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#51
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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
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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
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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
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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.
__________________
"If at first, the idea is not absurd, then there is no hope for it" -Al Einstein |
#55
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Tried it
Didn't work as well as a propeller. |
#56
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Treid it too. Spun way slow and didn't move any water.
__________________
Holding it down on the engineering tip y'all |
#57
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dhnguyen
How long has your mod's been running for ? |
#58
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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.
__________________
Eric Meier |
#59
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Quote:
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#60
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nice..... can't wait to mod mine !!
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#61
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Quote:
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#62
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Quote:
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#63
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Quote:
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#64
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sorry for the multiple post...
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#65
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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
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Still want that closed loop Tim?
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#67
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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
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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
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Nice job.
Looks like I'm going to mod my Seio 1100.
__________________
Kevin The early bird may get the worm, but the second mouse gets the cheese. |
#70
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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
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Um ... Flat pieces. do you mean the "stopper(s)"? I'm confused now.
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#72
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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
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#73
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*post for reference*
this stuff is fascinating |
#74
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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
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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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