I was wondering--do you have to up in spine with footed shafts? The way I was thinking (yeah, yeah--I know), the foot might act like a heavier point, so you would need to go with a heavier spine. Any opinions/info./input on this?

By the way Bob, they can go up to 35" on the footed ones at RRA.

Chad

Long Bows Rule!

Cool, thanks LBR, I've been waiting a while for RRA to make them. I'll get a few at 34-35 inches and cut them down as needed to get the best tune possible. I really don't know too much about the spine issue, but it would seem the spine would actually be a little stiffer with the footed shafts then usual. That would really be a question for RRA.

Chad,


I don't have to change spine with footed shafts. But, as you know I have a pretty short arrow.




Bill

Bob, I talked to Paula at RRA before I started this thread, and she said the foot doesn't change the actual spine of the shaft. What I am wondering is if all that added weight (as much as 400+ grains) will act like a heavier point, which would require a heavier spined shaft over a non-footed on the same bow. Not sure about this, but before I get a set I want to find out.

Lol Bill--yep, you do have a mighty short arrow. Reckon Vic would know?

Chad

Long Bows Rule!

Chad,
Nobody has answered, so I'll take a stab at it. I believe the footing process stiffens the shaft at the front much as laminated wood is more resistant to bending. This in effect changes the bending modulus nodes to the rear of the arrow, thereby effectively shortening the working part of the shaft substantially, which in turn allows the same spine cedar shaft to be used, even though quite a bit of weight has been added to the front of the arrow. Make sense to you? Anyway, just my opinion, I could be wrong. Hope to see you at the Ky Klassic in April, I can hardly wait.

Best regards,
Darrel

Chad,

Is the footing wood always heavier than PO Cedar? If it is I can't see how it can't act as a heavy point. Can't understand how the process will stiffen the arrow. But I'm probably wrong, I'm the wrong kind of engineer (chemical). Does the footing process cause a weak or break point at the foot of the two woods?

CT,

From the few that I've made, out of doug fir with bubinga foot, I found that these arrows snapped in the middle as opposed to where the foot and shaft meet. My limited imagination concluded that this was a result of the nock trying to catch up with the tip, which had stopped rather suddenly. They broke in much the same way as would happen if you grabbed a shaft at each end and over flexed it. These were on self nock, ~32" shafts spined at 85-95# (at 28&quot

RC

Its not due to the foots Tuff its the bad arrow flight! I have done the same with cedar unfletched and have seen it happen with other woods, not always cedar, but always with bad arrow flight or a bad backstop or both.

Chad figure your FOC with these, then look at point weights. From what I figure I am in the same boat as broker to a certain degree.

Also another thing most dont realize, a considerable heavier shaft shot out of the same bow, of the same spine, is going to act STIFFER then a typical lighter cedar or sitka spruce......the difference betwen Static and Dynamic Spine.

I am working on some foots, acutally took some apart today from the pre 1940's era, foots with a little twist thrown in that if you didnt read the old books or take one apart, you'd may have possibly thought of it, but didnt realize it was long ago in use, or never thought of it at all which would be more then likely the case. I have to say these are the smoothest foots I have seen yet! The uniformity and roundness would make you think they were painted, not two seperate pieces. Not to mention appx 60+ years old, they are still straighter then most wood arrows that I have seen today, both made by big name arrow buisness's or shafts both purchased or made! the paint shows its age (and use to a certain degree) but one needent look hard to see the exactness in cresting from arrow to arrow.

Before I get to far ahead of myself I have a local cue buildier (fairly well known on the billiards scene) who is willing to take some time to show me the tricks of the billiard cue making trade which correlate greatly to the footing trade as far as construction! Now if I could just fine a 1k grain electric grain scale for a decent price.........oh and someone to pawn off 3 gallons of worthless gasket lacquer on, bless there sole, I'd be set! <img src=icon_smile_wink.gif border=0 align=middle>! The garage is set up just clustered with my strip canoe still in progress from last year taking a &quot;curing&quot; rest from summer hehe, and some of the maintence mans gear that needs to be moved. Go figure he'd bring in an industrial grade table saw, band saw, and ossiclating sander and put it right in front my my dang target! So many things to do, so little time! I'll keep ya posted but figure its going to be some time before I come to conclusions that I am sure are no different that things found 60 years ago!

Lil,

I suspect that the backstop had an effect on the breakage- snapped one when I CX'ed a piece of rebar, several others on various sized rocks. <img src=icon_smile_big.gif border=0 align=middle> The ones that hit only foam tend to remain in one piece.
They sure smack the target with authority tho!

RC

no doubt, those stinking rock grouse sure reek havoc on my arrows too <img src=icon_smile_wink.gif border=0 align=middle>