Slo-mo string action.....

[larry]

my initial thought was that maybe your bottom limb is way stronger than the top

[Guru]

Originally posted by Hermon:
I still think it is some kind of distortion either from the lens or the slow motion program.

Given how a bow works, I don't see any way that the arrow can be going forward and part of the string is "lagging" behind.  Now side to side as it comes off the fingers I can understand, and as the bow comes back to brace as the arrow leaves I can understand, but not what we are seeing.      

That's a good point bud, I was thinking the same thing....how can the middle of the string be ahead...interesting...

[Bladepeek]

You can see a lot of the distortion Sean B noted in the string during the draw. You know the line of the string is "straight as a stretched string", but it appears curved as it is drawn, befor ethe shot.

[Dan Adair]

Originally posted by moebow:
One thing that stands out to me is the apparent downward bend of the arrow as it is drawn.  That MAY be due to the camera/lens optics involved, but IF the arrow is being bent down by the draw technique, that will make it "bounce" upward giving that tail high arrow flight that you see in the video.

Again, hard to say for sure, but this is common to vertical (nock high) tuning problems.

Arne

How does one overcome this issue?  Not to Hijack the thread, but this is something I struggle with.  I've video'd myself plenty, and I can't see a bend on the arrow.  It goes away completely when I shoot 3 under, both bareshaft and paper tunes are bullets.  It bugs me...  I feel like this is what's keeping me from getting my spot league scores into the 270's.

[moebow]

Dan,

Could be a couple issues.  You say it goes away 3 under so first place to look is allowing the index finger to press down on the top of the arrow nock.

String pinch can do this and also, too much tension in the wrist which can cause the index finger to press down.

Be sure your fingers are as perpendicular to the string as possible, hand, wrist and forearm relaxed.  You MAY want to try a finger spacer to see if that helps.

Arne

[Mike Gerardi]

Film someone else shooting that same bow. See if there is a difference.

[Dan Adair]

Arne,

Thanks for the advice.  I know I stay perpendicular to the string, and don't twist or stress my bowhand at all.

I also know I keep my hand pretty relaxed...  That's why I get string pinch like a mofo.  I've never made an effort to fight it, seems like it'd introduce stress to the hand if I tried to keep from pinching the nock.  I shoot a glove, I'll try a spacer in there and shoot bareshaft some today.

[maineac]

Could the arrow be pulling that portion of the string forward as the silencer slows the upper portion down.  I wonder if a loose knock would look the same,or a string with no silencers.  It is always cool to watch things like that.  I think some follow up video is in order.

[Guru]

Originally posted by Mike Gerardi:
Film someone else shooting that same bow. See if there is a difference.

I'll have to let Cade shoot it and see bud.

[Guru]

Originally posted by maineac:
Could the arrow be pulling that portion of the string forward as the silencer slows the upper portion down.  I wonder if a loose knock would look the same,or a string with no silencers.  It is always cool to watch things like that.  I think some follow up video is in order.

Nock was very loose bud. I always shoot what most might consider too loose. This one was even looser...

[Mamba]

Great discussion.  I would try to get both limbs in the next video too.  I'll bet you see some weird stuff there too.

[maineac]

Ok, scratch that theory.  I love puzzling this type of stuff out.  I wonder if the bottom string looks the same?

[Guru]

It may be a while(busy, busy), but I will try to get top and bottom in the same vid.

[Wannabe1]

While I have no conjecture to offer up, that is a very fun video to watch! Thanks for sharing it Curt.  

[ChuckC]

Please also re-position that camera to show from the left (unobstructed) side so we can see a true representation of the string / limb recovery / arrow motion.

ChuckC

[rraming]

Originally posted by moebow:
One thing that stands out to me is the apparent downward bend of the arrow as it is drawn.  That MAY be due to the camera/lens optics involved, but IF the arrow is being bent down by the draw technique, that will make it "bounce" upward giving that tail high arrow flight that you see in the video.

Again, hard to say for sure, but this is common to vertical (nock high) tuning problems.

Arne

I saw the bend as well, Ken Beck mentions that in MBB volume  1 I think. I use 2 nocks for carbon shafts on one of my recurves due to a nock high issue, that bow is near even tiller though shooting split finger.

I'm sure the weight of the silencer and wind detector cause the loop. Skinny string too? For even a lighter string.

[LA Trapper]

I am with Arne, it appears there is pressure on the arrow and a slight bend.  Perhaps it is an illusion.  

I watched a long bow video a couple of months ago that had the same loop.  Very consistent to what you have captured on video.

I will try remember where I saw it.

Billy

[LB_hntr]

Very cool video.

[Zradix]

There's no way for the string to have that much slack.
The limbs will always keep tension on the string.

The weird "loops" we're seeing is caused by the way digital cameras scan the image while the string is in motion.

...slightly similar to the "rubber" pencil trick.

[Major Boothroyd]

I think it is largely due to the type of sensor in that camera, and the way it refreshes the frame.

If you look at GoPro type footage (I'm not suggesting that this was shot with a GoPro) of helicopter blades or airplane prop blades, for example, the blades will frequently render curved or bent, even though the blades aren't bending in that manner in reality.

This typically comes from using cameras with certain types of sensors that don't incorporate "global shutters" like many professional motion picture cameras do.

I'm not an expert in motion picture camera design and engineering, but I am a cinematographer by profession.