Trad Gang

Hear me out.  I shot CX Heritage 250's 29 inches long with 265gr up front for a total of around 620gr.  I just made my first poplar arrows 11/32 29" long with 165gr up front for a total of 650 ish gr.  Same feather, same fletcher and same helical.  Does the more evenly distributed weight make them spin faster.  I never noticed it before but I can see them now.  It is very obvious.  
Just a thought, maybe I'm crazy.  Maybe I'm paying attention more.

The bigger diameter gives you more to see.

if they are a little bigger diamater, the feathers would be moving faster even if they are spinning the same RPM. Just like a looking at  a bicycle wheel spinning the farther out the circle it is the faster it's moving at the same RPM.

If by "same feather" you also mean same color...
I'd say you just never noticed it before.

Your poplar are a bit heavier, so they might be going a tad slower...might be enough to give you more time to see the arrow spin?

All the reasons make perfect sense.  I think I am just paying better attention to it.

QuoteOriginally posted by old_goat2:
if they are a little bigger diamater, the feathers would be moving faster even if they are spinning the same RPM. Just like a looking at  a bicycle wheel spinning the farther out the circle it is the faster it's moving at the same RPM.

I think you have that backwards.     :thumbsup:

QuoteOriginally posted by eminart:
 

QuoteOriginally posted by old_goat2:
if they are a little bigger diamater, the feathers would be moving faster even if they are spinning the same RPM. Just like a looking at  a bicycle wheel spinning the farther out the circle it is the faster it's moving at the same RPM.

I think you have that backwards.      :thumbsup:  [/b]

No, I have that one right, same reason if you put bigger diamater tires on your car than what it's designed for, you will be moving faster than what your speedometer says.

With all due respect I too believe you have it backwards. the reason your speedometer reads low is because at one revolution of the axle (think shaft)the larger diameter tire goes further. Think if you were watching from the side and the same axle (shaft) had a tire 2 feet in diameter and then you watched a complete revolution with the tire 10 feet in diameter, the outer edge of the tire would be mutch easier to see.

QuoteOriginally posted by Jim Wright:
With all due respect I too believe you have it backwards. the reason your speedometer reads low is because at one revolution of the axle (think shaft)the larger diameter tire goes further. Think if you were watching from the side and the same axle (shaft) had a tire 2 feet in diameter and then you watched a complete revolution with the tire 10 feet in diameter, the outer edge of the tire would be mutch easier to see.

Yes that's what I'm saying, the bigger the diameter the faster it has to move in the outer circumference to make one revolution in the same amount of time as the smaller diameter arrow. I've been told I speak a different English than everybody else, you are supposed to know what I meant. :)

I had hoped that the emphasis of what I posted was the "easier to see" part. Though I shoot parabolics on everything the majority of wood shafts are 11/32" and have high cut shield fletching on them, they are easier to see and appear to spin faster.

Old goat is right, except it doesn't matter in this scenario.  Since the feathers causing the rotation are attached to the outer "skin" of the arrow, the arrow will spin at the same rate.  

UNLESS...

Maybe you have more helical because you are working with a fatter shaft in your fletching jig?  More surface area, more twist?  Just a thought.

I see the difference in rotation all the time with different sets of wood arrow (that's all I use). Arrows that spin like a tip I believe are more "in tune" with my bows. Some, that you can almost count the number of rotations to the target, aren't quite "in tune" with the bow. In other words, a bow will like one set of arrows better than others. That's my story anyhow.....Art

Yup, he's got it right. Same angular velocity (degrees / second) but the bigger the diameter, the faster the linear velocity. (ft / second) The feathers on a larger diameter shaft are traveling a further distance in one revolution.

Also, assuming all things are equivilent as far as starightness of the arrow, and the distributed weight / total weight of the arrow, a larger diameter shaft will have more rotational torque applied to it in comparison with a more skinny shaft. (also assuming the fletchings are identical in every way between the two arrows)

You can see your arrows in flight? I will havta' slow mine down  :laughing:    :laughing:

quote:

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Originally posted by Bjorn:
You can see your arrows in flight? I will havta' slow mine down   :biglaugh:    :biglaugh:    

I'm with Jeff, too. More helical means you're viewing more feather surface. (and yup, slower arrows) I did some extreme helicals last spring and they were really easy to see.