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troubleshooting a homemade hotplate
your heating element isn't going to last very long.

3.5 amps at what voltage?
verify your power ...
2-7-2010 at 08:47
by: tumadre
High temperature propane decomposition
in a nut shell, water is a terrible heat fluid for Rankine cycle heat engines.

Propane has three ...
19-1-2010 at 08:15
by: tumadre
High temperature propane decomposition
I'm considering building a concentrated solar heat engine, and from Google searches over the past 5 ...
18-1-2010 at 20:37
by: tumadre
Vacuum Bell????
Try using the glass cover from an electric skillet. They tend to be tempered and fairly strong.
17-8-2009 at 17:51
by: tumadre
Unconventional Shaped Charges
I thought this was worth digging up.
shows what a "good" shaped charge/EFP does.

Released on Wik ...
6-10-2008 at 17:51
by: tumadre
Battery Acid Boil.
the crystals are probably EDTA , and other nastyies.
solubility in 36.5% H2SO4 is 3.4g/100mL

EDT ...
31-8-2008 at 06:22
by: tumadre
Inner electrons *might* interact
[quote][i]Originally posted by -jeffB[/i]
If lithium can bond with its inner electrons, forming a n ...
5-8-2008 at 12:15
by: tumadre
Sodium Metal from NaCl Reduction using Lead
Salt will saturate a flower pot and corrode electrical heating elements, so make sure its physically ...
25-7-2008 at 15:53
by: tumadre
Electric motor driven alternators for high amp 6V current..
[quote][i]Originally posted by tentacles[/i]
I've been curious if it's possible to modify one of th ...
23-7-2008 at 12:58
by: tumadre
Electric motor driven alternators for high amp 6V current..
Car alternators are 6 pole, 2:1 off the engine so about 1200-1800 rpm at idle, where most cannot sup ...
22-7-2008 at 18:46
by: tumadre
The lead salts preparation thread!
well the transformer is about the right size:D
17-7-2008 at 12:08
by: tumadre
The lead salts preparation thread!
How much current is that? or do you prefer not to know:D
17-7-2008 at 08:23
by: tumadre
Iron bar bending force (physics question)
[quote][i]Originally posted by math[/i]

However it may not be that simple, as it would be too nic ...
2-7-2008 at 14:19
by: tumadre
DIY Sub Zero C freezer?
If only someone sold a small turbo expander.....
16-6-2008 at 19:43
by: tumadre
Iron bar bending force (physics question)
The material properties matter in this case, because if you notice, the inside edges of a square/rec ...
15-6-2008 at 03:34
by: tumadre
DIY Sub Zero C freezer?
Wow, definitely didn't know it was that expensive where you guys live.

Right now we pay 7.5 pu fo ...
30-5-2008 at 13:44
by: tumadre
DIY Sub Zero C freezer?
misunderstanding... 100 watts at -130C translates into a few kilowatts at 30C

edit: i have no ide ...
29-5-2008 at 19:02
by: tumadre
DIY Sub Zero C freezer?
No small potatoes either. that is about 100 Watts at -130C :D
Not including the interstage losses a ...
29-5-2008 at 18:23
by: tumadre
DIY Sub Zero C freezer?
MJP are you familiar with [url=http://www.refrigeration-engineer.com/forums]http://www.refrigeratio ...
29-5-2008 at 13:22
by: tumadre
Precision micropump
I was thinking about buying a few of these as a future investment, it sounded like a good idea consi ...
24-5-2008 at 15:38
by: tumadre
nuclear powered rock melters for road surfacing
well, you still need a 2000F radiator
I don't believe most reactors can operate that hot, so you wo ...
19-5-2008 at 15:05
by: tumadre
Poll: What is YOUR level of education??
Aside from an excellent AP physics class in High school I have learned everything from hands on expe ...
18-5-2008 at 17:25
by: tumadre
Extracting lead from car batteries
>5 ppm extractable lead relegates dirt as hazardous waste (per the TCLP).

funny, the concentr ...
16-5-2008 at 21:24
by: tumadre
Extracting lead from car batteries
OMG *thinking back to my childhood lead experiences...

Alright. band saw, if you have one, or an ...
16-5-2008 at 14:22
by: tumadre
What’s the average age?
I feel you MJP, from the are of 18 to almost 20 it seems like the time just disappeared.

I've alw ...
6-5-2008 at 15:26
by: tumadre
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