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Author Topic: Diagram of clunk tank setup  (Read 3651 times)

Online Paul Taylor

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Diagram of clunk tank setup
« on: June 18, 2016, 07:48:28 AM »
I found a post back in 2006 from John Miller that had a diagram for setting up a clunk tank. My guess is with the few crashes of SH the attachment got lost.  
Anyone have a copy of the file or has a diagram of how the uniflow tube sets in the tank?
Thanks
Paul
« Last Edit: June 18, 2016, 08:40:35 AM by ROOTBEARD »
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Offline Tim Wescott

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Re: Diagram of clunk tank setup
« Reply #1 on: June 18, 2016, 11:06:50 AM »
This is taken out of context, which also takes out a lot of the meaning.  It's "how to plumb a uniflow in a plastic tank".

Basically, you want the uniflow tube to terminate on the wall of the tank to the outside of the circle, about 1/2" away from the pick-up tube.  You want no other way for air to get into the tank, and you want the uniflow tube to be as close to the pickup as can be without the pickup picking up bubbles.

Here's a site with a picture.  The uniflow setup is right at the end -- he gives you one paragraph where I think you need about ten.
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Offline Mark Scarborough

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Re: Diagram of clunk tank setup
« Reply #2 on: June 18, 2016, 11:31:22 AM »
Quote from: ROOTBEARD on June 18, 2016, 07:48:28 AM
I found a post back in 2006 from John Miller that had a diagram for setting up a clunk tank. My guess is with the few crashes of SH the attachment got lost.  
Anyone have a copy of the file or has a diagram of how the uniflow tube sets in the tank?
Thanks
Paul
Email John, he is a member here,,
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Online Paul Taylor

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Re: Diagram of clunk tank setup
« Reply #3 on: June 18, 2016, 04:02:33 PM »
Thanks guys.
Tim the link at the bottom of the page gives a 404 Error. Guess it's MIA.

I have also emailed John.

From the side view in the diagram you posted looks like the uniflow is in the center of the tank?

Thanks
Paul
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Offline Steve Helmick

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Re: Diagram of clunk tank setup
« Reply #4 on: June 18, 2016, 04:25:28 PM »
Nice thing about using a Uniflow Clunk tank with a rigid/fixed Uniflow Tube (U.T.) is that you can move the U.T. instead of moving the tank. The engine only "sees" the end of the U.T. inside the tank. That usually needs to be NOT on centerline of either the engine or spraybar.   D>K Steve
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Offline Tim Wescott

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Re: Diagram of clunk tank setup
« Reply #5 on: June 18, 2016, 05:18:46 PM »
Quote from: ROOTBEARD on June 18, 2016, 04:02:33 PM
Thanks guys.
Tim the link at the bottom of the page gives a 404 Error. Guess it's MIA.

I have also emailed John.

From the side view in the diagram you posted looks like the uniflow is in the center of the tank?

Thanks
Paul

I'll try the link again: http://aeromaniacs.com/Tips.html.  It worked for me just now.

Usually you put the uniflow in the center of the tank, up and down.  But as Steve pointed out, it doesn't have to be.  I have a full-fuse stunter which, because of the tank/venturi setup, needs to have the uniflow close to the bottom of the tank -- which is where it is, and it works just fine there.
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Online Paul Taylor

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Re: Diagram of clunk tank setup
« Reply #6 on: June 18, 2016, 08:19:26 PM »
Thanks guys.
I think I figured it out. Will test it out in a few days.

http://home.cogeco.ca/%7Econtrolline/tip1.shtml

The main tips page works but the link at the bottom for uniflow clunk tanks errors out.
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Offline Tim Wescott

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Re: Diagram of clunk tank setup
« Reply #7 on: June 19, 2016, 10:58:59 AM »
Quote from: ROOTBEARD on June 18, 2016, 08:19:26 PM
Thanks guys.
I think I figured it out. Will test it out in a few days.

http://home.cogeco.ca/%7Econtrolline/tip1.shtml

The main tips page works but the link at the bottom for uniflow clunk tanks errors out.


I didn't even see that link -- I was just pointing to the short uniflow description on the page I linked to.

Not much satisfactory stuff out there...
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Offline Target

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Re: Diagram of clunk tank setup
« Reply #8 on: June 19, 2016, 12:37:51 PM »
This link has a simple diagram of a uniflow tank, not in a plastic tank, but modifying a normal 1oz stunt tank for 1/2A.

http://aeromaniacs.com/public/pdf/Half%20Lite%20Stunter%20Building%20Instructions.pdf
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Online Paul Taylor

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Re: Diagram of clunk tank setup
« Reply #9 on: June 21, 2016, 10:08:23 AM »
Quote from: Tim Wescott on June 18, 2016, 11:06:50 AM
This is taken out of context, which also takes out a lot of the meaning.  It's "how to plumb a uniflow in a plastic tank".

Basically, you want the uniflow tube to terminate on the wall of the tank to the outside of the circle, about 1/2" away from the pick-up tube.  You want no other way for air to get into the tank, and you want the uniflow tube to be as close to the pickup as can be without the pickup picking up bubbles.

Here's a site with a picture.  The uniflow setup is right at the end -- he gives you one paragraph where I think you need about ten.

So with this setup can I also run muffler pressure?
My guess is set pressure on overflow vent???
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Offline Tim Wescott

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Re: Diagram of clunk tank setup
« Reply #10 on: June 21, 2016, 10:34:28 AM »
Quote from: ROOTBEARD on June 21, 2016, 10:08:23 AM
So with this setup can I also run muffler pressure?
My guess is set pressure on overflow vent???

Yes, no.

Yes, you can run muffler pressure.  No, keep the overflow vent blocked and run muffler pressure to the uniflow vent.

Try both -- my current "big" plane got much happier when I disconnected the muffler pressure from the uniflow.  OTOH, I'm running a bunch of smaller planes on the same engine (46LA), which are plain (no uniflow) clunk tanks with muffler pressure.
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