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  #51  
Old 03/08/2006, 11:33 PM
dhnguyen dhnguyen is offline
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1. Try a different glue. I've had good luck with LocTite as well. Worse comes to worse use epoxy. Once epoxy is dried though, nothing will get it off so you better make sure the propeller is where exactly where you want it.


2. Can you see if the propeller is hitting the stopper at all when it's spinning in reverse? If not that would be why it's not correcting its spin. Or could also be that the first problem is leaving your propeller too loose on the rigid tube and when it hits the stopper, it (the propeller) spins around the tube instead of stopping.


D.
  #52  
Old 03/08/2006, 11:51 PM
wax_static wax_static is offline
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Location: Philippines
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hi everybody, i'm from the Philippines. Can't seem to find a hobby shop here that sells the propeller I need. Can anybody here recommend a vendor that can ship in the Philippines?

thanks in advance.
  #53  
Old 03/09/2006, 12:06 AM
dhnguyen dhnguyen is offline
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wax_static

Octura Models - the manufacturer of Octua propellers will ship overseas. Only problem is you have to mail or call them directly as they do not have a website nor email address.

Octura Models Inc
(847) 674-7351
7351 Hamlin Ave
Skokie, IL 60076
USA

You could also try eBay?

Or ask the members in this group where they get theirs from?
http://www.pworld.net.ph/~electro/rc/



D.
  #54  
Old 03/09/2006, 01:22 AM
hahnmeister hahnmeister is offline
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I was thinking about using a PC fan...like an 80mm...any thoughts (besides removing all the metal of course). Might be an easier way to score fans.
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  #55  
Old 03/09/2006, 01:47 AM
dhnguyen dhnguyen is offline
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Tried it

Didn't work as well as a propeller.
  #56  
Old 03/09/2006, 06:52 AM
ChemE ChemE is offline
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Treid it too. Spun way slow and didn't move any water.
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  #57  
Old 03/09/2006, 11:09 AM
jman77 jman77 is offline
See if you can pingaso it
 
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dhnguyen

How long has your mod's been running for ?
  #58  
Old 03/09/2006, 11:22 AM
ejmeier ejmeier is offline
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That reminds me, I saw a plastic paint mixing tool that hooks into your cordless drill that looked like a promising impeller. It is more of a turbine shape like the seios use.



I couldn't find online the one that I saw in person, but that one is close. Just an idea for those that want to use a bigger prop. I believe I saw one that had a 2 5/8" diameter.
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  #59  
Old 03/09/2006, 11:23 AM
dhnguyen dhnguyen is offline
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Quote:
Originally posted by jman77
dhnguyen

How long has your mod's been running for ?
Since July of last year and still running strong. I do clean it once every couple of months or so though.
  #60  
Old 03/09/2006, 11:27 AM
jman77 jman77 is offline
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nice..... can't wait to mod mine !!
  #61  
Old 03/09/2006, 07:02 PM
wax_static wax_static is offline
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Quote:
Originally posted by dhnguyen
wax_static

Octura Models - the manufacturer of Octua propellers will ship overseas. Only problem is you have to mail or call them directly as they do not have a website nor email address.

Octura Models Inc
(847) 674-7351
7351 Hamlin Ave
Skokie, IL 60076
USA

You could also try eBay?

Or ask the members in this group where they get theirs from?
http://www.pworld.net.ph/~electro/rc/



D.
Thanks dh, i've already contacted some of their suppliers, consequently the only one importing this props have no stock. I've also looked into RC plane props, the thing is the smallest prop is 4" long. I was thinking of cutting the prop to get the length i need. Do you think an RC plane prop is ok?
  #62  
Old 03/09/2006, 07:02 PM
wax_static wax_static is offline
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Join Date: Aug 2005
Location: Philippines
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Quote:
Originally posted by dhnguyen
wax_static

Octura Models - the manufacturer of Octua propellers will ship overseas. Only problem is you have to mail or call them directly as they do not have a website nor email address.

Octura Models Inc
(847) 674-7351
7351 Hamlin Ave
Skokie, IL 60076
USA

You could also try eBay?

Or ask the members in this group where they get theirs from?
http://www.pworld.net.ph/~electro/rc/



D.
Thanks dh, i've already contacted some of their suppliers, consequently the only one importing this props have no stock. I've also looked into RC plane props, the thing is the smallest prop is 4" long. I was thinking of cutting the prop to get the length i need. Do you think an RC plane prop is ok?
  #63  
Old 03/09/2006, 07:03 PM
wax_static wax_static is offline
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Join Date: Aug 2005
Location: Philippines
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Quote:
Originally posted by dhnguyen
wax_static

Octura Models - the manufacturer of Octua propellers will ship overseas. Only problem is you have to mail or call them directly as they do not have a website nor email address.

