Spinwings - whats does this mean??

[ASW1973]

Claudine Jennings is left handed recurve shooter and right handed compound shooter and a bit lazy so is often seen shooting left handed vanes on right handed bow and vice versa. makes no difference at all comound or recurve but best not to mix left and right handed vanes on the same arrow

[whiz]

Originally Posted by joetapley

If an arrow spins too fast it will start to spiral in flight (gyro effect). Some people have reported this occuring with Elite spinwings. The spin rate of an arrow overall increases during the flight. If the spin rate goes too high (at the longer distances if at all) the arrow will start corkscrewing.

By going up in fletching size you are increasing the drag torque on the arrow. This allows for a higher spin rate without the gyro effect becoming significant.

Hmmm. We have some interesting interpretations of physics here.

The spin rate of an arrow increases during the flight?
Interesting. So with the speed of the arrow falling off and the total energy of the arrow rapidly decreasing and the spin rate of the arrow overwhelmingly related to speed, where does this mysterious energy come from to increase the spin rate?

As for "drag torque", et al, you first need to understand the balances and interactions between tail volume coefficients, FOC, aerodynamic loads, stability margins and energy retained in the arrow before you can start pulling out some amazing blanket rule which covers all things.

Beware the folklore around any activity that has been around a long time.

[joetapley]

Originally Posted by whiz

Hmmm. We have some interesting interpretations of physics here.

The spin rate of an arrow increases during the flight?

Overall of course - aka force = mass x acceleration.

Some years ago George T. (gtek) published an interesting article on the Easton site based on the measured spin rate variation of arrows in flight with offset flat vanes (don't think it included spin wings). The interesting phenomenon was that the arrow RPM oscillated - it periodically decreased as (well as what you would expect) increased.

Don't have a copy (long gone) of the article so if anyone has one a copy would be appreciated - pretty please.

[John (OSF)]

I was looking at the results of something like that a couple of years ago Joe, Is that the one where the spin rate slowed down at 50 (might have distances wrong) and then started to increase again after that?
At that time I was interested in effect of vanes on flight/performance and how that might influence tuning and sight marks at different distances

I'll send you a copy if I can find it.

[Tank]

Ok numpty time, so be gentle... for a left handed person looking down the arrow the spin wing will curl to the left? or to the right? Probably a ridicolous question but just got to ask..

Also, i've read the notes on how to install them, socx marked wraps aside is there an easy way?

Putting them in place is a nightmare for me...so gave up, anyone got a quick definitive solution?

[joetapley]

Originally Posted by John (OSF)

I was looking at the results of something like that a couple of years ago Joe, Is that the one where the spin rate slowed down at 50 (might have distances wrong) and then started to increase again after that?
At that time I was interested in effect of vanes on flight/performance and how that might influence tuning and sight marks at different distances

I'll send you a copy if I can find it.

That's the one - muchas gratias if you have it. If my memory is correct (ha ha) the overall RPM showed a number of dips on the overall upward trend.

[joetapley]

Originally Posted by Tank

Ok numpty time, so be gentle... for a left handed person looking down the arrow the spin wing will curl to the left? or to the right? Probably a ridicolous question but just got to ask..

Also, i've read the notes on how to install them, socx marked wraps aside is there an easy way?

Putting them in place is a nightmare for me...so gave up, anyone got a quick definitive solution?

Looking down the arrow think of the spin wing shape as an arrow > . the shaft will rotate in the direction the arrow points.

The beiter wing vane makes fitting and aligning the arrows a doddle. Effectively its a spin wing fletching jig.

[Tank]

Originally Posted by joetapley

Looking down the arrow think of the spin wing shape as an arrow > . the shaft will rotate in the direction the arrow points.

The beiter wing vane makes fitting and aligning the arrows a doddle. Effectively its a spin wing fletching jig.

Sorry, does that mean for a lefty, the vane will curl towards the riser or away?

Does the beiter wing vane mean you have to have beither nocks to use it properly?

[joetapley]

Originally Posted by Tank

Sorry, does that mean for a lefty, the vane will curl towards the riser or away?

Does the beiter wing vane mean you have to have beither nocks to use it properly?

The top vane points towards the bow RH = > LH = <

vane holder holds and aligns the vane to the shaft - doesn't connect to the nock (there is the tri-liner for this if you want) See

http://wernerbeiter.com/en/products/...WingHolder.php

[Tank]

thanks thats, perfect.