are EFOC arrows effectffected more by a crosswind???

[ozy clint]

got to thinking today that because the fletching on efoc arrows has a longer steering lever with which to do its job than with normal foc arrows, would a given crosswind have more of an effect on the efoc arrow?
given that the only variable change between arrows is the foc.

[3Under]

I believe they "tail waggle" more but they deflect less fom the "spot".

[O.L. Adcock]

3under got it right..The arrow that drifts the least, all else equal, is the one the corrects the fastest. Be it coming out of the bow, crossing wind shears, twigs, or small children. The higher the FOC is, the faster it will correct....O.L.

[KrEn]

In my experience (from limited target shooting w/ compound, but still), the arrow with the least drag will be affected less.

@ 70 and 90m my 5 1/2 feathered EFOC (325grs right up front) Gold Tips, drifts significantly more (more than double, maybe 3x), than the almost balanced ACCs with 1 1/2 QS vanes. The ACCs also hit well over 1m higher @70m...At 90m its like 2-3m. This is shot 240+ fps from an "arrow launching device" aka compound bow.

The wind drift of the tiny vaned ACCs are almost insignificant at our range, whereas the GTs w/big feathers will drift well out into low scores..
Woodies at normal FOC, still 5 1/2" feathers are even worse.

K

[Crash]

KrEN, you changed more than one variable on your arrows.  You changed fletching size and material.  The feathers have more drag and will cause them to drop at longer distances over a vane.  The drift can be attributed to the diameter of the shaft also.  The ACC being the smallest will drift less.  You can't overcome physics.  All else being equal, same fletching, same shaft diameter and same length, the arrow with the EFOC is said to drift less.

[O.L. Adcock]

KrEn, "In my experience (from limited target shooting w/ compound, but still), the arrow with the least drag will be affected less."

Absolutly....High FOC with all else equal will have less drag if disturbed and they all are!   ...O.L.

[Bush]

I was shooting in a 35 mph cross wind 2 weeks ago, I was shooting 2117's with 125 up front, and Carbon express with 245 up front, and carbon express with 125 up front.  THe point of the carbon express 245 drifted quite a bit less, but the fletch still drifted, so the arrow would hit a slight angle.  THe point and the shaft tended to drift the same amount on the other arrows, and hit straight, but the entire arrow moved much more.

[Orion]

Interesting observation Bush.  Were your feathers the same size, shape on all the shafts.  So what you're saying is that though the HFOC doesn't drift as much, the shaft itself doesn't stay as straight vis-a-vis the target, right?

[Bush]

Yeah...all were 4", 4 fletch.  Essentially, yes the center of mass of the arrow drifted much less, but the fletched end drifted more relative to the point on the higher FOC shafts than the average FOC shafts.  The average FOC shafts went into the target almost straight, but 6 inches left at 30 yards, and the higher FOC shafts impacted the target about 2 inches left on average, but the nock was quite a bit out of line of the direction of travel.

[KrEn]

you changed more than one variable on your arrows  

But im trained in multivariate analysis    

No seriously, im aware of that. But the woodies have similar FOC as the ACCs, and the GTs have similar size and fletch as the woodies.

Conclusion 1 = thin and small fletch (ACC) beats fat w/ big fletch (wood AND GT), no big surprise

Conclusion 2 = Fat and Normal FOC (wood) is NOT MUCH worse than thinner and EFOC(GT)

Conclusion 3 = Difference due to drag is FAR bigger than difference due to FOC, since ACC outshoots (by an incredible amount @70m)wood w/similar FOC (actually the ACCs are slightly less FOC than the woodies)

Since thin is low drift i would expect somewhat less drift from the GTs (comp. to woodies), which i observe. The difference is so small i am led to believe the difference is due to the skinnier shaft (since i now know they drift less from C1) and that the contribution from EFOC is slight to neglible, and if at all present is due to less drag from faster recovery from disturbance, as OL says.

K

[ozy clint]

bush- that the effect i thought would happen. drift less but impact with a greater angle, tail downwind of course

[O.L. Adcock]

Many of the top Olympic shooters are spending $120 or more a dozen for tungsten points to get their FOC's up for this very reason.

K, get those skinny shafts with the FOC up and you got something!    A percent or two isn't going to be noticeable, going from 12 to 20+ and it shines....O.L.

[KrEn]

K, get those skinny shafts with the FOC up and you got something!

I do believe you, increasing weight also lowers drift, from decreasing retardation and also from reduced drag due to lower speed - but then drift may increase to longer flight times... neverending story.
The recurve guys here actually shot fairly heavy skinny arrows outdoors, @ about 210fps from 45-50# 900cx limbs, indoors they all shoot 9mm arrows to maximise score.
There is also the trajectory thing, to heavy arrows and you get into sight adjustment range issues, having to move the peep etc..

Alas, i sold the compound, it gave me nothing over a rifle, so i spent the money on a Lilja .223 barrel...

K

[O.L. Adcock]

"but then drift may increase to longer flight times"

Just one of the pieces of the puzzle. No "may" about it, it will. I don't know what my 800 yards flight times are?    Juli and I really like our .233's, but she likes her .300 win mag better!   ....O.L.