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Author Topic: Slow motion videos of primitive archery  (Read 14425 times)

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Offline bowtarist

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Re: Slow motion videos of primitive archery
« Reply #15 on: February 20, 2014, 04:46:28 pm »
Great stuff!! You've been very busy. Will watch more when I have more time. Good luck w/ the book. If you've been making bows for 15 years you must have started when you were 5 as young as you look. Thanks for sharing. Cheers, dpgratz
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(:::.)    Osage music played daily. :)

Offline Tuomo

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Re: Slow motion videos of primitive archery
« Reply #16 on: February 21, 2014, 02:33:16 am »
JW_Halverson, yes, I really want to see how string material is affecting bow limb vibrations. I have Astro Flight and Dacron, so I will make the comparison when I have time, I hope soon!

One thing I want to see, is how different spine bare shafts are behaving.

Bowtarist - born -77, not so young...
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mikekeswick

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Re: Slow motion videos of primitive archery
« Reply #17 on: February 21, 2014, 04:15:57 am »
I would be very interested to see how molly style bows behave when shot compared to say a pyramid. Eg. how much the limbs buckle when shot. I would also dearly love to see what's going on with some of my hornbows when shot. I have a feeling that reflex/deflex bows/mollies have an advantage in speed over straight,whole limb bending bows because of their resistance to buckling when the string hits brace height after being shot.
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Offline Carson (CMB)

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Re: Slow motion videos of primitive archery
« Reply #18 on: February 21, 2014, 09:45:48 am »
Great stuff indeed!  That is something I have wanted to do for awhile.  It is like taking a microscope to archery.  I love the inquisitive approach to it along with the stuff blowing up cool factor videos.  Would be great to see your book in English. 

I would love to see the difference in recovery of parallel vs tapered wood arrows. 
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"The bow is the old first lyre,
the mono chord, the initial rune of fine art
The humanities grew out from archery as a flower from a seed
No sooner did the soft, sweet note of the bow-string charm the ear of genius than music was born, and from music came poetry and painting and..." Maurice Thompso

Offline Badger

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Re: Slow motion videos of primitive archery
« Reply #19 on: February 21, 2014, 12:28:38 pm »
   I would like to see some very light flight arrows shot. For some reason I have to nock the very light arrows much higher than I would shooting a target arrow or I get the porpoising affect. Maybe 3/8" higher.
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Offline JW_Halverson

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Re: Slow motion videos of primitive archery
« Reply #20 on: February 21, 2014, 01:29:42 pm »
This high speed photography has great potential to show WHY things work the way they do.  It can be an excellent tool for proving or disproving a lot of old wives tales!
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Guns have triggers. Bicycles have wheels. Trees and bows have wooden limbs.

Offline Onebowonder

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Re: Slow motion videos of primitive archery
« Reply #21 on: February 21, 2014, 01:37:15 pm »
Quote from: JW_Halverson on February 21, 2014, 01:29:42 pm
This high speed photography has great potential to show WHY things work the way they do.  It can be an excellent tool for proving or disproving a lot of old wives tales!

Careful with such fancy new Tech!  It's likely to TICK OFF some of those old wives!!!

OneBow

 
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Offline Tuomo

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Re: Slow motion videos of primitive archery
« Reply #22 on: February 22, 2014, 05:15:27 am »
Mikekeswick – the buckling of the limb is just residual energy of limbs. Dynamic draw force curve of the bow is telling more of the dynamics of the bow. Hopefully I can soon film acceleration of different kind of arrows. Or, filming is easy but analyzing is laborious.

Carson – I will film parallel and tapered arrows too. We have here in Finland now winter, which means that we have very little daylight. And I need more light to film arrow flight from bow to target. It will be interesting to see how bareshaft arrows are behaving.

Steve – I am flight shooting fan (personal best 300 yards with 52# bow)! I have a couple of flight bows, very light flight arrows, so I can try it. My lightest arrows are about 200 grains and my flight bow is about 60#. Could the reason be positive tiller? You should try it zero or even negative tiller.
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Offline Gordon

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Re: Slow motion videos of primitive archery
« Reply #23 on: February 22, 2014, 09:57:11 am »
Great videos! I'm glad that someone finally disproved the myth of uneven limb timing - thank you!
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Gordon

Offline JW_Halverson

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Re: Slow motion videos of primitive archery
« Reply #24 on: February 22, 2014, 08:51:10 pm »
Quote from: Gordon on February 22, 2014, 09:57:11 am
Great videos! I'm glad that someone finally disproved the myth of uneven limb timing - thank you!

Like you, I was so happy to learn that uneven limb timing was a myth....that is, until I began to ask JUST WHAT DOES CAUSE THE HANDSHOCK?!?!?!
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Guns have triggers. Bicycles have wheels. Trees and bows have wooden limbs.

Offline Tuomo

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Re: Slow motion videos of primitive archery
« Reply #25 on: February 23, 2014, 02:09:27 am »
Yes, uneven tiller is NOT the reason of handshock. Or not the most important reason, maybe a minor, depending on situation. That particular bow had no handshock - it was elm, about 42# @ 27".

Please, you have to wait a moment, I have new material of unbalanced bow limbs!
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Offline Tuomo

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Re: Slow motion videos of primitive archery
« Reply #26 on: February 25, 2014, 03:08:09 am »
There is some new slow motion videos in Youtube. I was comparing string material differencies (Dacron and Astroflight).

I think, the best was this: http://youtu.be/GuvGkApgsm4
Release without an arrow and without gripping the bow. The bow flew about 3 meters away!

More is coming later!
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Offline Del the cat

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Re: Slow motion videos of primitive archery
« Reply #27 on: February 25, 2014, 03:57:15 am »
I love the way the bow sort of moonwalks off doing it's own funky thing ;D
Del
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Offline Carson (CMB)

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Re: Slow motion videos of primitive archery
« Reply #28 on: February 25, 2014, 05:38:39 pm »
Quote from: Del the cat on February 25, 2014, 03:57:15 am
I love the way the bow sort of moonwalks off doing it's own funky thing ;D
Del

 ;D ;D ;D
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"The bow is the old first lyre,
the mono chord, the initial rune of fine art
The humanities grew out from archery as a flower from a seed
No sooner did the soft, sweet note of the bow-string charm the ear of genius than music was born, and from music came poetry and painting and..." Maurice Thompso

Offline PatM

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Re: Slow motion videos of primitive archery
« Reply #29 on: February 28, 2014, 06:53:34 pm »
Bump to review the comparison of Dacron versus FF.
  Does this prove that non-stretch diminishes handshock?
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