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  #91 (permalink)  
Old July 18, 2008, 02:24 PM
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I may have been hasty about ranting about Dow.Would'nt ya know it , as soon as I rant , I actually find someone who is willing to talk to me....ah well.We'll see what happens.

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I have finally secured 24 feet of 3/4" type L soft copper tubing ;



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This was amazingly difficult to find as well.......Interestingly , I ended up getting it at Rona.Couldn't seem to find it at my usual plumbing shops.

I have secured a 3/4" flare tool , and have my 3/4 flare fittings on order , so my coolant lines are getting closer.

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I have a quick and dirty method of setting up a test pump with the actual copper housing , but it means some machining....I should have some test results this weekend.

I'm reasonably sure it'll work well.If mythbusters can make a pump from an actual outboard motor , I certainly can with a boat prop.

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  #92 (permalink)  
Old July 18, 2008, 09:04 PM
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speaking of mythbusters.....I wouldn't be surprised if BrainEater was Adam lol....except for the Calgary part lol
  #93 (permalink)  
Old July 18, 2008, 09:34 PM
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Haha....nope srry, .

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I have put together a testable prototype of the pump. (!)

My drill presses got a workout today.

I started out with a 5/8" thick piece of MDF.With a 3" and 3 1/4" holesaw , and a 3/8 drillbit , I created two 'endcaps' to fit onto the 3" copper pipe ;



I then cut a 7" section of the 3" copper pipe and drilled (perforated) the bottom couple inches of it ;



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the 2x 3/4" copper output lines come out of the top like so ;




Exploded view :



Assembled view :



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hehe.

I have soaked the 2 MDF endpieces in clearcoat , so the water from the tests won't immediately wreck it.

The prop fits quite closely inside the pipe , 1/8" annulus at most.I think it;ll be fine.

I should be doing some tests tomorrow.

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Old July 18, 2008, 09:50 PM
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The pump looks awesome BrainEater! All those perforations in the bottom really do look great. Now let's se how it works!
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  #95 (permalink)  
Old July 18, 2008, 09:52 PM
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You're good. Really good.
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  #96 (permalink)  
Old July 18, 2008, 10:36 PM
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Thanks guys !

We'll see if it'll do what it needs to tho.I'm sure it'll pump water.

I need it to have enough pressure for 4 feet of lift , pumping syrup.

Once I confirm it works , the MDF endplugs will be replaced with copper/brass analogues.Then I'll test it with iso and dry ice.That'll be the real test.I think it'll work tho.

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  #97 (permalink)  
Old July 18, 2008, 10:48 PM
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Master fabricator!@!111
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  #98 (permalink)  
Old July 18, 2008, 11:26 PM
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dude.. that prop setup looks bad ass. I should swing by tomorror and take a boo in person ;)
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Old July 19, 2008, 07:33 AM
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You have a Steel shaft with a Brass propeller - how will the materials react with such low temps? I'm talking mostly material shrinking here for 2 reasons: make sure the prop shaft hole does not crack and how tight will they be one to the other. Or do you intend to use a mechanical fastener to prevent slipping?
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  #100 (permalink)  
Old July 19, 2008, 07:40 AM
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Heh....

This whole thing is simply amazing!!! Why do I get the feeling that the words "more power Igor!!!" are uttered in your household during REM sleep???? :)
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