Author Topic: My completed project... Bazooka build  (Read 23463 times)

Rich Robinson

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My completed project... Bazooka build
« on: January 21, 2014, 01:00:50 PM »
I wanted to share my completed project.  I built a Bazooka gold trap. I bought some ABS plastic and built it to specs aside from making my fluid chamber larger that the true Bazooka. Looking forward to the February meeting and trying it out in the creeks...
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Jcbdc

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Re: My completed project... Bazooka build
« Reply #1 on: January 21, 2014, 01:19:30 PM »
Looks good!
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Re: My completed project... Bazooka build
« Reply #2 on: January 21, 2014, 03:40:01 PM »
Looks Good, what matting did you use?

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Re: My completed project... Bazooka build
« Reply #3 on: January 21, 2014, 04:01:53 PM »
Looks very nice. I am intrested to see how the bigger chamber works.

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Re: My completed project... Bazooka build
« Reply #4 on: January 21, 2014, 04:16:32 PM »
Great job indeed, also interested in the bigger box (how much bigger is it)

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #5 on: January 21, 2014, 04:30:28 PM »
Well, being a bazooka, there is no matting. Instead it has a fluid chamber that the gold gets trapped in.. The fluid chamber is 10 1/2 inches...
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Rich Robinson

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Re: My completed project... Bazooka build
« Reply #6 on: January 21, 2014, 04:53:35 PM »
Also, The length on this is 36".   I am also making a 24" super mini for Sharon with a larger fluid bed as well. I still have plenty of material left. Had to buy a 4' X 8' sheet of ABS... LOL..... Here are a few more pics...
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Re: My completed project... Bazooka build
« Reply #7 on: January 21, 2014, 07:11:14 PM »
That just looks sharp.
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csa_atty

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Re: My completed project... Bazooka build
« Reply #8 on: January 21, 2014, 07:24:02 PM »
Nice it's time to get it dirty. Great build Richard, looks great.

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Re: My completed project... Bazooka build
« Reply #9 on: January 21, 2014, 07:33:56 PM »
How did you weld it together or get to bond?

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Re: My completed project... Bazooka build
« Reply #10 on: January 21, 2014, 07:40:55 PM »
I used an ABS welding glue that was recommended by the ABS Manufacturer. It brakes down the surfaces of the abs and fuses it together, creating a bond the gets stronger over several weeks , literally fusing the abs together.
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nx4cnx4c

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Re: My completed project... Bazooka build
« Reply #11 on: January 21, 2014, 08:03:32 PM »
I used an ABS welding glue that was recommended by the ABS Manufacturer. It brakes down the surfaces of the abs and fuses it together, creating a bond the gets stronger over several weeks , literally fusing the abs together.
Where did you get this glue?

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #12 on: January 21, 2014, 08:11:27 PM »
I got it from the ABS supplier. Can't just get it at home depot.. That is the only place I could find it. then I called the ABS Manufacturer and the glue manufacturer to find out if it was the best to use for purpose ...
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nx4cnx4c

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Re: My completed project... Bazooka build
« Reply #13 on: January 21, 2014, 08:28:59 PM »
I got it from the ABS supplier. Can't just get it at home depot.. That is the only place I could find it. then I called the ABS Manufacturer and the glue manufacturer to find out if it was the best to use for purpose ...
Thanks

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #14 on: January 21, 2014, 08:31:06 PM »
You are welcome, So you thinking about building one?
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nx4cnx4c

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Re: My completed project... Bazooka build
« Reply #15 on: January 21, 2014, 08:42:07 PM »
Maybe.  I've made a bunch of modifications to mine and could use some of that glue on it.  I would like to have one between the size you made and the small one and my partner works at a place that uses ABS Material so we could probley get the material and glue.  I'll have to ask him if it would be possible if so then I would like to build one like I described above.

