tag:blogger.com,1999:blog-5493681473159888383.post7990438795172780247..comments2024-03-13T07:41:06.281+00:00Comments on Bowyer's Diary: Shooting the Hazel D Bow & the Archer's ParadoxDerekhttp://www.blogger.com/profile/07654835987876553254noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-5493681473159888383.post-63028847322429256232012-05-12T11:22:52.672+01:002012-05-12T11:22:52.672+01:00What I should have written was "the differenc...What I should have written was "the difference in dynamic spine (40+% increase in point weight from 70 to 100 gn)". My bad. A change in point weight will not affect static spine at all, only the dynamic spine. <br />/Hbeer phoenixhttps://www.blogger.com/profile/08113665834009166561noreply@blogger.comtag:blogger.com,1999:blog-5493681473159888383.post-25434723413147587772012-05-12T07:25:41.644+01:002012-05-12T07:25:41.644+01:00I think the final draw weight is about 35#, but I ...I think the final draw weight is about 35#, but I haven't measured it with the decent string.<br />Going from 70grain to 100 grain isn't 40%, as the point is only a fraction of the total arrow weight.<br />All the spine figures are only really a guide anyway, it depends on arrow length, weight of arrow, weight of point length of arrow etc. If the arrow is long and overhangs the grip this gives the point more leverage to try and keep flying straight and effectively softens the spine.<br />Bothe arrows rub the grip but don't actually 'strike' it. A bad loose or a missmatched arrow will sometimes start flexing and the back end will actually strike the bow with a horrible clattering noise.<br />The width of the bow at the grip is the main factor determining how sensitive to spine the bow will be. Generally a long bow will need an arrow about 10# softer than a recurve and this Hazel bow probably needs softer still. Having said that as long as the arrows are reasonably consistent the archer can correct for the performance. The following Youtube vid is rather good.<br />http://www.youtube.com/watch?v=WzWrcpzuAp8Derekhttps://www.blogger.com/profile/07654835987876553254noreply@blogger.comtag:blogger.com,1999:blog-5493681473159888383.post-73657926958352773252012-05-11T23:08:52.038+01:002012-05-11T23:08:52.038+01:00What was the final draw weight of the hazel bow?
J...What was the final draw weight of the hazel bow?<br />Just out of curiosity (and because I'm re-reading the chapter on tillering according to the mass principle in TBB 4): what is the physical weight of the bow?<br /><br />Regarding the brace height vs efficiency:<br />I have had the same difficulties explaining this to people, nd here's a method that has worked frequently.<br />*State that a bow can only store a given amount of energy. Most ppl don't have a problem with this.<br />*State that a bow cannot use any energy stored below its brace height (as the string can't move any further and thus can't push the arrow. (Most ppl don't have a problem with this either)<br />*Now ask them if they think that a bow that can store "100 units of energy" (an arbitrary figure but effective as it moves away from the field of physics and most ppl will breathe a sigh of relief) will deliver more energy to the arrow if the bracing of the bow uses up 10 (aka 90 units available to the arrow) or 30 units (aka 70 units availabe to the arrow)?<br /><br /><br />regarding the arrows:<br />do they clear the grip/bow without hitting it with both the 70gn and 100 grain points?<br />I'd have thought that the difference in static spine (40+% from 70 to 100 gn) would be too much for both types to clear the bow without one of the two setups striking the grip in flight.<br /><br />/HÃ¥kanbeer phoenixhttps://www.blogger.com/profile/08113665834009166561noreply@blogger.comtag:blogger.com,1999:blog-5493681473159888383.post-64196674170350052872012-05-11T17:04:13.823+01:002012-05-11T17:04:13.823+01:00Thanks for that, it's one of those things that...Thanks for that, it's one of those things that is hard to explain, and I've often ended up feeling like banging my head on a wall!<br />Like most things it's consitency that matters, so I'll soon accomodate the slightkick left. I tried my arrows with the 100gn point, I think they kicked a bit less, but it could just have been me getting used to the bow and my 'inner computer' correcting automatically.Derekhttps://www.blogger.com/profile/07654835987876553254noreply@blogger.comtag:blogger.com,1999:blog-5493681473159888383.post-25982531591041698362012-05-11T16:52:24.318+01:002012-05-11T16:52:24.318+01:00I knew of arrow oscillation, and had a 'feel&#...I knew of arrow oscillation, and had a 'feel' for the paradox; but this is the best articulation I've heard.<br /><br />I just knew my early instruction was to focus on the target, not the arrow, until I met the compound people who had everything but gunsights. Which I found boring.<br /><br />So while my bow is certainly not a primitive and does have a slight inset for the arrow rest; I continue to shot with the Zenlike instruction to 'be the target'.<br /><br />I was going to dust off my bow and the fat, fat arrows it uses, but my rare local park that tolerates bows has an upper limit on draw weight well below my bow. But shooting is calling so I may have to look around.<br />EmmettAnonymousnoreply@blogger.com