Testing another tuning thought

[enewman]

Ok let me start by saying just starting. Need to do several more bows. But this is what I did so far

Started thinking about my last 3 post on draw length and spine, and what I believe the arrow is doing on the shot. Then I started thinking about nock travel, and how do we know we have have it. Now this test was on a dual cam bow.

So if what I think should happen with arrow and how it follows the draw curve, I took a 200 spine arrow at 28 inch long. Bare shaft with a 125 gn tip. This arrow is very stiff. I set bow up. Set at 63 lbs. sync cams. Set center shot.

I set up hooter shooter so when bare shaft leaves bow it's only 3 ft from paper. I had a low tear. Now since arrow cannot flex. Or very minimum. Is this tear a stiff tear or a nock problem.

So looking at this. What cause a nock problem is cams are in sync. I thought. Well maybe since it's a low tear. Top limb is weak. So I added a half turn (tiller).

Got almost a bullet hole. Slight high. So now I backed up to 8 yards. Yep now high tear. Took some out on top limb. Now back to hole.

At this point. I would say bow has level noc travel. Should not have to move loop again or limb bolts.

Took my arrow and shoot with a tear. Started adjusting arrow only.

I have yet to touch the bow once I started shooting the 300 spine. I know I have slight rest adjustments to do. But here are the results so far

I can't get pics to load.

Arrow I'm shooting after setting bow is 300 spine 24 3/8 with 290 total weight up front.

First group beside each other second group about 2.5 inches left slight high. Third group about 1 inch left and slight low

Again after seting bow for no nock travel using a 200 spine. All I've done so far is adjust the 300 spine arrows. All three shoots at 20 yards. And it s flying very straight.

[enewman]

I'm doing this testing because I feel once bow is set up and get no knoc travel with the stiff arrow. You should only have to fix your main arrow with minimum adjustments to bow.

I will also test a single cam bow. Since these are none to have bad nock travel.

[Hholland]

Anyone with a Hoyt that is tuned by advancing or retarding the top cam, and you are willing to do this same test, would be nice to see the results to add to the data.

[Prodigy15]

What Bow are you using?

[enewman]

What Bow are you using?

First test my apa. Second test was my mr5 same results. Third test was a carbon knight. That thing has horrible nock travel. Will have to play with that one again

D350 is next

All these test are from my hooter shooter.

[muddyfuzzy]

Anyone with a Hoyt that is tuned by advancing or retarding the top cam, and you are willing to do this same test, would be nice to see the results to add to the data.

you can actually effect vertical nock travel by doing this not only on a hybrid system but also singles and duals as well. it is the equivalent of yoke tuning only in a different axis. we really start to split hairs here but if you are trying to get everything out of the bow including exceptional arrow flight it is the way to go.

[enewman]

you can actually effect vertical nock travel by doing this not only on a hybrid system but also singles and duals as well. it is the equivalent of yoke tuning only in a different axis. we really start to split hairs here but if you are trying to get everything out of the bow including exceptional arrow flight it is the way to go.

So,far all test looking good except the carbon knight. Bad knoc travel.

So now what I'm seeing. Why are people moving rest and loops and cam sync. When all you need to do on most bows is set vertical nock travel with limbs with a very stiff arrow. Then take your normal,arrow and just trim till it's a hole. This way keeps bow with cam sync and level arrow to,string. And arrow is at optimum spine.

[Prodigy15]

You wanna use my Prodigy?

[enewman]

You wanna use my Prodigy?

We may just have to meet up after I do some more testing.

[Hholland]

I have a question for muddy fuzzy, where do u think the optimal place for the front node is, and what happens if you get the front node behind the rest? Anyone that know can answer, was just wanting to pick muddys brain too.

[muddyfuzzy]

Preferably I would think you would want it in front of the rest, if behind i could see it causing some misreading and tuning issues.