9 replies to this topic
Posted 15 May 2009 - 05:45 PM
why does a swim bait dont wiggle or tail wont move .til you start moveing the bait a little faster or when you reel faster .. the joints work good.
Posted 15 May 2009 - 07:26 PM
It is not just swimbaits, but all baits that rely on vortex shedding for the movement. A minimum speed is required before the vortex shedding occurs. Sometimes at very slow speeds, the swimbait looks like it is trying to swim. This is a transition speed, vortices are present, but have not organized into the regular pattern of a Kármán vortex street. The minimum shedding speed will vary from lure to lure, but is largely dependent on width and body shape.
Google any of the key words (vortex, vortex shedding, Karman, Reynolds, Strouhal, laminar flow, turbulence) a ton of reading is available, but it will put you to sleep very quickly.
This link: File:Vortex-street-animation.gif - Wikipedia, the free encyclopedia is to a Wikipedia animation of the Kármán vortex street. At the bottom of the page is a list of links were the link has been used in Wikipedia.
Posted 15 May 2009 - 07:41 PM
Yea, what Vodka said...............he took the words right out of my mouth!!
Posted 15 May 2009 - 08:45 PM
Dave, great demo of vortex shedding - you should grab that for YOUR avatar.pete
Posted 16 May 2009 - 06:08 AM
Wow Dave-- This is also worth a look :Pete
YouTube - Vortex shedding from a circular cylinder
Posted 16 May 2009 - 06:17 AM
Great link Pete. That covers it all and answers wavewaters question in video.
You can clearly see the forces that make the swimbait swim.
Posted 16 May 2009 - 07:04 AM
ya i checked it out aaa kool .answer some things i was looking fore .vod man ,pete, hasmai, river man
Posted 20 May 2009 - 09:42 AM
So many vortexes, so little time!
Those are great links, and really make the vortex effect clear.
I've found that making the last joint in a jointed swimbait looser, so that it can swing free, enhances slow speed swimming, and initiates it at a crawl.
Maybe the wider joint starts its own individual vortex?
Also, keeping the tail as light as possible give you the best shot at slow speed swimming. I guess it's because there's less inertia to overcome.
Posted 20 May 2009 - 10:11 AM
Pete and V-Man I now have a slight grasp of the vortex effect on our baits. Thanks for those links.