Aurum Flake wrote:You are gonna need a hell of a lot of water to run a 6, and if you make it a suction nozzle, you have a bunch of hose to wrestle around as well as costs. If you went combo (running both suction nozzle and jet tube at the same time), you'd have to have 2 been engines and 2 big pumps to run such a beast in addition to the extra presure hose. So, if you are working in such a shallow water area that you'd wanna use a suction nozzle, you'd burn up a pump trying to keep a 6 inch opening flowing water. A 4 factory inch machine moves about a 150 gallons a minute. Now, you try building a combo machine like your are talking about, without even looking up a chart, i'd guess bear minimum wild number off the top of my head would probably need 300 gallons to work in. Now, on top of that, if you are working in shallow water (probably recirculating your process water) the material would become so murky and gritty you would be mining blind and by brail (not much fun but can be done) but more importantly you'd be running that grit through your pumps and you'd eat them up quicker than a whistle.
Now, if you can get past mining blind, wrestling that hose, the risk to your pumps, throw in the fuel costs to run 2 engines like that for something that you can build one, or the other. Heck, for that matter, the price of the rig you'd build, you would be better off in my oppion to make 2 complete seperate getups that you could simply switch out depending if you are working shallow or deep water. BUT, i think a 6 is going to tire you out if you try and make a suction nozzle out of it and will be unhappy with its fuel economy and results.
Rule of thumb, suction nozzle = shallow water, jet tube = deep water.
Best of luck
alaskaflounder wrote:I have some parts available for building a 5" like you want
Price negotiable or willing to trade for cool stuff.
Aurum Flake wrote:Rookie,
You can run a 5 or a 6 on one pump, its just the price of pump and engine go up is all. More jets into the tube can cut down on rock jams.
There are alot of variables on the 5 vs 6 inch machine route. I'm not going to address those at this time.
Some people are probably tired of hearing me say this, but this is how i go at it. First, I find my dirt. Then i figure out how i'm gonna recover my values and what size my values are. Can i back my truck/trailer right to the water or am i gonna have to pack my gear in? How much and how far do i wanna pack it? Another thing to consider is how wide and deep is the waterway i wanna mine? How much overburden do i have to strip off at what depth to get to the pay later? What is the size of material i wish to recover in what quantities? How much waterway do i have to work (I.E. If i run a 6 instead of a 5 and get done quicker, am i gonna have to find a new place to mine sooner?) Do i have to mine at a depth greater than 20 feet? 40 feet? Deeper? Swift water, slack water? How large/strong/stout of a person are you to handle the hose? What type of stamina do you have? Have you spent many hours underwater on a hooka system moving rocks for an 8 hour day? Is the rock bottom up and down or rather calm and flat? Am i going to have helpers, or am i a one man mining show?
There are many other questions that i've forgoten to ask such as how much to spend, travel time, what do you expect to recover and on and on and on and on.
I said i wasnt going to address some of the 5 vs 6 inch machine route, but upon re-reading what i already typed above, it appears i did.
If you havent spent much time mining under water, i'd go buddy up with someone and do it for a day or more before you plunk down a bunch of time and money on your own gear. I'd sugguest reading anything by Dave McCracken (theres alot of free info AND videos on the Net). He's writen ALOT of material that will addres much of what i've already writen and more than i'd ever think to write. Makes me wish i'd thought of listing him first instead of me spending all this time.
Food for thought.
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