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #16 on: January 21, 2014, 08:49:45 PM »
I went with the 36" because I understand tha t it is the most popular size the Bazooka sells, processes a 5 gallon bucket of material in 30 sec.  Pretty amazing
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BagLady

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Re: My completed project... Bazooka build
« Reply #17 on: January 22, 2014, 09:14:10 PM »
Is that like plexiglass? Did you spray it with something or did it come in that color?
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Rich Robinson

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Re: My completed project... Bazooka build
« Reply #18 on: January 22, 2014, 09:53:17 PM »
It is not plexiglass.  It is ABS plastic, much stronger... It is what the Bazooka is made of... It comes on many colors... I just made in black
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Re: My completed project... Bazooka build
« Reply #19 on: January 23, 2014, 07:39:53 AM »
Saw a video on youtube of one made from plexiglass itappaered to work well. Rryder is going to make one out of plexiglass. Just needs dimensions but you did awesome job ...congrats on your new sluice!
my videos on youtube are under Pastor sam and Victoria. I have several playlist so look at the prospecting list for some goofy prospecting vids, Be blessed, and enjoy!

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #20 on: January 23, 2014, 08:00:22 AM »
Thanks, I appreciate that. I too am going to make another one from Plexiglass, actually I impact polycarbonate (Bullet proof Glass)... I want to do one like that so be able to experiment with the Fluid bed... I wan to determine the best hole size, pipe size and number of holes and pipes to achieve optimal results. The one I made is 36' long, 6 1/2" tall. 15'wide tapering to 9"
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Tom Twosocks

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Re: My completed project... Bazooka build
« Reply #21 on: January 23, 2014, 01:58:40 PM »
Instrial name for Polycarbonate is LEXAN.

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Re: My completed project... Bazooka build
« Reply #22 on: January 23, 2014, 02:33:11 PM »
the name lexan is actually a registered trademark name that GE ( now called sabic  Innovative Plastics) has. there are a few other companies out there that make the same material just call it different names.
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kbernard

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Re: My completed project... Bazooka build
« Reply #23 on: January 23, 2014, 08:19:15 PM »
Very nice, What did you use for grizzly bars?

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Re: My completed project... Bazooka build
« Reply #24 on: January 23, 2014, 08:34:09 PM »
Well, It is a funny story...  I have access to a machine shop that wilol make the grizzly for me so I plan on have some made a lot tighter that the on that is on it. It is 1/2 inch on center... I plan on having some made from stainless that are 3/8 OC abd one that is 1/4 OC. The on that is on it now was made from an old CD rack that I got at Goodwill for $2... It is Hi tensil and not prone to bend...
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Re: My completed project... Bazooka build
« Reply #25 on: January 23, 2014, 08:42:05 PM »
Great idea, Ive been looking for grizzly bars for my gold trap. I almost cut my grill up lol.

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Re: My completed project... Bazooka build
« Reply #26 on: January 23, 2014, 08:52:57 PM »
LOL, I was looking for an old grill grate myself. Bazooka has 2 different sizes they offer, a 1/2"OC and a 3/8" OC. You can actually attach a piece of 1/4"  hardware cloth to the grizzly to classify it down.
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Re: My completed project... Bazooka build
« Reply #27 on: January 24, 2014, 08:33:40 PM »
Since the prospecting world is all about the bazooka style sluices I too must build one. Soi might pm you for info if you don't mind this spring.  I might just create one that shovels material into its self  wouldn't that be cool.
my videos on youtube are under Pastor sam and Victoria. I have several playlist so look at the prospecting list for some goofy prospecting vids, Be blessed, and enjoy!

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #28 on: January 24, 2014, 10:04:19 PM »
LOL, absolutely, Happy to share .... Was thinking about making one with a fluid chamber with a slide out drawer...
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Re: My completed project... Bazooka build
« Reply #29 on: January 24, 2014, 10:09:40 PM »
I was telling Delbeck that I was thinking about making a removable fluid box for one so you don't have to take the sluice up to clean it.
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Rich Robinson

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Re: My completed project... Bazooka build
« Reply #30 on: January 24, 2014, 10:13:00 PM »
Thats what I have been thinking about... First the larger fluid chamber , then the slide out... As long as you can get a good seal so you dont lose the gold... Tee other thing I did with the one I made was to make it where I could remove the pipes so that I could make changes if necessary to improve the fluid bed...
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Re: My completed project... Bazooka build
« Reply #31 on: January 25, 2014, 05:41:45 PM »
Looking for another winter project - your bazooka looks great!  Where did you get your plans?  See you're from Dickson, was your ABS supplier local? 

