The "Hitchhiker's Guide" to the Maxi-Stream mod
- Thread starter dhnguyen
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coralreefing
Premium Member
I'm going to use the 1.75 Dumas on my mod. I'll make a short mount out of 1.5 PVC, then slide on a 1.5 slip coupling for the shroud. the ID of the slip coupling is 1.91. (same as the 1.5 pipe OD) The OD of the coupling is 2.34 so it's a little bigger than the MJ housing but it should look pretty clean.
Jon770
New member
Does anyone have an extra 'hanger thing' seen below? Unfortunately, I threw out one of my MJ boxes and need one of these for the 2nd mod that I will be making. I dont need the suction cups or anything, just that little hook peice. If anyone has an extra one and would be willing to just throw it in an envelope and send it to me, I would REALLY appreciate. I would be happy to send payment through PayPal to cover costs to ship, or whatever...
RichConley
New member
Anybody selling these? I'm lazy. (PM me)
If not, I'll get out the dremel.
If not, I'll get out the dremel.
coralreefing
Premium Member
It will be a week or so before I have results. I found the pipe & fittings local but I had to order props & shaft.
shelburn61
New member
Can someone clarify all this for me?
What's the benefit of the larger single prop over the double smaller props? Is the 1.75 Dumas the way to go as opposed to two smaller ones?
I'm trying to figure out which prop configuration for a mj 600 and mj1200? (Quiet, flow, size, etc.)
What's the benefit of the larger single prop over the double smaller props? Is the 1.75 Dumas the way to go as opposed to two smaller ones?
I'm trying to figure out which prop configuration for a mj 600 and mj1200? (Quiet, flow, size, etc.)
larger props=larger flow.
without hard numbers 1.75>2x1.25 the second prop only adds a small percentage of extra flow over the first prop. the larger prop has more area to push water rather than 2 props where the 2nd is just catching some of the inefficiency of the first one.
without hard numbers 1.75>2x1.25 the second prop only adds a small percentage of extra flow over the first prop. the larger prop has more area to push water rather than 2 props where the 2nd is just catching some of the inefficiency of the first one.
shelburn61
New member
Will a 600 be able to push the 1.75?
Yes a MJ600 would be fine to push a 1.75" Dumas prop. No problems at all. I wouldn't go any smaller than MJ600 though.
Incidentally I found this site that has some useful information of prop cutting and re-shaping that will also help to maximize performance. Keep in mind this is intended for RC boating but the principles are the same
http://rcboat.com/prop.htm
Incidentally I found this site that has some useful information of prop cutting and re-shaping that will also help to maximize performance. Keep in mind this is intended for RC boating but the principles are the same
http://rcboat.com/prop.htm
Also this this an interesting article on propeller balancing techniques. This was written mostly for metallic propellers but the same can be applied for plastic props I think.
http://members.tripod.com/psfastelectrics6/balancing_props.htm
Also some nice prop charts including diamter and pitch.
http://members.tripod.com/psfastelectrics6/balancing_props.htm
Also some nice prop charts including diamter and pitch.
did you guys know that there is going to be a commercial kit Available ? was at Premium aquatics today and they had one in their SPS tank, said it was going to be about $50 + MJ, said it was for a 1200, but I suspect it would work with the others. Sounds like a good Idea for lazy/unhandy people.
These mods already have a patent pending and will be commercially available in the very near future at approx. $30.00 ea.
The motorized unit is also patent pending.
Questions or comments can directed to Lutz493@zoominternet.net
Thanks,
- Matt
The motorized unit is also patent pending.
Questions or comments can directed to Lutz493@zoominternet.net
Thanks,
- Matt
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