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Post by 4cs (Pat) on Nov 19, 2008 14:44:07 GMT -5
Guys
Here is some depth info that I have put together for the snap weights. This data is based on the info taken from the Precision Trolling book, actual depth readings with snap weights using Ron's (Digitroll) portable depth gage and some Geometry and Physics. Also this is based on 2.5mph GPS speed and 20lb test line and letting 50' of line out, attaching your snap weight and then letting out 100' more line, then repeating with 50' of line out, snap weight, and then 150' of more line out, then repeating again with 50' of line out, snap weight and then 200' of more line out. I believe this data will get you into a "Ballpark depth" give or take a few feet.
Snap Weight --- 1oz -- 2oz -- 3oz -- 4oz
50'/100' ------- 10' --- 16' --- 24' --- 30' 50'/150' ------- 20' --- 26' --- 34' --- 40' 50'/200' ------- 30' --- 36' --- 44' --- 50'
For every oz of weight you gain 6' in depth and for every 50' more line you gain 10' in depth.
I also tried the 50%/50% method so instead of 50' line, snap weight, 100' line it was 75' line, snap weight, 75' line but I did not get good readings so I will try to get more data on this method. Hope this is useful.
Pat
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Post by Thorny (Rob) on Nov 19, 2008 14:51:42 GMT -5
Pat I dont think that 50/200 with 1 oz can dig to 30 ft at 2.5. Thats a lot of drop for a 1 oz weight?
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Post by Deleted on Nov 19, 2008 15:19:14 GMT -5
Pat,
Thanks for the data. I like the extrapolation about 6 ft of depth for each 1 oz of wtd added.
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Post by salmoneye on Nov 19, 2008 15:32:08 GMT -5
Pat I dont think that 50/200 with 1 oz can dig to 30 ft at 2.5. Thats a lot of drop for a 1 oz weight? I tend to agree... I can't even get to 30' with a 1.5# ball at Salmon speeds... Way too much drag between the lures, line, ball and cable...
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Post by 4cs (Pat) on Nov 19, 2008 20:21:24 GMT -5
Yea I forgot to factor in all the other stuff when I did my extrapolation for the 1oz, I'll take a reading with the 1oz at 50'/200' with Ron's depth gage and see what comes up. I know there is a "breaking point" where the weight will actually start to rise again because of all the drag forces. I know that the other depths are fairly close because they agreed with the data in the book, my calculations and the actual readings.
Hey Eye you should be able to get that 1.5# ball down to 30'. You may have to let out approx. 50' give or take on the line counter on the downrigger but you should be able to get there.
Pat
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Post by An Bradon Charters on Nov 19, 2008 21:10:47 GMT -5
Pat interesting, I do not use snap weights. Instead as you know I use egg sinkers. I used to attach a ways up the main line. But in the past couple years i attach them to the main line above the swivel. I then attach a 6-8 foot leader. I really have no idea how deep they run.But at a 100 feet of line out up until July they are deadly. I will say they are more productive in the morning and evening. But I have also caught fish all day long on them.I was guessing they were about 25 feet at 2.5 gps. I find it much easier to use the egg sinkers versus snap weights. I do not have to mes around with them. But at the same time I am learning that the snap weights have a broader range. At 150 back 1 0z in July I find they only really work in the am. Capt. Tony www.anbradoncharers.com
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Post by tamiron on Nov 20, 2008 1:55:07 GMT -5
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Post by MarknFish (Mark) on Nov 20, 2008 6:34:14 GMT -5
This is interesting info. as I've never used the snap weights or such trolling for salmon. I used to use them a lot fishing the Clyde River in spring and fall when the salmon were in the river. I experimented a lot with snap-ons, eggs and split shot and found I always had the best success with the Lindy no snags tied to a 3 way with a short drop on the weight tied with 6lb mono. They performed the best around snags and rocks when spinning emerald shiners in the spring. They were also deadly on big fish in October with a Purple/Silver Pin's Minnow about 8 ft behind the weight on bottom drifting/jigging with the current. I also once caught a small laker in the river doing this. I have also had success with this on walleyes in Lake Carmi in late summer with a crawler harness. I guess it stands to reason this would work for salmon as well.
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Post by 4cs (Pat) on Nov 20, 2008 10:14:10 GMT -5
Tony, Mark
You guys are basically doing the same thing only using different methods. They all basically work the same way, a weight to get the lure down being it a snap weight, egg sinker, drop sinker, so a 1oz weight being a snap weight, egg sinker, drop sinker at 100' of line out will bet you into the ballpark of 10' down and the rest of the readings should also be in the ballpark too.
Pat
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Post by Silver Fox on Nov 20, 2008 16:15:22 GMT -5
Thanks Pat
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Post by voyager on Nov 20, 2008 20:45:20 GMT -5
Pat,
What a coincidence. I was thinking of this topic the other day and pulled from the depths of the old fishing library a copy of "The Troller's Handbook" by Ray Rychnovsky. The book has charts of the depth profile of different weights at various speeds based on certain amounts of line out and line size. The charts are nearly identical to your calculations. Excellent work!
I often use a set-up similar to Tony's only with Bead Chain in-line trolling sinkers instead of the slip sinker. What I like about the Bean Chain's is that it is easy swap weights to go heavier or lighter ( I have 1/8 oz to 3 oz weights to choose from). A six foot leader seems to work fine.
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Post by 4cs (Pat) on Nov 20, 2008 21:59:59 GMT -5
Paul
That's the nice thing about the bead chains and the snap weights you can change the weights in a second. Just wondering about what the book says about the depths of a 1oz weight could you post them, that is the only one I'm not sure of and do you know if that book is still in print ? You must have one heck of a fishing library and thanks for the comment.
Pat
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Post by Deleted on Nov 21, 2008 9:24:36 GMT -5
Thats great to hear about the accuracy. I didn't think my depth meter was in error.
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Post by voyager on Nov 21, 2008 20:26:52 GMT -5
Pat, The book's graph for 20 lb test doesn't have 1 oz weights specifically (smallest is 2oz). However, with a little interpolation it looks like 100 ft of line at 2.5mph will put the line down to something like 8-10ft. The 10 lb test graph looks to be closer to 15ft down. Interestingly, all graphs show an inflection point at around 2.3 to 2.5mph. Once you slow down below those speeds the depth increases significantly. The book is still in print. It's published by Frank Amato Publications. These guys put out some really great books. www.amatobooks.com/mm5/merchant.mvc?Screen=SFNTOh, about the library. Not only is it impossible to have too many fishing lures, it is also impossible to have too many fishing books or magazines. Besides it gives the wife one more thing to rib me about..."You'd think after reading all those books about fishin' you'd be doin' a lot more catchin'!"....Oh well.
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Post by 4cs (Pat) on Nov 22, 2008 9:08:44 GMT -5
Paul
Thanks and that's is what I was looking for, that tells me that the break point is about 2.5mph, after that you would see that the lure/line would start to rise, more good info. I looked on the web for that book and found a number of places that have it and also many used copies for around $8, sounds like that is going on my Christmas list.
I don't have that many books but I do have a lot of info I keep from magazines, after I read the whole magazine I then cut out the articles that I want to keep and then put them into different folders by category. If you want to add to your collection there are some books written by Capt. Dan Keating about fishing for Kings but a lot of the info you can use for trolling here for Atlantics. There is also a couple of DVD's by him and Capt. Chip Porter that are good to watch also, just thought I add to your addiction LOL.
Pat
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