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Re: My completed project... Bazooka build
« Reply #32 on: January 25, 2014, 09:49:12 PM »
Well, got the Abs in nashville... All of the dimensions were posted on the bazooka website. So  i just went from that... The fluid chamber was pretty easy to figure out except for how many holes in the pipe and the size so I just called and asked Bazooka... I did make my fluid chamber bigger... Did a test today, took some material at a local creek , put 25 pieces of flattened lead shot in it and ran it in the creek with a five gallon bucket of material. Recovered 24 pieces of the shot
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Rich Robinson

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Re: My completed project... Bazooka build
« Reply #33 on: January 28, 2014, 07:37:36 PM »
OK everyone,
I have run two test with my Bazooka. I ran both tests in local creeks. I used 25 pieces of deformed lead shot mixed with material out of the creeks. in the first test I recovered 24 of 25 pieces. in the second test I recovered 25 of 25 pieces... even with the larger fluid bed...
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Larry Jordan

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Re: My completed project... Bazooka build
« Reply #34 on: January 28, 2014, 07:47:47 PM »
Interesting build. I like the idea of being able to change the number and size of the pipes. I would think that the more pipes you have, the smaller the the pipe should be and maybe a few less holes in the pipe inside the fluid bed. Your results will be a great education for all of us

Rich Robinson

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Re: My completed project... Bazooka build
« Reply #35 on: January 28, 2014, 07:59:14 PM »
I plan on building one from clear polycarnonate so the fluid bed can be seen. I want to see what works best
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htmagic

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Re: My completed project... Bazooka build
« Reply #36 on: January 29, 2014, 12:08:08 PM »
Interesting build. I like the idea of being able to change the number and size of the pipes. I would think that the more pipes you have, the smaller the the pipe should be and maybe a few less holes in the pipe inside the fluid bed. Your results will be a great education for all of us
Folks, as an engineer, I can tell you it's all about velocities in the fluid bed.
Knowing what the original Bazooka fluid bed chamber is and the number and diameter of pipes, you can work out a cross sectional area (CSA) of the inlet pipes for the total cross sectional area (CSA) of the fluid bed chamber.

You would probably want to keep the ratio of the CSA of the inlet to the CSA of the chamber constant. Although having a transparent chamber would allow one to see the fluid bed "boiling" and to tweak for best results.

But it all boils down to the settling (or terminal) velocity of a gold particle of a certain diameter and a certain density vs. all the other stuff in the sluice.
May the FORCE be with you and have a magical day!

MagicBill

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Re: My completed project... Bazooka build
« Reply #37 on: January 29, 2014, 12:18:51 PM »
Thanks Bill, I am no engineer for sure so any input or recommendations are welcome. I got the basic information on the fluid bed from Todd Osborne, but of course I made the fluid bed bigger. so If you have any thoughts, I definitely welcome them. It would be great to have the insight of someone who understands those calculations. I am just a visual person. If I see it I can make it, but the mods for me are just trial and error... So please feel free to make some recommendations...

Richard
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Re: My completed project... Bazooka build
« Reply #38 on: January 29, 2014, 12:39:00 PM »
Am in the process of building mine.  Approximately same dimensions - 36 X 15 1/4 X 11 X 4 (OD)
Have some  FRP paneling and FRP adhesive so will use that along with exterior grade 1 X 4.

The fluid bed will have 4 - 1/2" pvc leading out to a common outlet with a shut-off valve.  The 1/8" holes 1" apart length of the bed length.  This way I can control stratification per conditions.

Instead of getting a small roll of 1/4" galv. mesh; went over to the gutter section and got one of those leaf guards for gutters -  the curved one is 6" and diamond holes are 3/16 X 1/4" with a slight riffle in them.  It has clips on it  that can work as hinges to inspect the bed stratification.

