Flight tuning

[bowhunter44]

I have a question (which typically turns into several questions) about flight tuning. The question being - where, in terms of distances, would/should a bow (Black Ice, Vectrix) be on with the first pin to know that the nock point was correct?

I saw a quote from a thread a while back that goes something like this:

"#2: start your horizontal flight tuning at 5 yrds. and work back 5 at a time until you hit 15 yards.
#3: Set the first pin to hit spot on @ 15yrds.
#4: go back to 20yards and shoot horizontal."

Would I take the above to mean that if the twenty yard pin is on at 15 and 20 yards that all is well? How does one determine if the nock point is correct/incorrect vs. the top or bottom limb is out of tune?

Thanks!

[BT]

May 12, 2008 6:50:09 GMT -5 bowhunter44 said:

I saw a quote from a thread a while back that goes something like this:

"#2: start your horizontal flight tuning at 5 yrds. and work back 5 at a time until you hit 15 yards.
#3: Set the first pin to hit spot on @ 15yrds.
#4: go back to 20yards and shoot horizontal."

Would I take the above to mean that if the twenty yard pin is on at 15 and 20 yards that all is well? How does one determine if the nock point is correct/incorrect vs. the top or bottom limb is out of tune?

Thanks!

If the tiller or timing is out , you will find this when you finish with the broadhead.
Timing would have to be out massively to find it with a field point although you can find it by shooting throughout the power curve.
Shooting through the curve to find timing issues is to difficult to explain on a forum so I don't bother.
A broadhead (passing head) will show anything that exists

Any modern bow will shoot 20 yards flat so the assumption is that if you have same point of impact at 5 and 15 then you are tuned for flat flight through the cycle.
As I said...the broadhead is the final determination factor to fine tune the flight.

To adjust the nock point,rule of thumb is to measure the thickness of the arrow from end nock point to opposite side height of the arrow shaft.
I suggest laying the arrow on the table then measuring from the top of the shaft to the bottom of the nock end point as viewed from the underside.
Put a T square on the string/rest and set the bottom of the nock at the point above level which corresponds to the arrow Heath previously measured.
For carbon,this is generally 3/16" (exempting slim line shafts)



For level nock travel this would be the end point.
However....almost no bow exhibits zero nock travel (regardless of what manufacturers claims are) so this is why you have to flight tune and may adjust the nock up or down up to 1/16" from the start point.
If your nock point exceeds 1/8" above/below the start point while tuning , you are out of time somewhere.
More than likely it is not a tiller issue and is a timing issue.
Manufactures have exceeded past riser specs and rarely ever have tiller issues.
However....if you are turning out the limbs....you are now responsible for tiller and you should always check that first

[bowhunter44]

WOW! Thanks BT! As typical, your response is articulate and knowledgable. Thanks for sharing!!!

[BT]

I did forget to mention the finish.
(I had to run out)

When you have the vertical and horizontal on , attach a broadhead and shoot at 20 yards.
If the broadhead does not hit the same area, don't freak out!
Adjust the rest to move the broadhead to the same point of impact as the field point.
Trust me that this will not effect your sight pin adjustment.


Again...use a broadhead which has passed the flight tests here....there are many to choose from.
A flawed head will only complicate the final process.

[bowhunter44]

I should be good with 'passing' heads to use in final adjustment. Since becoming a member of this site I have acquired some Blitz, Stinger, RazorShark, Phantom, and Ti-100 broadheads for testing purposes! Although I haven't seen testing done on the Ti-100's (which I would love to see), they seem to be one of the better, in terms of flight characteristics, of my current inventory.

[BT]

May 13, 2008 6:56:18 GMT -5 bowhunter44 said:

Although I haven't seen testing done on the Ti-100's (which I would love to see).

Give me a retailers link

[bowhunter44]

Yes indeed! It has gotten to the point that when I log on, shares in Bowhunters Superstore, Collins Outdoors and the like go up a quarter of a point!

[BT]

I have bookmarked it and will get to it.
Good value head for sure

[bowhunter44]

Actually, I don't have a single retailers link. Typically I can find heads the cheapest on e-bay. Collins Outdoors has good prices on shafts. Bow Hunters Supply Store has 99 cent shipping on all products, Eders and Mountain Archery get the nod every now and then.... The list goes on and on. Not long ago I referenced getting 'the look' from my wife about spending more money on archery stuff. Although she is a patient gal, I have been known to try the patience of Job!