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Author Topic: Bare shaft tuning?  (Read 3569 times)

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Offline Mafort

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Bare shaft tuning?
« on: December 21, 2018, 10:38:48 am »
I think that’s what it’s called. Is it exactly as it sounds? Is there any other way to make sure the arrows fly straight? Best advice for points and fletching style? Ahhh
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Offline Pat B

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Re: Bare shaft tuning?
« Reply #1 on: December 21, 2018, 10:50:35 am »
Knowing the correct spine for the bow allows for good shooting arrows. Tip weight affects spine with 125grs being a standard with a 28" finished arrow. Arrow length and head weight both add or subtract effective spine weight of an arrow. Fletching style is generally a personal preference but hunting arrows usually have bigger fletching than target fletching to help stabilize the hunting arrow in flight. Two, 3 or four fletch are the most common with 3 fletch probably more than the others. A simple Eastern Woodland style 2 fletch is very effective and fits in will with primitive archery.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Mafort

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Re: Bare shaft tuning?
« Reply #2 on: December 21, 2018, 10:58:19 am »
So 70-75 lb spine arrows with a 75lb bow at 28” is good when the point weight is 125 grains.  However the point weight I want to use is 165grains. What do my shafts need to be spined at for the heavy points?
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Offline Pat B

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Re: Bare shaft tuning?
« Reply #3 on: December 21, 2018, 02:56:20 pm »
Generally with a selfbow you can start out with arrow spine of about 10# below draw weight.  For the point weight you decrease the effective spine by 5# for each 5gr over 125gr so about 12# or so for the 165gr points. A 28" arrow spined at 70#-75#with the 165gr head should shoot like an arrow spined at 60#-65# more or less. Increasing the arrow length will affect the arrow by decreasing the effective spine by 5# per inch.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Knoll

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Re: Bare shaft tuning?
« Reply #4 on: December 21, 2018, 07:07:09 pm »
The parameters Pat describes are general guidelines that may or may not apply to your specific bow.
One way of determining or zeroing in on what works well for your specific bow is bareshaft testing. And, yes, the arrows are shot without fletching. If arrow shoots straight with no fletching then it's gonna do same with.
YouTube would be a friend to familiarize with bareshaft testing.
Good luck with your arrow tuning adventure!
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Offline Little John

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Re: Bare shaft tuning?
« Reply #5 on: December 26, 2018, 09:27:04 am »
There is tons of good info on you tube about tuning bows and arrow testing. Very good info.
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Offline PEARL DRUMS

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Re: Bare shaft tuning?
« Reply #6 on: December 26, 2018, 11:25:10 am »
Bare shaft tuning is a no fail method for perfect flight and tune. The biggest problem is getting shafts that actually spine what they are marked at. I have found that few batches of matched shafts are actually within 5# of each other. Wayne at TSA sent me a few dozen and those buggers were all within a pound or two. When bare shafting, a 70# shaft will not react like a 75# shaft of equal length. If you have a batch of "matched" shafts I would bare shaft one at a time. Start each shaft at full length and cut down accordingly until they impact correctly. You will end up with a dozen perfectly shooting shafts that will vary in lengths but an inch or so. The most important aspect of bare shafting is form. If your form isn't perfect and repetitive, the shafts flight wont be either. Focus on perfect form each and every shot.
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Offline TSA

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Re: Bare shaft tuning?
« Reply #7 on: January 06, 2019, 10:15:07 pm »
Pearldrums is absolutely correct, if your form varies, so will your results.
Pat has given very good general guidelines that will get you close, and then tune from there.
and as Knoll and John said, there are some great videos out there, here is a link ( at the bottom of the post)to the  best one i have ever seen, i forward this to a lot of people. it was a real eye opener for me!!!

bareshafting is an awesome technique, its all i use, but it does have a few quirks though- which, until you get it figured out can be hair yanking material.
this is a pet topic of mine, so if i may, i shall expound on this a bit.
1. as Pearly said, form!! now you are not going to improve on your form, unless you shoot, and you cant shoot unless you have arrows,!! so what do you do... you do the best you can- you will know when you pulled a bad shot, and just ignore its results. shoot slowly, stay fresh, dont fatigue yourself, take lots of rests a tiny bit of fatigue will lead to changes in form.

2.they tell you for bareshafting to hold your bow nice and vertical- now that just never made sense to me, if i have spent my whole life shooting with my bow canted, and my form has developed around that stance- to change all of a sudden for a few shots, is more than likely going to wreak havoc with ones form, so to counter that, i tilt the target over to match the angle of my canting. i like to draw a vertical and a horizontal line on my paper target face, that helps me to evaluate my results more accurately. i get some one to stand behind me, and see if my canted bow matches the vertical line on the target, and i adjust the target till it matches the bow- not visa versa.
so when i step up to the target i can assess the results , ensuring that i am not interpreting a bit of nock high  or low as incorrect spine. because i have both a horizontal and vertical plane to check the shafts against.

3. arrow breakages.
the first time i spine tested- (long before we were making shafts) and i only had a single  fresh dozen shafts i had just purchased, i figured that the further i stood from the target the less energy the shaft would have when it impacted the target, and that would prevent any shafts from breaking- oh how wrong i was- i broke every single shaft, i started at 10 yards, broke some!! then backed up to twenty and broke some more, and broke my last few out at 30 yards. needless to say i was devastated!!! (--)
i know its counter intuitive, but you need to start close, real close to the target, and i am talking 3' close!!! (A)
the problem with distance from the target, is yes, the velocity and energy is less than that at the bow, but by the time the shaft gets to the target , its so way out of whack- having no fletching to help it at all, that its hitting the target at 45 degrees or worse, and that will break any wooden shaft.
when you are close, yes paradox is having an effect , but if you watch the video, you shoot, you trim, you check, then you step back to 5' , you shoot, you trim, you check, then you step back to 7' etc etc.
its a lot more laborious, but you will break a whole bunch less shafts.

finally, try and get as close as you can in spine before you even start, there are good charts out there, (i have some), and there is a TON of experience on this forum, that will give you a really close starting point

good luck!!
https://www.youtube.com/watch?v=IGOPiriLbcM
« Last Edit: January 07, 2019, 12:45:01 pm by TSA »
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