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Registered Member #1911
Joined: Mon Jan 05 2009, 06:30PM
Location: Salem, Oregon, USA
Posts: 165
aonomus wrote ...
Thats why I meant more a reinforced metal plate mounted against a cart on wheels, with the coil solidly in place so all the energy goes into acceleration...
Half of the energy would go into acceleration of the work coil, pushing it backwards, along with the cart. Then there's the eddy currents induced in the plate you suggested behind the work coil, which would cause the work coil to -
A: Fly apart, starting in the center or the outer edge, then having less force in the opposite part of the coil because of DC resistance.
B: Fly apart because it goes flying off of the metal plate and gets hammered into the ground at 20'/s
C: Push the cart back, because of its wheels. Possibly pushing the cart over.
It's obvious which is the most desirable. Of course, the other two may be more fun...
Registered Member #179
Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
It'd be rather neat if I could get a *low cost* accelerometer to see what these things are doing in that area...know of any? I've seen Mythbusters use those packing sensors that break...
Registered Member #179
Joined: Thu Feb 16 2006, 02:08AM
Location: Hagerstown, Maryland - Close to Prime Outlets
Posts: 287
Probably nearing a couple hundred...I did have 2 individual failures that required replacement. Closer inspection revealed they were of different contstruction, and therefore, were unmatched to the rest of the bank.
ed: I fully expect the system to slowly self destruct...and I'll run it into the ground. At that time, I'll look for HV pulse caps of similar capacity
Registered Member #2028
Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
I would like to see this coil placed inside a sturdy, low box of half an inch steel plates welded together, just to see what kind of dents it would make. Mechanically bending such thick plates take a lot of force.
banned on 5/26/2009 Registered Member #1877
Joined: Mon Dec 22 2008, 02:03AM
Location:
Posts: 147
OMG wow thats insane, i thought my 5kj bank was huge.. lol. i think you should try making a large rail gun. ov course after your coil gun. but i think both will do VERY well with 24 kilojoules, and mouser sells 44500 amp 8.3ms SCR's, at 600volts. dunno if that helps, i could PM you other sources ,if need be.
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
FastMHz wrote ...
It'd be rather neat if I could get a *low cost* accelerometer to see what these things are doing in that area...know of any? I've seen Mythbusters use those packing sensors that break...
you can buy the actual accelerometers from a place like Spark Fun or you could use a Wii Controller and a Bluetooth connection
my curiosity is if these types of sensors will be affected by the pulse generated without having to use annoying EM shielding... which would likely have to include the power to such sensitive devices...
personally, I use my High Speed Camera for that kind of stuff... but $500 isn't "low cost" for most people... I had to wait years for one.
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Those are called "shockwatch", google it. They have a variety of levels.I have a accelerameter, 3 axis 5G, it is about a 1" square PCB. It uses a I2C interface, if you can do that, i will be happy to point you where you can get one.
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[moved] 24,000j Capacitor Bank (Now Complete)
