Crazy Longbow Picture

[bogeyrider63]

that is crazy. first thing i thought when i seen the picture was that the string broke.

[Bladepeek]

I've seen quite a few "high frame/sec" slow motion shots that show the string stretching when the limbs reach brace hight, allowing the limbs to de-flex lower than brace height and then bounce back leaving slack in the string. I've seen the string bounce back and forth several times , nailing the shooter's forearm several times - usually on the rebound cycle. Never saw one quite this wild. There does seem to be a huge difference between the skinny string and the heavier B-50 string, even if the first video is distorted.

Sure makes for a wild video.

[awbowman]

I think it's just the video playing tricks on us.

[rick7]

wow  

[two4hooking]

If it was the rubber pencil trick there would be some blurring going on right?   Those images are pretty sharp.....

Apparently, once the bow lets go of the arrow there is a complex set of recoil reactions that makes the string react faster than the bow limbs.  The kink in the bottom limb surprises me, the bow must be going through it own thing. What I wonder, if the reaction in the bow will always show the same reaction and what that does to the feel and performance of the bow.

[medic77]

That is amazing.  Never would have dreamed it would be that dramatic

[CatSplat]

Originally posted by two4hooking:
If it was the rubber pencil trick there would be some blurring going on right?   Those images are pretty sharp.....

It's not exactly the rubber pencil trick, but it's a similar concept. Many cell phone sensors don't capture the each frame instantly - rather than grabbing a single image every ~1/60th of a second, they grab "slices" of the image and composite them as they go. This has the effect of when a fast-moving oscillating object is filmed, you get a "wave" effect as the camera sees the object in different positions over time as the "slices" captured move across the frame.

It's a bit tough to explain, but here's an older vid of mine of a 50# bow shot at 400 frames per second with a camera sensor that captures full frames instead of "slices.". You'll see the string oscillate, but there's no "bouncing" or snake effect.

  http://www.youtube.com/watch?v=u__f-V5bNs8

[Zradix]

exactly..

[RecurveRookie]

That's really weird!!  Thanks.

[JB]

It looks to me that a lot of the string whip could be caused by shooting 3 under?  Greg could you film it again shooting split finger?

[Richie]

[two4hooking]

Originally posted by JB:
It looks to me that a lot of the string whip could be caused by shooting 3 under?  Greg could you film it again shooting split finger?

That was split finger......the only way to shoot a Hill longbow  

[JB]

Sorry. My mistake

[centaur]

I did a slomo vid of one of my bows a while back, and had similar results. I had no idea that the string looks like it is going to unstring itself on the shot. I'm glad to see that my bow wasn't alone. Who'd a thunk it??

[Aram]

Crazy!
My original thoughts were:
Wooden bow? How much string follow when unstrung?
It almost looked like the limbs sent the string with a lot of initial speed but had a hard time to catch up with the string. No matter the stretch, no string will stretch that much. Just measure the loops in the picture. :0
But I think CatSplat nailed it:
Camera lens distorsion sounds like the most plausible explanation. Try filming the same shot (bow/arrow/string setup) with a regular video camera. No need for slowmo since the effect was noticeable without slowing the film. Also, if the string did that and if we can see it that clearly without slowing the film down, shouldn't we be able to observe the same effect directly?

Edit: ooops, I just saw it. It's a schultz tembo. So string follow is out of the question.

[Kris]

VERY COOL!  Love this sort of pic!  Makes you think differently about things and potential a diagnostics tools.

Kris

[Sixby]

Its the camera. Strings actually act nothing like that at all ,. Its almost 100 percent camera distortion. Look at the bow limbs. They look the same , bent and distorted. There is a tremendous amount of movement at the shot when the bow hits brace and Kirk Lavender has some awesome movie pics of that. The movement is not a wild ossilation like that though but mostly back and forth depending on limb recovery and stability.

There is none of what that camera is showing during the shot though.

God bless, Steve

[Zradix]

X2

[grayfeather]

great to watch