Also have a piece of the white shelving from Lowes that has 1/2" spacing to use as a top grizzly when using the sluice with course material.  I intend to use this primarily on he outlet of my hi-banker/dredge unit's sluice in order to ensure I get all of the fines.




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Re: My completed project... Bazooka build
« Reply #39 on: January 29, 2014, 01:29:21 PM »
Richard,

For a more detailed discussion on terminal velocity, look at this article:  http://en.wikipedia.org/wiki/Settling_velocity#Terminal_velocity_in_the_presence_of_buoyancy_force

Now if the velocity in the bed is faster than the gold terminal settling velocity, the gold gets flushed out of the chamber.
Simple as that, sort of. There is a buoyant force to consider. Some flakes and fine gold will float on the water and that buoyancy should be factored in.
So with the equations, you could design a sluice where the terminal velocity  for a 400 mesh gold particle drops in the chamber while the lighter stuff gets flushed out...

Dave, please take pictures of your build. Seeing how people do things is always interesting...
May the FORCE be with you and have a magical day!

MagicBill

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Re: My completed project... Bazooka build
« Reply #40 on: January 29, 2014, 01:39:35 PM »
or have a tanker truck full of jet dri to crash into the creek up stream with a big leak so the gold wont float.  ::) ::)
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Xaero

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Re: My completed project... Bazooka build
« Reply #41 on: January 29, 2014, 09:36:04 PM »
I used an ABS welding glue that was recommended by the ABS Manufacturer. It brakes down the surfaces of the abs and fuses it together, creating a bond the gets stronger over several weeks , literally fusing the abs together.

http://www.amazon.com/J-B-Weld-8237-Kwik-Plastic/dp/B003S2E4UE/

Would this stuff work?  I found it on Amazon while looking up 1/8 inch ABS plastic.

Edit: After reading reviews this may be a bad idea.

Do you have any blueprints on the Bazooka or know where to get some?  Where did you get the ABS plastic?  Is there anything local in East Tennessee that sells ABS plastic that may be cheaper than Amazon?  How did you cut the plastic?
« Last Edit: January 29, 2014, 09:41:40 PM by Xaero »

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Re: My completed project... Bazooka build
« Reply #42 on: January 29, 2014, 09:46:05 PM »
It is possible, but what was recommended to me from the manufacturer of the ABS is manufactured by IPS. It is SCI Grip Weld-ON #16. It will weld the ABS as well as work with the PVC pipe caps to the ABS. As expensive as ABS is, Don't skimp on the welding glue. it is only about $10 for a tube... I would not do JB Weld

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Xaero

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Re: My completed project... Bazooka build
« Reply #43 on: January 29, 2014, 10:07:27 PM »
It is possible, but what was recommended to me from the manufacturer of the ABS is manufactured by IPS. It is SCI Grip Weld-ON #16. It will weld the ABS as well as work with the PVC pipe caps to the ABS. As expensive as ABS is, Don't skimp on the welding glue. it is only about $10 for a tube... I would not do JB Weld

RIchard

Blue or red bottle?

Is it this below?

Blue:
http://www.amazon.com/IPS-Weld-On-Acrylic-Plastic-Weld-/dp/B008K7WYLS/

Red:
http://www.amazon.com/Weld-On-Acrylic-Cement-Capacity-Clear/dp/B004AS70UG/

I found a place local that I am asking about sheets of ABS plastic (they show on their website they have 8 foot by 4 foot sheets but no prices).  How did you cut your pieces out?

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Re: My completed project... Bazooka build
« Reply #44 on: January 29, 2014, 10:18:24 PM »
The blue on is it. You can print a speck sheet on it. Gives thr application instrctions ...
Richard
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htmagic

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Re: My completed project... Bazooka build
« Reply #45 on: January 30, 2014, 10:01:32 AM »
Years ago, I use to buy a lot of Lexan and I got mine from SnapVent in Knoxville.
I'm not sure if they sell ABS.