Octura Models Inc
(847) 674-7351
7351 Hamlin Ave
Skokie, IL 60076
USA

You could also try eBay?

Or ask the members in this group where they get theirs from?
http://www.pworld.net.ph/~electro/rc/



D.
Thanks dh, i've already contacted some of their suppliers, consequently the only one importing this props have no stock. I've also looked into RC plane props, the thing is the smallest prop is 4" long. I was thinking of cutting the prop to get the length i need. Do you think an RC plane prop is ok?
  #64  
Old 03/09/2006, 07:07 PM
wax_static wax_static is offline
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sorry for the multiple post...
  #65  
Old 03/09/2006, 09:54 PM
zapata41 zapata41 is offline
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well i modded my seio 820 today, will spin 3 1.75 dumas props but has to be started out of the water. will spin them in reverse underwater, have no stopper on it right now. however, it spins 2 props great. gonna be cleaning it up and putting it in the tank soon. will gets some pics later on tonight, have to go play with it some more. man 3 props moves a lot of water.

Tim
  #66  
Old 03/09/2006, 10:27 PM
dhnguyen dhnguyen is offline
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Still want that closed loop Tim?
  #67  
Old 03/09/2006, 10:52 PM
zapata41 zapata41 is offline
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heck nooooo. i am gonna add a few things to the outlet to reduce the the swirling effect, the seios have it on theirs ( i cut them out once and found out what they did), after these are in this thing will really rock. oh yeah, i got 3 props to start underwater just fine now. this thing easily have 1.5-2x the flow of my seio 2600 that i had. ok well off to glue some stuff and take pics, then time to mount it in the tank.

Tim
  #68  
Old 03/09/2006, 10:54 PM
zapata41 zapata41 is offline
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oh and i have another problem too. i fixed the props to the magnet, so how can i come up with a stopper that will work, since if the prop spins backwards it wont drive itself out to hit a stop since it is connected to the magnet.


ok well here are a few pics, will get some before and after polyp swaying pics later on, but this should keep ya tuned in. here is a parts list too: .125 CF rod, .047x .470 CF flat bar, 3/16 styrene tube, 3 1.75 dumas props, 3x2 DWV reducer, 2 x 1 1/2 slip reducer, seio 820, 4x4x3/16 acrylic sheet,gel superglue, and the a fourth dumas prop hacked up for my coupling.






Tim

Last edited by zapata41; 03/09/2006 at 11:48 PM.
  #69  
Old 03/10/2006, 12:10 AM
want2reef want2reef is offline
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Nice job.

Looks like I'm going to mod my Seio 1100.
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The early bird may get the worm, but the second mouse gets the cheese.
  #70  
Old 03/10/2006, 12:15 AM
zapata41 zapata41 is offline
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should work out good.

i need to work on the flat pieces that go insinde the outlet. they need to be a bit bigger. without them the flow sucks. i tried it in the display tonight, without the flat pieces in and a didnt like it one bit. so back to the drawing board.
the outlet basically needs to look like the outlet of a seio.just cut the flat things off of a seio and run it, thats what it is like

Tim
  #71  
Old 03/10/2006, 12:19 AM
dhnguyen dhnguyen is offline
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Um ... Flat pieces. do you mean the "stopper(s)"? I'm confused now.
  #72  
Old 03/10/2006, 12:48 AM
zapata41 zapata41 is offline
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no not the stoppers. in my last pic you can see them glued inside the outlet.they help to straighten out the flow
  #73  
Old 03/10/2006, 01:02 AM
Perureef Perureef is offline
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*post for reference*

this stuff is fascinating
  #74  
Old 03/10/2006, 01:24 AM
zapata41 zapata41 is offline
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ok well now i have another thought. does two props of the same size move more water than one prop. i mean i really cant tell too much of a difference now when trying out 2 props vs. 3 props and assuming that 1 will feel the same too. so i think i am gonna go get a bigger prop and try this thing over again. looking for a big octura, think that the brand name.

Tim
  #75  
Old 03/10/2006, 02:50 AM
dhnguyen dhnguyen is offline
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It was mentioned once already by someone and also through my own observation, that 1 propeller will not provide you the 100% efficiency from the pitch due to drag, slippage, and resistance - you're getting maybe 80-85% instead. Now 2 propellers will provide better flow because now you have the one propeller feeding off the other and will increase this number to maybe 95%. Consequently adding a thrid propeller won't increase the flow much more than what the intended pitch of the propeller can provide.

This is all just based on my own observation and speculation of course.
 

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