arrow clearance issues

[Munsterman]

Hi,

I seem to have developed an arrow clearance problem. The fletchings are definitely impacting the riser and leaving a gummy smudge. I am a bit confused as the smudge is sometimes on the back surface of the riser and sometimes on the vertical plate of the arrow rest.

I am shooting 40 lb Hoyt G3 limbs, 30 inch Navigator 540 arrows with 110 grain piles. The limbs appear to be wound in full according to one of our senior club members. The rest is a flipper type rest, where the tension of the flipper if coarsely adjusted by bending the prong arms apart/together. I cannot use one of the more faancy rests as my rider has only one hole drilled in it, and it is occupied by the pressure button. Judging by the impact angle and grouping at the target face, the arrows appear to fly straight at distances from 20yds to 100yds.

can you offer any advice on curing this problem. Will the rest flipper tension play much of a part? It was set quite weak.

C

[tel]

am I missing something?

the arrows appear to fly straight at distances from 20yds to 100yds.

the problem is?

[Munsterman]

the problem is?

The problem is that the fletchings are impacting the bow, and I would like to correct this. I agree that as he arrows seem to travel straight, this is not a massively serious problem but if I can correct it, then perhaps my groupings will be tighter. Mentally, I am always conscious that the fletchings rub the riser and may cause some deflection. By the way, the fletchings are the smallest available on a nav.

thanks,

C

[Munsterman]

Originally Posted by tel

am I missing something?
the problem is?

I would like to improve the grouping, and I am convinced that clean shooting will help, hence the hope of getting away from the fletchings impacting the rest

C

[Tarkwin]

is this on every loose?

are your limbs straight ...or aligned correctly - does the string run down the centre of the bow

if you look along a nocked arrow, is the point outside the string by approx the diameter of the shaft?

T.

[Shirt]

Play with the brace height and see what happens.

Also, are they 40 lb marked limbs, or 40 lb at your draw length? If it's 40 marked, unless you're using an extended clicker that mounts on your sight, a 30" Nav 540 sounds extremely weak to me. That could well be causing the problem...

[Tuck]

Originally Posted by GingerGeneCarrier

Hi,

I seem to have developed an arrow clearance problem. The fletchings are definitely impacting the riser and leaving a gummy smudge. I am a bit confused as the smudge is sometimes on the back surface of the riser and sometimes on the vertical plate of the arrow rest.

I am shooting 40 lb Hoyt G3 limbs, 30 inch Navigator 540 arrows with 110 grain piles. The limbs appear to be wound in full according to one of our senior club members. The rest is a flipper type rest, where the tension of the flipper if coarsely adjusted by bending the prong arms apart/together. I cannot use one of the more faancy rests as my rider has only one hole drilled in it, and it is occupied by the pressure button. Judging by the impact angle and grouping at the target face, the arrows appear to fly straight at distances from 20yds to 100yds.

can you offer any advice on curing this problem. Will the rest flipper tension play much of a part? It was set quite weak.
C

For your setup

40# limbs @28"

limbs wound right in ADD 2-3#
30" Arrows ADD 4 #

So without weighing you are probably at 46+# on your fingers

giving a spine of 480 for Navigators

Plus you have a heavy pile which will weaken the dynamic spine so you might need 430's

You must weigh the limbs at your draw length and try some stiffer arrows to see which can be tuned.

EDIT: go to the easton archery website for a downloadable arrow spine program!

Dave

[Munsterman]

Originally Posted by Tuck

For your setup

40# limbs @28"

limbs wound right in ADD 2-3#
30" Arrows ADD 4 #

So without weighing you are probably at 46+# on your fingers

giving a spine of 480 for Navigators

Plus you have a heavy pile which will weaken the dynamic spine so you might need 430's

You must weigh the limbs at your draw length and try some stiffer arrows to see which can be tuned.

EDIT: go to the easton archery website for a downloadable arrow spine program!

Dave

Lots of great advice and stuff to think about. Thank you.

The limbs are straight. The nocked arrow is aligned as it should be. The limbs are marked up at 40lbs. A crude weighing earlier today with the club bow scales showed 45 pounds on the fingers. I do not use an extended clicker so 30 inches is to the front face of the bow (side where log rod attachment is present). Fletchings are rubbing on the opposite side (between the button and the nocking point - belly of the bow??).

I have downloaded the Easton arrow selection program and at 45 pounds it sees the Nav 540 are ok, but if I go to 46 lb then the spine changes.

C

[Shirt]

Erm, ignore the Easton thing. At around 45-47# at full draw, and a 30" arrow, I'm shooting ACE 470s (stiffer than yours) with 100 grain points (lighter than yours) and they're coming out fairly weak. I really think you need stiffer arrows to cure your clearance problem.

[Chase Archer]

Having just checked the Easton charts I have to agree with Shirt, 430s look like the most likely choice for your setup. 480s are ok too but they don't give you the flexibility of changing the point weights. Therefore 520s are far too weak and the most likely cause of your problems.