They also sold the solvents, applicators, and glues for Lexan.
They did acrylics and tubes as well.
And they were a fabricator if you did not wish to do it yourself.

It has been years since I visited them but last year I drove by with a friend and noticed their sign on the building is still there so I assume they're still in business...
May the FORCE be with you and have a magical day!

MagicBill

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Re: My completed project... Bazooka build
« Reply #46 on: January 30, 2014, 10:23:49 AM »
they are still doing what they do, I have a customer just behind them and go by there about every other day . There is another place just off jackson st in Lonsdale I used to buy 1/2 and 1 inch pvc in 4x8 sheets. not sure if there still there but I will look when I go thru today. But if you venture into Lonsdale always take your gun, there is a shooting or stabbing almost every week.
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Xaero

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Re: My completed project... Bazooka build
« Reply #47 on: January 31, 2014, 12:58:48 AM »
I just asked Total Plastics in Knoxville.  They sell  48" x 96" 1/8 inch thick black ABS plastic sheets at 49$ a pop.  However they have a 75$ minimum order so anyone would have to buy two.  That is a lot of plastic for a single bazooka project.  I don't know how that price compares to other places but seems reasonable (judging by what rrobinson has said of his project, enough plastic in one sheet for a couple of bazookas).

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Re: My completed project... Bazooka build
« Reply #48 on: January 31, 2014, 06:19:39 AM »
That is a good price for 1/8" abs... Just keep in mid that the manfaturer of the bazooka uses 3/16 " abs. Im not sure 1/8" abs is substantial enough to make the larger prospector models.... I had enough left over from 4 x 8 sheet to make another 36 " prospector and a super mini model...
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Re: My completed project... Bazooka build
« Reply #49 on: February 06, 2014, 01:05:43 AM »
That is a good price for 1/8" abs... Just keep in mid that the manfaturer of the bazooka uses 3/16 " abs. Im not sure 1/8" abs is substantial enough to make the larger prospector models.... I had enough left over from 4 x 8 sheet to make another 36 " prospector and a super mini model...

They sell different thickness sheets.  You used 3/16 too?  The only way I see this working is a group buy but that would involve about 6 or 7 people since that is about how many bazookas (or other crazy design) could be made?  Not including some of us having others make it for a price (I suck at making anything and want a bigger bazooka for me and Shawn lol...).

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Re: My completed project... Bazooka build
« Reply #50 on: February 06, 2014, 06:14:20 AM »
If you want a 48 inch prospector you can get 2 out of 1 4x8 sheet. If you want a larger miner model you can make 1... I am making several for people right now to have at the meeting.. I have not figured a price for the miners models but will be happy to figure one up for you if you want

Richard
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daddydave

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Re: My completed project... Bazooka build
« Reply #51 on: February 06, 2014, 08:27:33 AM »
Haven't used mine yet.  Wondering if the 1/8" holes will get plugged up with sand or (?).  Did put removable caps on the outflow to remove larger objects that may get clogged.  But with the tubes silicone'd in place; it is impossible to unplug them. 
Lookin' for ideas in event this is a problem.

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Re: My completed project... Bazooka build
« Reply #52 on: February 06, 2014, 08:47:23 AM »
I glued the caps to the inside front wall of the fluid chamber, so i can reach inside the water scoop and remove the pipes and the caps stay in place... Just dont glue the pipes into the caps
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Re: My completed project... Bazooka build
« Reply #53 on: February 06, 2014, 11:25:05 AM »
Great idea Rich - easy enough to modify mine, thanks, Dave
Made a flare that can hang on lower intake with couple of hooks so it is detachable.  this way it will self adjust to bottom or rock with another rock holding it down to increase water flow if needed.

eawebb

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Re: My completed project... Bazooka build
« Reply #54 on: February 19, 2014, 01:27:57 PM »
I am interested in one! How much are they?

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Re: My completed project... Bazooka build
« Reply #55 on: February 19, 2014, 02:01:02 PM »
Yeah, I used 3/16" ABS, which is what the real Bazookas are made . I also made some of 1/4 inch polycarnonate. Both worked great. I get a good deal on the poly which is much more expensive than the ABS. I have a number of design changes planed to make it easier to use.  I used it all weekend at Doc Rogers and it worked great... I will be working down my cons this week sometime.

