How I solved my Erratic Arrow Flight

[Ssamac]

I'm shooting Easton XX75  2117 alum shafts from my Bear Kodiak'56 54#. I draw 27 and my shafts are about 27.5, 100gr points, 3 feathers left wing parabolic. Nocks just right, not too tight..

Arrows porpoise and fishtail at 20-25 feet and still get to the target. But what a weird flight.
My 50-55 spined wooden shafts same feathers, 25gr tip are much more stable and fly nice although they do tend to the left. They are also 27.5 long.

What causes such a wierd arrow flight, and what recommendations do you have for a nice wood arrow for this bow?

BTW, not really missing with it, just not all bullseyes and a really strange flight for the aluminums.

Thanks
sam

Thanks

sam

[Chuck Hoopes]

Sounds like your woods are about right-- you could be doing something that causes them to go left-- i.e. the way you grip bow.-- More likely they are a bit stiff - this will cause shots to the left. Cedars spined 45-50 are probably a better choice for you.  You could go to FF string, if your tips are reinforced, if not you can just wrap the loops w/ waxed dental floss.  Anyway, FF ususally requires a bit more spine, so the woodies you already have would likely work well w/ this set up.  Iam a big believer in large feathers-- I shoot 5 1/2" bananna cuts, exculusively.

[GRINCH]

1st arrows are under spined for your bow,as far as shooting left,you are probably torking the string,try a ligher release and see what happens.

[Smallwood]

those 2117s are waaay too stiff, you need something along the lines of a 2016 or a 1916.
the porpoise in the arrow flight is a nock height problem, you can start with an intentionally too high nock point at 5/8" and move it down an 1/8" at a time to find the right nock point setting. Then work on your spine issue. I don't even think you could get the 2117s weak enough for your bow with a 250 grn point, but you might try.

[Ssamac]

Understood and thanks. My wooden arrows are good, just "tend" left which could be me. As for realease, I shoot the same with all the arrows, so not sure where that goes.

The 2117 shot ok from a 45# Wing and a 45# Quinn, and a short 45# Red Wing Hunter. Shot the best with the Quinn, however. So you would think would be ok with a 54# Bear except the Quinn was center shot and the other two close to center shot. Is the problem really the narrow double shelf on the '56 Bear and not really the weight?

Thanks
Sam

[SpikeMaster]

Those arrows are to stiff for any of the 45# bows you have, they just didn't show as bad as arrow flight out of those bows because of being cut closer to center. Like Smallwood said, 1916 or 2016 would be best.

[Ssamac]

How do you translate a 1916 to a wooden shaft then? Also, should I get a 5/16 woodie or an 11/32 woodie? What do you guys think.

BTW< I am using 3x 5 1/2 inch parabolic feather, left wing, helical.

[aromakr]

Ssamac:

2117's spine around 68#@28" on a double shelf Bear your way over spined. For woodies at 27.5" I would get spines of 45/49 in either 5/16" or 11/32" with 100 to 125 grain points. Either size shaft will work equally well, however the smaller dia wood will be denser in the same spine as the larger dia.
Bob

[Old York]

Ssamac -

a 1916 spines out at 50.6 pounds,

and a 2117 spines out at 77.4 pounds.

That's using Easton's deflections and the

0.825 conversion factor.

[crandog]

Try a 2018.

[Ssamac]

Seems like a 1916 is the ticket if it translates to 50.6 pounds which at my draw is just about right
Or woodies at 45-49. I'll give it a try and report back.

Thanks guys
sam

[Ssamac]

TTT  ^^^^^ please

[Ssamac]

Ok I have to thank a lot of people and also report on the results. I got a dozen 11/32 wood shafts spined 45-50 which is supposed to be the equivalent of a 1916 aluminum. Cut them down to 28 1/2 and put 125g points on . Then out to the target with my 56 Kodiak. (54#)
The arrows shot beautiful, just a perfect flight, fast, and right on the mark. No more fishtail and porpoise at the same time. Appreciate all the right on help.

Sam

[East Coast archer]

I guess Aromakr knows what he's talking about!!!  

[tcw]

newbie here - do 2117's at 30" length sound about right for a (Ben Pearson) recurve with: 55#, 66" length, 28" draw?

I feel like my arrows dance around alot too.  It could be another issue though, as I am still learning how to shoot straight.