rifled arrow shafts
#11
Typical Buck
Join Date: Feb 2003
Location: Fort Wayne Indiana USA
Posts: 574
RE: rifled arrow shafts
Think of the physics required to impart spin into an arrow.
The closer to the centerline of the shaft you attempt to generate rotation, the more energy is required to accomplish the rotation. It is more like a lever, the longer the lever given the same fulcrum to load ratio, the longer lever is able to place much more energy into the load.
The more offset or helical placement of your feathers or vanes, the greater leverage effect on the arrow shaft. Since the vanes are at the greatest distance from the center of the arrow shaft, they have the most to offer in the form of rotational energy. The increased suface area of the vanes(feathers) cannot be duplicated (force vs force)by any other arrowcomponent and therefore they are the most effective in producing arrow spin. This is because the fletching is in constant contact with air. This interaction is what produces the energy that we are talking about. It occurs the entire time an arrow is in flight.
Alas, the QuickSpins. They use this same principle of physics, but I have never used them. Ican control myshafts with helical or extreme offset fletching w/a drop away rest. No clearance issues and without the added weight of theNAP vanes.
And yes, all concessions have concequences. More spin = less speed. But what are we trying to achieve here, better accuracy at a slightly slower fps or just acceptable accuracy at blazing speeds?
The closer to the centerline of the shaft you attempt to generate rotation, the more energy is required to accomplish the rotation. It is more like a lever, the longer the lever given the same fulcrum to load ratio, the longer lever is able to place much more energy into the load.
The more offset or helical placement of your feathers or vanes, the greater leverage effect on the arrow shaft. Since the vanes are at the greatest distance from the center of the arrow shaft, they have the most to offer in the form of rotational energy. The increased suface area of the vanes(feathers) cannot be duplicated (force vs force)by any other arrowcomponent and therefore they are the most effective in producing arrow spin. This is because the fletching is in constant contact with air. This interaction is what produces the energy that we are talking about. It occurs the entire time an arrow is in flight.
Alas, the QuickSpins. They use this same principle of physics, but I have never used them. Ican control myshafts with helical or extreme offset fletching w/a drop away rest. No clearance issues and without the added weight of theNAP vanes.
And yes, all concessions have concequences. More spin = less speed. But what are we trying to achieve here, better accuracy at a slightly slower fps or just acceptable accuracy at blazing speeds?
#12
Giant Nontypical
Join Date: Dec 2006
Location: Heaven is my home, temporarily residing in WNY :)
Posts: 6,679
RE: rifled arrow shafts
ORIGINAL: lifesadrag
Maybe this has been brought up before, has anyone thought of how a spinning arrow effects broadhead penetration?
Maybe this has been brought up before, has anyone thought of how a spinning arrow effects broadhead penetration?
Any takers???
#13
Giant Nontypical
Join Date: Dec 2004
Location: Ohio
Posts: 7,876
RE: rifled arrow shafts
Interesting! They already incorporate the concept in broadheads. The Thunderhead isn't rifled, but has groves that are supposed to keep it going straighter, farther. I do believe it works. Could do the same on some shafts and see. I bet they already have. I like mine polished so I doubt I'd be a customer if they did.
#14
Join Date: Feb 2003
Location: Blissfield MI USA
Posts: 5,293
RE: rifled arrow shafts
You don't need "rifled" arrows, that is what the fletchings do. Besides the concept with bullets has the barrel rifled, not the bullets.
Even a slight offset on your fletchings will provide enough spin to stabilize an arrow.
Paul
Even a slight offset on your fletchings will provide enough spin to stabilize an arrow.
Paul
#18
RE: rifled arrow shafts
ORIGINAL: PreacherTony
Ed, that is a good question....at least to me [8D]
Any takers???
ORIGINAL: lifesadrag
Maybe this has been brought up before, has anyone thought of how a spinning arrow effects broadhead penetration?
Maybe this has been brought up before, has anyone thought of how a spinning arrow effects broadhead penetration?
Any takers???
Im gonna test the new nocks as soon as the weather gets better... I'll be sure to post results.
#19
Fork Horn
Join Date: Aug 2005
Location: Milwaukee WI
Posts: 264
RE: rifled arrow shafts
I dont think rifleing the arrow would do anything because a bullet isnt rifled but the barrel is to make the bullet spin. Now if your shooting the arrow out a barrel you might be on to something but I think that would make things a little more interesting to say the least.
#20
Join Date: Aug 2006
Posts: 22
RE: rifled arrow shafts
The same idea of an arrow spinning to stabilize a broadhead is similar to a baseball and pitching. A two seam fastball is spinning the fastest and getting the least air resistance because is it spinning against the least stitches so it goes the straightest and fastest. When I throw a knuckleball, I want the least rotation on the ball so the wind and air hits the ball and affects it so make it dance all over the place. If our arrows are dancing, consistency will suffer greatly and hitting anything with a broadhead would be impossible.