hey is it just me or does it seem like no one is ever in the chat room? does anyone want to set up a certain time(s) to visit it so there is an actual discussion happening? id really like to just chat without spamming up the forums.

what's a

photogate activated transistor

?

has anyone ever bult a coil/rail gun before, and if so do you have any pointers for one made out of a camera flash??? how do i get multiple flashes to fire sequncially??

when you are attatching sprinkler valves, do you need to solvent weld them to the pvc?

i just did the same thing (but for a coil gun instead) i think that it might have something to do with the little copper strip that was attatched to the back of the reflective piece behind the flash. mabye it grounded it. if you follow the line from the strip, it goes through a little electronic thi...

sweet- hoped i'd get to meet dryicex. does anyone know where i can get pvc pipe designed for cold temps? and how 'bout pressure release valves for 120 psi? btw our "super walmart" sells dry ice in the food dept. for about 99 cents.

k- this might sound like a dumb idea but... there was a darwin award (anyone read these?) about a guy who got his "reproductive organs blown off" when he mixed dry ice with hot water in a pop bottle (attempting to make it explode after he had thrown it) so i guess it must have happened pretty fast -...

Has anyone seen this Dry ice cannon ? would this work for spud guns in general?

combustion migt be illeagle in his area- (they actually ticketed my friend for using his, in a residential area) but if i had that much money, i'd spring for the sniper cannon @ http://www.spudfiles.com/forums/viewtopic.php?t=123

i like shooting ice cubes from a mold that fits the barel from my friends spud gun. it's not accurate, but shatters well!

im not sure about this, but i'd think that it would take nowhere near the ammount of air to move the bb the same distance as the potato, at the same speed. so i beleive (correct me if im wrong) that by decreasing the line size to somewhere around 1/4" to 1/8" (or smaller) you could increase the ammo...

my friend's curch uses bike pumps. it takes foreverer but it's portable, and cheap. You might also try a detachable tank, and keep extras in your car etc.

just out of curiosity, which chamber of the extingusher will you be using? would it also be possible to salvage the valve for later use?

Thnk u all 4 your help. i hope to begin working as soon as school gets out. i m planning on using pingpong balls for ammo, (theyr fillable, and fitable into 1.5 pvc.) u r right about filling the stock to prevent a burst. I am going to fill the bottom w/ expanding foam, and cap the top w/ casting res...

There was a great stand a while back @ http://www.spudfiles.com/forums/viewtop ... ight=stand