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Neongreen · 09-28-2006, 05:56 PM

This is modelled after the human heart.

You have two magnets on either side of the pipe(Which must be able to be compressed). One stays at one polarity(Postive, for example), and the other flips between positive and negative.

In theory, this should cause a rapid slamming and release motion. It will require a battery to flip the charge. The pump chamber would NOT be able to hold more than 20mL's, but it would be able to pump several times a second I'd imagine.

Silence · 09-28-2006, 06:48 PM

Well yes, in theory, this would work as a pump. But it's overly complex and inefficient, very much like the terrible internal combustion engine, simply because you're trying to move a piston one way and then immediately change directions. Ugh. Talk about inefficiency!

I don't know exactly how other pumps would operate, but I imagine they'd use a motor and a turbine somehow. That would make far more sense, even if it wouldn't create such a tight seal.

Neongreen · 09-28-2006, 06:59 PM

Actually, I think this would be quite effecient, because:

The battery itself ISN'T moving the magnets. It's reversing the polarity, so the magnets themselves are repelling. I do not know much about electromagnets, so if someone more informed thinks otherwise, please speak out.

Additionally, the magnets come to a complete halt before reversing direction.

Ben · 09-28-2006, 09:22 PM

If it has to start and stop again, that's the source of the inefficiency.

There's better electric-pumps anyway. A high-torque electric motor would be not only more efficient, but easier to make.

Silence · 09-28-2006, 11:12 PM

Let me put it this way, if Ben's explanation didn't work either. You use up a lot of energy to get the piston or whatever moving. Now, on a turbine, it keeps on moving in the same direction, so little energy is required after that. But with the pump, you take as much energy to start as you do to stop the piston; and then you have to do it all over again going in the other direction!

joannaardway · 09-30-2006, 08:49 AM

Electromagnets eat batteries, and don't give much power in return.

Sure, magnetism is very powerful relative to other forces (say, gravity - thus, why a magnet weighing a few ounces can defeat the pull of the entire earth).

But generating it like that is seriously inefficent.

The best battery powered pump I ever saw was cannibalised from a cordless drill and a few other things. It pumped some ridiculous amount of water at notably high pressures.

Neongreen · 09-30-2006, 12:18 PM

Ahh, thanks for that. Makes a tad more sense now

Silence · 09-30-2006, 01:09 PM

Don't let that discourage you, though. If you had plans for an electric water gun, it's still easily feasible--only better! For example, the Scorpion, an commercial battery-powered gun, could have a homemade variant with a quieter/more powerful motor, a better PC, more nozzles, and a larger battery. All of which are possible.

Neongreen · 09-30-2006, 01:42 PM

Heck, an electric water gun? I've still got to make the RangeBoost I and II prototypes, going to be a loong time before I even consider anything else. :P

On the other hand, I'm goin to enjoy having a sniper rifle

Especially in the 1HK games.

09-28-2006, 05:56 PM	#1
Neongreen Member Join Date: Sep 2005 Posts: 33 UserID: 483	Electromagnetic Pump This is modelled after the human heart. You have two magnets on either side of the pipe(Which must be able to be compressed). One stays at one polarity(Postive, for example), and the other flips between positive and negative. In theory, this should cause a rapid slamming and release motion. It will require a battery to flip the charge. The pump chamber would NOT be able to hold more than 20mL's, but it would be able to pump several times a second I'd imagine.

09-28-2006, 06:48 PM	#2
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,293 UserID: 576	Well yes, in theory, this would work as a pump. But it's overly complex and inefficient, very much like the terrible internal combustion engine, simply because you're trying to move a piston one way and then immediately change directions. Ugh. Talk about inefficiency! I don't know exactly how other pumps would operate, but I imagine they'd use a motor and a turbine somehow. That would make far more sense, even if it wouldn't create such a tight seal. __________________ Forum rules

09-28-2006, 09:22 PM	#4
Ben Founder Join Date: Mar 2003 Location: College Park, Maryland Posts: 6,054 UserID: 1	If it has to start and stop again, that's the source of the inefficiency. There's better electric-pumps anyway. A high-torque electric motor would be not only more efficient, but easier to make. __________________ email: / Forum rules / Read this page before emailing me. Do not send me a PM or email with a water gun question if someone else could answer the question. Post at the forums. You will get a response from me along with others' views or ideas.

09-28-2006, 11:12 PM	#5
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,293 UserID: 576	Let me put it this way, if Ben's explanation didn't work either. You use up a lot of energy to get the piston or whatever moving. Now, on a turbine, it keeps on moving in the same direction, so little energy is required after that. But with the pump, you take as much energy to start as you do to stop the piston; and then you have to do it all over again going in the other direction! __________________ Forum rules

09-30-2006, 08:49 AM	#6
joannaardway Do not adjust your TV set Join Date: Feb 2006 Location: SW Hertfordshire, England Posts: 875 UserID: 549	Electromagnets eat batteries, and don't give much power in return. Sure, magnetism is very powerful relative to other forces (say, gravity - thus, why a magnet weighing a few ounces can defeat the pull of the entire earth). But generating it like that is seriously inefficent. The best battery powered pump I ever saw was cannibalised from a cordless drill and a few other things. It pumped some ridiculous amount of water at notably high pressures. __________________ "Over the hills and far away, she prays he will return one day. As sure as the rivers reach the seas, back in his arms again she'll be." - Over the Hills and far away, Gary Moore "So many people have come and gone, their faces fade as the years go by. Yet I still recall as I wander on, as clear as the sun in the summer sky" - More than a feeling, Boston

09-28-2006, 06:59 PM	#3
Neongreen Member Join Date: Sep 2005 Posts: 33 UserID: 483	Actually, I think this would be quite effecient, because: The battery itself ISN'T moving the magnets. It's reversing the polarity, so the magnets themselves are repelling. I do not know much about electromagnets, so if someone more informed thinks otherwise, please speak out. Additionally, the magnets come to a complete halt before reversing direction.

09-30-2006, 12:18 PM	#7
Neongreen Member Join Date: Sep 2005 Posts: 33 UserID: 483	Ahh, thanks for that. Makes a tad more sense now

09-30-2006, 01:09 PM	#8
Silence Administrator Join Date: Apr 2006 Location: Virginia Posts: 3,293 UserID: 576	Don't let that discourage you, though. If you had plans for an electric water gun, it's still easily feasible--only better! For example, the Scorpion, an commercial battery-powered gun, could have a homemade variant with a quieter/more powerful motor, a better PC, more nozzles, and a larger battery. All of which are possible. __________________ Forum rules

09-30-2006, 01:42 PM	#9
Neongreen Member Join Date: Sep 2005 Posts: 33 UserID: 483	Heck, an electric water gun? I've still got to make the RangeBoost I and II prototypes, going to be a loong time before I even consider anything else. :P On the other hand, I'm goin to enjoy having a sniper rifle Especially in the 1HK games.

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