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#1 Paintballislife

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Posted 03 August 2004 - 02:45 AM

i tried out that Recrystalization process, didnt come out as well as i hoped, i can pack it, but its not doughy, i think i didnt melt it enough even though i could see anyhting left in the pan, it took almost an hour to get it that carmel brown to where it was hard enough to pack without leavin a residue on me, obviousley it worked. Story goes as follows:

Im a welder and we have stainless tubing about 3/64 thick, very tough stuff, welded a washer to one end and a pipe plug to the other, the tube is about 3/8 OD, so i got the KNO3 propellant ready and started packin, just by hand wanted to see what it owuld do underpressure, seemed to burn about 1 inch per second maybe a little faster. SO i packed for half an hour with a combo of a phillips head and a dowel, unfortunatly the dowel was to big and owuld only go so far, hoping that it would pack the stuff down further. Ended up packin from the burnhole using small grains and a screw that fit through 12# 32 to be exact, so i got it packed as tight as i could, wait BP isnt dry, ok improvise. Made a small trail of mixture near the hole, lit it and took off, now i admit this was stupid, but i was pretty safe on how i had this set up. My mom has these 6" raised beds on 4x4's, i buried that tube up to about an inch from the head, and well below 3 inchs from the top of the wood, in the corner facing me, i had been testing this stuff all night and knew how long i would have. Lit it the match, left the match on top, in turn that lit the half assed fuse i had made, it went off and sounded really good for about a second, then BOOM! im goin, oh s**t it blew up, am i hit, and just walked up to the house to grab a light came back, and i couldnt find it.. im looking around for pieces, nothing then i notice this hole, going staight down at a slight angle.... i dug about a foot down and found the head! I assume that i had air in there and the exaust hole wasnt big enough, i wonder how high that would have gone if i had put that on something.. from now on im making a electronic fuse, or waiting until my cannon fuse comes in and using plenty of it.. i know it was stupid but i would like to hear what u think happen, im suprised it didnt cato, must be a good welder. lol.

Edited by Paintballislife, 03 August 2004 - 02:59 AM.


#2 Guest_Warrenizer_*

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Posted 03 August 2004 - 05:28 AM

you might want to look into using kraft tubes and clay endplugs for your motors. if they cato, or blow at any time, kraft usually doesnt hurt. same goes for mortar tubes. also pvc isnt a good idea either.

#3 RegimentalPyro

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Posted 03 August 2004 - 05:48 AM

This just isn't funny. You need to stop NOW. Take a step back and review just what a danger to yourself & others you became.

Quite apart from the improper fuse [BP trail lit by a match - ferchrissakes!] you were packing a stainless steel tube [Shrapnel anyone?] with a philips head / screw / washer combination. I don't even want to think about the chances of a spark setting off the propellant whilst "ramming"

I am extremely relieved that you were not injured - but to say that this is not the way to do things is beyond an understatement.

You have been warned!

#4 BigG

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Posted 03 August 2004 - 08:29 AM

I have to admit that I?m not sure what the hell you are talking about ? you opened a thread with a meaningless name (something we don?t like here), gave a meaningless description of what look to me like some experimental rocketry ? using a metal casing (which can simply get you expelled from the forum) ? in your back garden, using completely unsuitable ignition method?

To be frank ? I?m not what the hell you are trying to do ? but you better stop it and start reading the forums before killing someone.

P.S. For everyone trying things from Richard?s site ? it must be stressed that what Richard does ? he does in a remote area with a clearance radius of about 250meters from the next house ? using proper electrical ignition ? and I would defiantly won?t try to build his motors without proper precautions ? the references we make to his site from this forum are for people to learn about the candy propellant ? not to build metal motors.

#5 The_Djinn

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Posted 03 August 2004 - 08:42 AM

Paintballislife,

Good welder, great welder... lucky to be alive welder. What you constructed there was not far off a pipe b*mb. If you want to make rocket motors then I would definately sugest you return to cardboard tubes for safety sake.

If you need cardboard tubes, let BigG know as he has some nice ones which I use for rocket motors but I must admit I have not tried them with candy propellant just pure BP mix.

Okay, we have all given you a rap on the knuckles so I guess it is lesson learnt. In future please refrain from the use of metal casings for any device and try post in correct areas of the forum.

Mark
KF Pyro Crew
BPA L1 & L2

#6 Richard H

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Posted 03 August 2004 - 10:17 AM

Oh dear, not got off to a good start have we? :angry:




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