scrubs Posted October 26, 2013 Report Share Posted October 26, 2013 I was looking at Lurebuilding 101 with the idea of downsizing a jerkbait plan. The Divani VG II in the Hybrid jerkbait section caught my eye. It's roughly 5" long and 45 gms. If I go to a 3" bait the volume will be .6 x .6 x .6 or .216 of the original. So you'd think that the weight would be reduced by the same proportion or 45 x .216 = 9.7 gms. That's roughly 1/3 of an oz. which seems pretty light for a round shaped bait that's 3" long by 7/16 thick and is supposed to sit with just a bit of the back out of the water. Am I missing something here? bill Quote Link to comment Share on other sites More sharing options...
RayburnGuy Posted October 26, 2013 Report Share Posted October 26, 2013 I won't even attempt to figure out the amount of ballast using the figures you supplied because when I went to engineer school they made me sit in the caboose. I would recommend that you familiarize yourself with the Archimedes principle of water displacement. Any time I'm prototyping a new lure I use this formula to get me in the ballpark as far as ballast is concerned. What the formula will tell you is how much ballast it will take to make your bait neutrally buoyant. After using this process for a while you can get a pretty good idea of how much ballast it will take to make a bait barely float, be a slow or fast sinker, etc. hope this helps, Ben Quote Link to comment Share on other sites More sharing options...
scrubs Posted October 27, 2013 Author Report Share Posted October 27, 2013 Thanks Ben. Much easier to use your method rather than my trying to figure the right amount. I took two tries at mechanical engineering before finishing with something easy like computer sci and math. :-) bill Quote Link to comment Share on other sites More sharing options...
RayburnGuy Posted October 27, 2013 Report Share Posted October 27, 2013 Thanks Ben. Much easier to use your method rather than my trying to figure the right amount. I took two tries at mechanical engineering before finishing with something easy like computer sci and math. :-) bill My pleasure Bill. If I can help you with implementing the Achilles method just give me a holler. I use it all the time and even keep a water filled plastic container on my workbench so I'm not getting up and running to a water faucet every time I want to use this process. Ben Quote Link to comment Share on other sites More sharing options...