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/sci/ - Science & Math

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1327844

Anonymous Sat Jul 3 20:18:31 2010 No.1327844 [Reply] [Original]

so /sci/ lets do something useful, let's find out if it's possible to build a practical efficient electrical motor on the Moon from stuff on the Moon for usage on the Moon. Why? Because if we want to build self-replicating robot factories on the moon we're gonna need robots capable of moving.

Things to keep in mind:
-You can only use the elements listed here:
http://www.islandone.org/MMSG/aasm/AASM5E.html#t513
-use them wisely
-Samarium, Cobalt, Nickel, Copper, Neodymium, Carbon, and Bismuth are not on this list
-aluminum is A LOT more abundant than copper on the moon
-basalt is very common on the Moon, it can be spun into thin threads and wrapped around wire to be used as an insulator
-there's no air on the Moon, which means you have to use radiative cooling for your motor
-there's no air on the Moon, which means iron won't rust, sulfur can be used for structural/insulating parts, and molten sodium won't spontaneously explode

>>	Anonymous Sat Jul 3 20:26:31 2010 No.1327864 >>1327844 In what way is the factory self-replicating? Is it in the sense that it creates copies of itself across the Moon? If so, how exactly does that work?

>>	Anonymous Sat Jul 3 20:26:31 2010 No.1327863 >>1327844 Fuck, am I going to have to repost this so it looks like a troll thread to get a response here?

>>

Anonymous Sat Jul 3 20:31:31 2010 No.1327877

>>1327864
It makes copies of itself across the Moon, see more here:
http://www.islandone.org/MMSG/aasm/AASMIndex.html
http://www.mother-of-robots.org/
It makes most of the parts by casting them.
The finer details of doing some of this will hopefully be figured out in this thread.

>>	Anonymous Sat Jul 3 20:38:31 2010 No.1327904 >The finer details of doing some of this will hopefully be figured out in this thread. You must be new here.

>>	Anonymous Sat Jul 3 20:42:31 2010 No.1327922 >>1327877 been loving self replicating robotics since the 90s, but to expect a 4chan discussion to be productive to the greater movement is... unrealistic.

>>	Anonymous Sat Jul 3 20:42:31 2010 No.1327923 >>1327904 No, I'm too old and remember /sci/'s golden age where we actually had meaningful threads.

>>	Anonymous Sat Jul 3 20:43:31 2010 No.1327927 ITT 4chan > NASA

>>	Anonymous Sat Jul 3 20:43:31 2010 No.1327928 >>1327922 did you do work on self-replicating robots in the 90s? If so I think I know who you are.

>>	Scia Sat Jul 3 20:45:31 2010 No.1327936 Hello i am the guy who made a space plan with moon factories. is this a practical technology?

>>	Anonymous Sat Jul 3 20:46:31 2010 No.1327939 Duh, spin the Aluminum into wire, it's almost as good as copper in terms of conductivity. Use the Iron to make magnets. Spin the wire into a coil, run current through it next to the magnets, motor is done. Next!

>>	Anonymous Sat Jul 3 20:47:31 2010 No.1327940 >>1327928 hah no, was in middle school in 95, found a bunch of the clanking replicator stuff then nano stuff, studied robotics in college but haven't been able to apply it anywhere yet.

>>	Anonymous Sat Jul 3 20:48:31 2010 No.1327945 >>1327939 how do you make the effing magnets? You need not spin aluminium into wires in space, you can vacuum deposit it onto wafers and cut it into thin strips.

>>	Anonymous Sat Jul 3 20:54:31 2010 No.1327968 >>1327939 Iron magnets aren't very efficient.

>>	Anonymous Sat Jul 3 20:55:31 2010 No.1327975 >>1327968 >>1327945 Fukken magnets, how do they work? And I don't wanna talk to a scientist, y'all motherfuckers lying and getting me pissed

>>	Anonymous Sat Jul 3 21:05:31 2010 No.1328020 >>1327975 Shut the fuck up.

>>	Anonymous Sat Jul 3 21:05:31 2010 No.1328022 >>1327939 CHALLENGE 2, Make a camera on the Moon with no human help what so ever.

>>	Anonymous Sat Jul 3 21:11:31 2010 No.1328042 >>1327939 Why use Iron for magnets when you have Neodymium?

>>	Anonymous Sat Jul 3 21:12:31 2010 No.1328045 >>1328022 A video camera?

>>	Anonymous Sat Jul 3 21:25:31 2010 No.1328087 I'm sure many of you have seen this already but if you are interested in self-replicating systems check out www.reprap.org, still a long way from full self-replication, but still pretty cool.

>>	Anonymous Sat Jul 3 21:26:31 2010 No.1328092 File: 22 KB, 466x375, two_coil.jpg [View same] [iqdb] [saucenao] [google] FFS /sci/, you don't need magnets to build a motor. This is grade school shit.

>>	Anonymous Sat Jul 3 21:27:31 2010 No.1328096 >>1328092 selonoid=magnet you DOUBLENIGGER

>>	Anonymous Sat Jul 3 21:29:31 2010 No.1328107 >>1328096 >>1328096 l2s

>>	Anonymous Sat Jul 3 21:29:31 2010 No.1328108 >>1328092 >implying that isn't a magnet

>>

Anonymous Sat Jul 3 23:53:31 2010 No.1328669

>>1328042
Because it's hard to get rare earth elements on the Moon. Neodymium magnets allow compact and efficient motors, if one cannot make these on the Moon, then it becomes hard to make self replicating Moon base.

>>1328092
That consumes more power. Also surprisingly no one has suggested an induction motor, which actually seems to fit the bid for a small efficient motor.

>>	Anonymous Sun Jul 4 00:17:31 2010 No.1328749 ITT, nobody thinks about thermal considerations

>>	Anonymous Sun Jul 4 00:24:31 2010 No.1328772 >>1328749 YEP its game over for your shitty motor when the sun goes down and you're ambient temp sinks to 30 K.

>>	Anonymous Sun Jul 4 00:33:31 2010 No.1328799 >>1327844 We don't need all these bones in low gravity. Pull some out, make piezoelectric motors from them. Yes, bones have strong piezoelectric properties.

>>	Anonymous Sun Jul 4 00:44:31 2010 No.1328847 >>1328772 Well shit son, there's a superconductor that works at those temperatures that can be made from elements on the list. http://en.wikipedia.org/wiki/Magnesium_diboride Motor problem solved.