That's what I was thinking, but most folks consider a highly reflexed bow unstable. I wonder if the reflex thing is just a side-by-side thing, comparing to equal weight bows.Actually in that particular comparison I think you would have a better chance of having control with 82 pounds than 128 pounds.
The narrow part makes sense, but the efficiency shouldn't come into the stability. Hmm... now I think I'll have to try playing with some static tipped bows... hmmm...I think I read the problem with highly reflex bows is that they are unstable in lighter weights being too narrow or tips too heavy for draw weight but as they become heavier the limbs are wider and the tips proportionally lighter in weight becoming more stable and more efficient.
Very carefully! A slip could result in serious injury w the heavy bows. This limb design is very susceptible to twisting, and if it twisted enough to unstring, serious injury and death could be the result. Stringing could be a two man operation, or special wooden blocks (gong nazi) or peg boards would be used to bend and hold the limbs in increments until fully strung. For the adventurous, a modified step-through w the lower limb on the thigh, pulling the upper limb down, and placing the loop on the lower limb. See: http://www.manchuarchery.org/content/composite-bow-care-and-maintenanceHow do you string that thing up?
Yeah, that's what I want! And I want it in a 56 inch bow at 28 inches...So, if we could figure out how to deal with that twisting trouble, we could have a 40# bow that shoots a 600 gr arrow at 190 fps... that's more power than my 55# bow...
I have some building to do!!!
This is probably what Sid was talking about with a super-recurve. What happens is that at brace you're pulling the recurves straight back (making for a very short bow that's very stout, hence the massive increase in weight right off of brace), but as the recurves open up, you suddenly have a ton of leverage (so the longer the siyahs... the better leverage) which makes the bow suddenly butter smooth at full draw. Hence, tons of stored energy. If the siyahs are light enough (or here, you use a heavy enough arrow) all of that stored energy turns into delivered energy.
So, if we could figure out how to deal with that twisting trouble, we could have a 40# bow that shoots a 600 gr arrow at 190 fps... that's more power than my 55# bow...
I have some building to do!!!
Sid, I'm curious, in a longbow design does increased reflex plump up the FD curve anywhere close to that of a super recurve, or is the design geometry/leverage what gives the design such a fat curve?pretty much it.
even with the lightest limb mass we have ever made, and a stored energy per pound of draw force at 28, of 1.21 meaning a stored energy of 1.21x50lbs = 60.5ft/lbs of energy, we cant get anywhere near that...
all I know is that if the energy is not in the design you cant get the energy out the design. 750grain arrow from a 50lb bow with a sepdf of 1.21 = 190fps with zero loss eg: 100% efficiency.
If we thought it were possible we would have tried it. you would need a very long limb to keep the angles good, and the reason for that is because of the forward preload needed to keep the bulge on the DFC going.Sid, I'm curious, in a longbow design does increased reflex plump up the FD curve anywhere close to that of a super recurve, or is the design geometry/leverage what gives the design such a fat curve?
I'd just be happy to get another 10 fps out of my longbows at 10 gpp:lol: