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Old Nov 02, 2008, 04:08 AM
NeverAgainVolunteerYourse lf
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Australia, QLD, Regents Park
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Nexus Tide 2.5 times bigger, was Want to use up some 24 volt stuff in a Boat

Ok fishing for ideas, I have a multitude of 24 volt motors and a 24 volt water pump, I want to put it in a boat, It has to be a simple design, semi scale (Im not a "detail" person ) I have a 24 volt 30 amp Electronize speed control. I really want to use the water pump, its high pressure 30 +psi, squirts across my yard.
I thought along the lines of a 3x Springer but isn't quite what I'm after shape wise.
Regards
Nick
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Last edited by nick_75au; Nov 13, 2008 at 02:58 AM. Reason: Changing title of thread
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Old Nov 02, 2008, 09:39 AM
no wings any more, just dust!
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stoke on trent
Joined Oct 2004
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sounds like a good plan, though a square-cut bottom springer sounds a good idea
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Old Nov 02, 2008, 11:03 AM
Grumpa Tom
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United States, CA, Los Angeles
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Just curious, but why so much 24V stuff? What was it used in?
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Old Nov 02, 2008, 11:24 PM
NeverAgainVolunteerYourse lf
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Australia, QLD, Regents Park
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Hi ,
If it is Springer definitely the cut-off version
All motors and pumps out of full sized boats, 24 volts is more efficient than 12 volts.
Im thinking Offshore supply/ research vessel, springerised
Nick
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Old Nov 03, 2008, 09:30 AM
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McAlester
Joined Nov 2004
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The biggest problem would be reducing the supply voltage to something those servos and receiver could use. Certainly not impossible by any means, but also not exactly efficient in several ways. First thought it two power supplies/batteries. One for the motor (any usable voltage), and one for the control stuff (6 volts?). No idea what that would do to the required size/weight capacity of the boat.
- 'Doc
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Old Nov 03, 2008, 09:38 AM
Veni, Vidi, Feci
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No biggie on the power supply... many single-component regulators are available that can drop 24v to 5v, with capacities of 0.5A and on up. Might want a heat sink though!
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Old Nov 03, 2008, 11:03 AM
Registered User
Blackpool, Lancs
Joined Feb 2006
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Quote:
Originally Posted by patmat2350
No biggie on the power supply... many single-component regulators are available that can drop 24v to 5v, with capacities of 0.5A and on up. Might want a heat sink though!
There must be a way of using the heat generated for something useful.
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Old Nov 03, 2008, 11:14 AM
Veni, Vidi, Feci
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A real (miniature) coffee pot on the bridge?
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Old Nov 03, 2008, 11:30 AM
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Toronto, Canada
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A mini Stirling engine powered fan.
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Old Nov 03, 2008, 01:33 PM
3 Blades to the Wind
Shaun Hendricks's Avatar
Atascadero, California, United States
Joined Oct 2004
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If you're using 2-4 batteries to drive the 24v, just pull the lower voltage off an earlier battery. Radios and such don't pull enough juice to worry about the drain.

4 x 6v Lead Acid cells would let you run 6,12,18 and 24v items right off the battery taps. You just have to be certain the circuits don't share common components or power bus runs.

Springer or large tug/warship would be easy to do. A super-fireboat might be fun!
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Old Nov 03, 2008, 05:51 PM
NeverAgainVolunteerYourse lf
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Hi Guys,

Interesting, the coffee pot would be great but there's no way it would keep up with my consumption
On the power for servos etc Im just going to use a separate battery,

Any Ideas for a relatively simple tug warship or fireboat hull? other than Springer? Its going to have to be fairly large, the motors are about 6 inches long and 3 inches diameter, plus a couple of big gel cells.

I've also got a couple of marine electronics items to put in, like a depth module that can output serial data. When I find out how to transmit that wireless, I will use a laptop to record it.
Nick
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Old Nov 04, 2008, 10:44 AM
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Marlborough, Massachussetts, United States
Joined May 2002
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Use a plan from a full-size boat?

There are lots of free plans on the net for row boats in various shapes and sizes. If you take one of those plans and divide all the measurements by 4, you'll have a nice hull that has been proven to be stable. That should give you a good place to start.
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Old Nov 04, 2008, 11:50 PM
RELAX. You'll live longer
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Brisbane- Australia
Joined Jul 2007
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Hi Nick.
I've got a few plans & articles in old MMI & Model Boats magazines you can borrow if you're coming up on Saturday for our Open Day & swap/sale meet.
'Nexus Tide' comes to mind. It's an oil rig support vessel. There are also tugs & customs launches, workboats etc. If you double or triple the size of the plans, add a few extra bulkheads, & work your magic with some extra detail I think you'll be well pleased. Some are simple construction designs. others are true scale. Then again, you may already have them.
Cheers.
Paul.
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Old Nov 06, 2008, 12:21 AM
NeverAgainVolunteerYourse lf
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Looks like Nexus tide will be the go, thanks Paul, see you on Saturday.
Nick
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Old Nov 11, 2008, 08:01 AM
NeverAgainVolunteerYourse lf
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Started the build , bottom, stem, fwd deck cut out and assembled, tommorow will be the aft deck, stern etc then hull sheeting by the weekend. So far cost has been nil. It will be a little over 1500 mm long, 300 mm wide. 2.5 times the plans. theres enough room betwen the two bulkheads for 2, 24 Ah batteries and the two big motors. the bow has enough room for every bit of electronics I can think of. Including a laptop I think.
Nick
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