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dugout
03-14-2012, 12:16 PM
I am setting up a 2010 Bengal and have questions. I balanced the tiller, set up the DW to match arrow spine and set the cam stop. Base line rest centered shaft on Berger holes and 1/4" knock high. All good.
I paper tune and getting initial vane low tears. I raise the knock loop till I have bullet holes. R&L are fine.
First question, The knock point is REALLY high, like an inch high. Is this normal with this bow?
I have a good clean launch but it's obvious it is at a low angle from the bow. I barely have any adjustment left in my sight, Sword Apex, even after flipping the bracket to the low side? Peep is at normal height, too. Normal?
Are folks setting these bows up with even tiller measurements?
I'm tempted to re-set the tiller week/long on top and stronger/shorter on the bottom to get a more centered knock position result in paper tuning and a more perpendicular to the riser launch, helping the sight out.
Any input is appreciated...

Thanks

SJunior
03-14-2012, 01:54 PM
What rest are you using?

Spiker
03-14-2012, 02:29 PM
I would bottom out both limb bolts and then back them off evenly to the draw weight you want.
Ignore the tiller measurements for the moment. - (Are you measuring to the string or to a string from axle to axle?)
Then - if you are using a release, set the nock point square.
If your finger shooting - set it 1/4" high.

See what that does for a starting point.

dugout
03-14-2012, 02:58 PM
What rest are you using?QAD Ultra-Rest LD

bfisher
03-14-2012, 04:38 PM
What draw weight is the bow and draw length. Also we need the total details of the arrow; brand, model, spine, length, point weight, fletching type.

dugout
03-14-2012, 04:40 PM
I would bottom out both limb bolts and then back them off evenly to the draw weight you want.
Ignore the tiller measurements for the moment. - (Are you measuring to the string or to a string from axle to axle?)
Then - if you are using a release, set the nock point square.
If your finger shooting - set it 1/4" high.

See what that does for a starting point.
Tiller, I am measuring to a flat edge on the axles even though the string is very close to plumb and probably could be used on this bow with the Acu-Trak Cams. The manual says to measure to the string, as well.
I will certainly start over in one form or another. I'm in no rush; just puzzled... :)

dugout
03-14-2012, 04:57 PM
What draw weight is the bow and draw length. Also we need the total details of the arrow; brand, model, spine, length, point weight, fletching type.

Bow 2010 Bengal, 45#-60#, Limbs "3HP 10131"
Max DW is 63# on my scale.

DW: 60#
DL:28"
BH:7"
ATA: 32.25"
D-Loop: 8g
Peep: 8g

Arrow
Shaft: GT Hunter XT 5575 28"
Nock: QAD 4.6g
Insert: GT Accu-lite 11.6g
Points Saunders Combo 99.5g
Vanes: Blazers 6g ea.
Weight: 365g

Chrono: 261g
This is everything, I guess.

bfisher
03-15-2012, 05:12 AM
Bow 2010 Bengal, 45#-60#, Limbs "3HP 10131"
Max DW is 63# on my scale.

DW: 60#
DL:28"
BH:7"
ATA: 32.25"
D-Loop: 8g
Peep: 8g

Arrow
Shaft: GT Hunter XT 5575 28"
Nock: QAD 4.6g
Insert: GT Accu-lite 11.6g
Points Saunders Combo 99.5g
Vanes: Blazers 6g ea.
Weight: 365g

Chrono: 261g
This is everything, I guess.

Now that's the kind of info that can be really helpful. From this I'd say the arrow spine is close enough. It's certainly not underspined. I'd suggest the same thing as Spiker for now. Start over. Bottom the limb bolts and back them off evenly to your desired draw weight. Probably about one turn each in this case. Don't worry about measuring tiller. Then set your loop so the arrow is perpendicular to the string (square) or no more than 1/8" high. Now try bare shaft or paper tuning from about 4-6'. Let us know what you get.

dugout
03-15-2012, 09:22 AM
I may have not mentioned it but I really like the bow. It is my first parallel limb bow and the shortest ATA bow I have ever shot. stability is a little wanky but for a hunting bow the pluses far out weigh the minuses.
Well I started over and set everything up again basically one turn off the bottom on the limb bolts. As you can see in the first picture, (I hope:confused:), I got the same low tear.

6008

I decided at this time to mess with the Tiller. After making some changes the tear improved but not much.
6009

I raised the nock point till it tuned The three bullet holes were shot at 12ft, 6ft, and 3ft.

6010

I went back and set my 20yrd pin. I'm done.
6011

This is the angle of the final set up. At some point I may swap the top and bottom limbs just to satisfy my curiosity.

6012

SJunior
03-15-2012, 10:58 AM
From the last pic it looks like your launcher arm isn't at a 90 degree angle, could be part of it. Also which launcher arm is on it? QAD sends 2 different arms with a new rest.

dugout
03-15-2012, 11:18 AM
It's the shorter of the two arms, or the standard arm. The rest is mounted is in line with the Berger holes as specified for both the LD and the HDX I have. I was holding the arm in the full draw position as the at rest position is a little lower and the yoke cable pulls it up into the full draw position. Yes it is shy of vertical but this would only affect clearance issues which I don't have. Past vertical or leaning back would be very bad juju as this would raise the arrow on release instead of a pure drop and all kinds of nasty stuff can happen. Very bad juju! The more vertical arm would only raise the nock proportionally with the rest, right?