You'd get pretty sparks.
Dyes can't be used with this smoke mix since it burns to hot.
Some working formulas: http://www.pyrocreations.com/smoke_compositions
Search found 113 matches
- Tue May 08, 2007 6:25 am
- Forum: Off-Topic Hobbies
- Topic: Saltpeter!
- Replies: 6
- Views: 1946
- Tue May 08, 2007 6:21 am
- Forum: Off-Topic Hobbies
- Topic: Fireworks, extra effect
- Replies: 41
- Views: 6874
Polyethylene or polypropylene is resistant to gasoline, and can be used as a container. I'd rather use something more volatile though, such as pure gasoline, ethanol or even acetone. That would spread into a fine mist and ignite when the shell explodes, producing a fireball. You'll want the fuel to ...
- Tue May 08, 2007 6:06 am
- Forum: Combustion Cannons
- Topic: new way of using camera for ignition
- Replies: 20
- Views: 6806
It wont shock your hands because your hand has more resistance then the metal thus the electricity just wants to go through the metal contacts equalize... you can hold one of the leads and nothin will happen at this voltage... this is only true with DC. It won't shock you because you're not complet...
- Thu May 03, 2007 4:08 pm
- Forum: Combustion Cannons
- Topic: Can I get a spark on demand?
- Replies: 33
- Views: 8876
The cap will have a voltage rating, I'd guess less than 400V. The actual voltage should be somewhat lower. You can block the gap with a piece of plastic. There is a possibility that the charging circuit is not limited to the rated voltage of the cap, but instead relies on the spark gap doing its job...
- Thu May 03, 2007 1:19 pm
- Forum: Combustion Cannons
- Topic: Can I get a spark on demand?
- Replies: 33
- Views: 8876
The anode goes to the positive end, the cathode to the negative end of the spark gap (you can measure this with a multimeter, or see which end is connected to which pole on the main capacitor). The trigger is operated by either applying a small voltage between the trigger and cathode, or connecting ...
- Thu May 03, 2007 8:14 am
- Forum: Combustion Cannons
- Topic: Can I get a spark on demand?
- Replies: 33
- Views: 8876
Yes, I thought the images themselves were down since my site has been moved, but I see it has been at least partially fixed.
this is the forum thread: http://www.spudfiles.com/spudtech_archi ... hp?t=12401
this is the forum thread: http://www.spudfiles.com/spudtech_archi ... hp?t=12401
- Thu May 03, 2007 6:56 am
- Forum: Combustion Cannons
- Topic: Can I get a spark on demand?
- Replies: 33
- Views: 8876
you can use a SCR (aka thyristor) to precisely trigger a stun gun. One that will handle the voltage across the internal spark gap costs a couple of bucks at the most. It can also be controlled electronically. --- I posted some ideas on spudtech a while ago about self-venting combustion chamber desig...
- Thu Mar 29, 2007 5:04 pm
- Forum: Off-Topic Hobbies
- Topic: which people are from spudtech?
- Replies: 36
- Views: 9752
- Mon Mar 19, 2007 5:38 pm
- Forum: General How-To & Discussion
- Topic: Great How to...working with copper pipe
- Replies: 8
- Views: 7340
Same here, never had a problem with 95/5 (Ag) and a good propane torch. A pipe cutter is very nice for cutting the breech end for a barrel sealer, as it creates a verystraight and even edge. A bonus is that your projectile won't be able to fall onto the valve. Good howto, I've seen the original site...
- Fri Mar 16, 2007 12:29 pm
- Forum: General How-To & Discussion
- Topic: When is spudtech going to be back up?
- Replies: 15
- Views: 3773
You can actually still post in the threads if you have one of the forum views up in your browser from before it closed. The "active topics" page is still up as well (http://forums.spudtech.com/active.asp).
- Wed Nov 29, 2006 5:06 am
- Forum: General How-To & Discussion
- Topic: 3D renderings for sale
- Replies: 28
- Views: 6703
- Fri Nov 24, 2006 7:32 am
- Forum: Ammo & Parts
- Topic: PSI and materials
- Replies: 12
- Views: 4889
Burst pressure depends on the material, thickness, and pipe circumference (and temperature, but that is not relevant when it comes to copper and spudguns). Pressure ratings are very conservative (1/3 to 1/4 of burst pressure). Annealed (soft) copper has much lower ratings than drawn copper. Here are...
- Fri Nov 24, 2006 6:36 am
- Forum: BB, Airsoft, and Pellet Guns
- Topic: Should They Be Banned?
- Replies: 23
- Views: 8781
- Wed Nov 15, 2006 4:50 am
- Forum: General How-To & Discussion
- Topic: 3D Design Software
- Replies: 6
- Views: 1949
- Wed Nov 15, 2006 4:32 am
- Forum: General How-To & Discussion
- Topic: BBQ VS Camera Igniter Effectiveness
- Replies: 1
- Views: 973
I prefer flyback ignition, because you get a constant hot spark. They're more complicated to put together than most other ignition systems though. After that I'd pick camera+ignition coil, becuase it can be made from readily available parts, is pretty simple to put together, and gives a strong spark.