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gene bruce

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Re: My completed project... Bazooka build
« Reply #56 on: February 19, 2014, 07:38:37 PM »
can you build out of aluminan?

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Re: My completed project... Bazooka build
« Reply #57 on: February 19, 2014, 07:53:56 PM »
Yes, I can do aluminum but will have to get you a price on material costs..

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DALEBEC

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Re: My completed project... Bazooka build
« Reply #58 on: February 19, 2014, 08:30:39 PM »
My question is why ABS is lighter very tough, i have had mine for 2+ years and hardly scratched it and i throw it around all the time

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Re: My completed project... Bazooka build
« Reply #59 on: February 19, 2014, 08:49:38 PM »
I agree. I thought about doing aluminum , but it will dent, and ding. The ABS works great. It will definitely take a beating. I spent the better part of 2 days last weekend after the meeting working Dock Rogers with it and we put a lot of material through it, and not a scratch.. Plus it is light. Would hate to have to carry one made of aluminum on a hike, especially if you are going to be carrying any amount of concentrates out...

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Re: My completed project... Bazooka build
« Reply #60 on: February 19, 2014, 09:08:36 PM »
its true abs is lighter @ 1,04 lbs per sq ft for 3/16 but an aluminum one would only need .080 material for the same strength and it weighs 1.12 lbs per sq ft so your looking at about half a pound diff. Don't get me wrong I have thought about building one with abs, I even got my plastic welder out the other day and played with it on some pvc sheet just to see if I could still weld a seam.

Don
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Re: My completed project... Bazooka build
« Reply #61 on: February 19, 2014, 09:19:06 PM »
I am making some and basically covering my cost and time. You have to buy a lot in order to get a price break on ABS or polycarbonate, and both come in 4x8 foot sheets...
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Re: My completed project... Bazooka build
« Reply #62 on: February 19, 2014, 10:30:33 PM »
Not everyone is set up too work with aluminum either so i find the ABS is just fine in my book, dont get me wrong i love working with aluminum too.

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Re: My completed project... Bazooka build
« Reply #63 on: February 19, 2014, 10:49:16 PM »
Oh yeah. I considered Aluminum, but just did not want to deal with the weight for the Bazooka. The ABS was just easier to work with too, and durable.

Richard
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gene bruce

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Re: My completed project... Bazooka build
« Reply #64 on: February 20, 2014, 07:24:58 PM »
all I need some plans I have everything else

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Re: My completed project... Bazooka build
« Reply #65 on: February 20, 2014, 08:38:07 PM »
I will scan my plans to send to you. with measurements. May be the first of the week until I am able to get them to you...

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gene bruce

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Re: My completed project... Bazooka build
« Reply #66 on: February 21, 2014, 06:57:10 PM »
thank you very much.

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Re: My completed project... Bazooka build
« Reply #67 on: February 25, 2014, 05:46:23 PM »
Well, you woulf have to buy way too much ABS to get a price break... It would be way to cost prohibitive...

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gene bruce

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Re: My completed project... Bazooka build
« Reply #68 on: February 25, 2014, 07:06:06 PM »
I have access to metal plastic or abs material.

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Re: My completed project... Bazooka build
« Reply #69 on: February 25, 2014, 07:24:02 PM »
Great, What kind of price can you get on ABS, 3/16"???

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eawebb

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Re: My completed project... Bazooka build
« Reply #70 on: February 28, 2014, 05:25:51 PM »
Got the Bazooka today. Looks great. Can't wait to try it out. I will hit the creek near me Saturday or Sunday to see if there is any color in it.

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Re: My completed project... Bazooka build
« Reply #71 on: February 28, 2014, 09:47:20 PM »
Great, i hope you enjoy it... After you get it set up, and the fluid chamber is full of material, reach your fingers into the end of the fluid chamber and put them down into the material, your fingers should move easily through the material....

Richard
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