simk on December 10, 2025, 05:33:45 pm »yes, Tuomo, I had around 50 or so different bows from different bowmakers on the shooting machine....maybe post that in a seperate thread, its sure interesting.
How do you optimize the front profile
The longbow is self stabilizing when strung - you can make it as narrow as you like without getting into stability issiues. A recurve needs a certain width at its base. At the same spot the longbow can be made much narrower resulting in a different top profile and mass difference. Your experiment does not take in acount relevant specific characeristics of the design. Namely the lighter limbs of a longbow, and the extra mass of recurves. If we compare the experiment with reality we also must say, that you put recurves mainly on shorter bows - 68" is a bit long to make a recurve.
But this is all about fps. If we only talk about stored energy and sideprofile and leave the fps aside, this a very good experiment.
Shorter bows automatically store more energy - this we know - and also that reflex is another key factor. Now we have same length and same reflex. So the small differences we see come from the sideprofile (and tiller).
Maybe Tuomo could upload the force-draw-curves? Visualizing the stored energy? Maybe we see a nice hump in the curve of the d/r?
And Tuomo: Do these bows all have same length of string? Any Differences?
Gettin' curious again
How do you optimize the front profile
The longbow is self stabilizing when strung - you can make it as narrow as you like without getting into stability issiues. A recurve needs a certain width at its base. At the same spot the longbow can be made much narrower resulting in a different top profile and mass difference. Your experiment does not take in acount relevant specific characeristics of the design. Namely the lighter limbs of a longbow, and the extra mass of recurves. If we compare the experiment with reality we also must say, that you put recurves mainly on shorter bows - 68" is a bit long to make a recurve.
But this is all about fps. If we only talk about stored energy and sideprofile and leave the fps aside, this a very good experiment.
Shorter bows automatically store more energy - this we know - and also that reflex is another key factor. Now we have same length and same reflex. So the small differences we see come from the sideprofile (and tiller).
Maybe Tuomo could upload the force-draw-curves? Visualizing the stored energy? Maybe we see a nice hump in the curve of the d/r?
And Tuomo: Do these bows all have same length of string? Any Differences?
Gettin' curious again
50
Bows / Re: Snake bow
« Last post by bjrogg on December 10, 2025, 05:00:39 pm »Gotta agree with Badger.
Looking good Arvin
Bjrogg
Looking good Arvin
Bjrogg