arrow flight question

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B.Hill
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arrow flight question

#1 Post by B.Hill » Sun Mar 10, 2019 3:04 pm

Hi Guys just a quick question, shooting some new arrows today, I used the 3rivers archery calculator and seem to be pretty good as far as spine goes, but have noticed that they seem to be porpoising in flight but are hitting the target fairly square, I am guessing its knock height and was wondering what most people set their nock at the start.

I can live with the flight problems if the arrow is hitting where im aiming but if it is a simple fix why not have it perfect, I am fairly new to arrow tunning, iv just shot what ever arrows I had, but thought I would see how it goes with these arrows and see if there is any huge difference.


Cheers Bodie

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Stickbow Hunter
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Re: arrow flight question

#2 Post by Stickbow Hunter » Sun Mar 10, 2019 3:58 pm

G'day Bodie, The standard if you like is ⅜" above right angles to the shelf. This is if you shot Mediterranean release (split fingers). If you shoot three under someone else will have to step in and help with the measurement. Really it is just a matter of trying different heights by adjusting a little at a time until you have good flight.

Jeff

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Kendaric
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Re: arrow flight question

#3 Post by Kendaric » Sun Mar 10, 2019 5:14 pm

I have often found that if shooting 3 fingers under, then 1-2mm lower than that of mediterranean - but I have also heard other say the opposite. Much depends on how the bow is tillered too. I have one recurve here than doesn't seem to mind eitherway, or even if I string walk a little (experimenting). As stated before, it is just a matter of trying different heights by adjusting a little at a time until you have good flight.

If you still have a problem after doing this - try shooting cock fletch in (there may be a problem with grain alignment, though I am sure I have seen some 3 Rivers arrows that were not grain aligned) if shooting off a shelf. I know it seems opposite to what you may be use too, and it looks weird, but I have found that to work an absolute treat.

B.Hill
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Re: arrow flight question

#4 Post by B.Hill » Sun Mar 10, 2019 6:37 pm

Hi Guys
So shot a few more arrows this afternoon and tried with the nock on top of the brass nocking point, BINGO worked a treat great flight or as good as I can probably get with my form, but good enough for me.

thanks for the help
Bodie

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Kendaric
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Re: arrow flight question

#5 Post by Kendaric » Mon Apr 01, 2019 5:20 pm

B.Hill wrote:
Sun Mar 10, 2019 6:37 pm
Hi Guys
So shot a few more arrows this afternoon and tried with the nock on top of the brass nocking point, BINGO worked a treat great flight or as good as I can probably get with my form, but good enough for me.

thanks for the help
Bodie
Sounds good start with, but in my mind it raised a few questions.

If above the the current nocking point -a couple of things to consider:

1. The current nocking point was way to low to begin with.
2. The tiller of of the bow is way out, assuming point one in correct.
3. The arrow is lauching off the shelf rest at this higher nocking piont, giving better clearance, but not necessarily better tune.

Having said that, it is better to have a nocking point that is too high, than that which is too low.

One thing I have noticed with shooting off the shelf, that 'cock fletch out' can bump the shelf during the archers paradox, causing propoising - even with correctly spined arrows. Only those on the soft side will tend to clear more.

My go to alignment is cock fletch in, for shelf shot bows.

Yes I know this looks weird, and goes against the norm, but I guarantee that you will get better clearance off a shelf bow, when shot this way. Cock fletch out is more for raised arrowrests, often with pressure buttons.

Trust me - I know a doctor lol.

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greybeard
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Re: arrow flight question

#6 Post by greybeard » Tue Apr 02, 2019 4:46 pm

An old method to see how the arrow passed over the shelf was to sprinkle talcum powder on the feathers. Tell tale traces of powder would be left in the shelf area and you could see where the feathers were making contact.

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