the swirler-stein

[bosborn1]

Man it looks long. I am using 2 inch shrouds with my Octura 2035s....But then again it directs the flow better

 

[hahnmeister]

A longer shroud directs flow better than a short one... like the barrel on a rifle. I just pushed my prop to almost the very end of the shroud to get more of a cone than a beam for the output... so I just have alot of intake area. I was concerned about fish getting sucked in... its got some serious suction due to the octura 2035.

 

[bosborn1]

My Seahare once got stuck to the side of mine...With the possibilty of toxification it scared the heck out of me..

BTW, Sorry i am way OT

 

[kamla]

Great thread guys..

A couple of Questions?

1) How long has this been running in ur tank,. Any issue?
2) Can some point me to the Motor, The old link do not work.


Thanks

 

[kamla]

Hi Guys
how did you guys connect the motor to the disk..
I cannot find a cross thing to put the disk on..

My motor has a cross shaped shaft....

 

[Chad Vossen]

<a href=showthread.php?s=&postid=8999320#post8999320 target=_blank>Originally posted</a> by armagedon48
3 rpm motor

here is the motor i used

 

[Chad Vossen]

<a href=showthread.php?s=&postid=9355972#post9355972 target=_blank>Originally posted</a> by kamla
Hi Guys
how did you guys connect the motor to the disk..
I cannot find a cross thing to put the disk on..

My motor has a cross shaped shaft....

if you look at my photo, i have the same kind of shaft. i simply cut out the cross shape into a piece of acrylic and stuck it on. if you are able to find something that is actually made to go onto this shaft, please include a link, otherwise you will just have to make something.

 

[kamla]

Thax armagedon48
I ordered the same motor..

How long has ur Wave thingie been working..

any thought on how to improve or to make the build easier

Thax again

 

[miwoodar]

I have a motor similar to Hahn's that has been running since early summer 2006. It even spent a half hour submerged in saltwater in October and it's still running like a champ.

This should work...
http://www.surpluscenter.com/item.asp?UID=2007022811570911&item=5-1563-C&catname=electric

 

[miwoodar]

Isayso...this was such a good thread - needs a bump for those who missed it.

 

[GuySmilie]

Yeah, but the pix are gone from the start.

 

[andbigdaddy2]

Yeah new pics i cant tell what you are talking about with out them

 

[miwoodar]

The best pics, and the version I copied, were posted by hmott starting on or just before April 13th of 2006. I just checked. It's page 7 and the pics are still active. He also has the exact parts list I used.

 

[asmodeus]

amazing post, now if I just get some great reefer to help out a army guy before I head over to afghanistan. I want to do one for my tunze 6000

please pretty please.


mike

 

[Siffy]

Anyone done the math/trig on this design/method to predict and control the degrees of swing 2 given radii will produce?

 

[Siffy]

Ok, I think I have this right...

The areas of sweep should be equal shouldn't they? But theta (the angle of sweep) has to be considered twice as during the sweep the arm must return to the initial position with each rotation of the smaller radius (r1, disc/radius on the motor). r2 is the radius of the disc that directly controls the ph movement.

r2 = sqrt(r1^2 * 360 / (2 * theta))

 

[miwoodar]

I just drilled a couple of holes on the arm that attaches to the motor. The buckle can be mounted to any of the holes so I can adjust the swing if I ever need to. Right now I have about 90 degrees of rotation on both of my units.

 

[Siffy]

What are the radii of your arms/discs to get 90 degrees? If you know the measurement. Not worth ripping them open to see. I've got 4 motors to play with and plenty of scrap acrylic to use on my tester. I'm going to get it how I want it then rebuild it and the next ones more cleanly. I went with shallow 2 gang outlet boxes. They already have 1/2" knockouts so the only holes I have to drill are to mount the motor. I'll take some pics of the parts I'm using in a bit.

 

[miwoodar]

Mine look like this...

 

[Siffy]

Mine looks similar but my box is blue ... How is everyone cutting the X or + whichever you want to call it? What are you using to secure the arm? And what is that glued to the end of your PVC pipe?