Search found 2862 matches

by DYI
Mon Jul 16, 2007 2:38 pm
Forum: General How-To & Discussion
Topic: share your cannon accidents!
Replies: 328
Views: 24658

I know that now...
Lucky it was ABS and not PVC though. I'd have really been screwed then.
by DYI
Mon Jul 16, 2007 2:30 pm
Forum: General How-To & Discussion
Topic: share your cannon accidents!
Replies: 328
Views: 24658

Both of my major spudgun accidents were with an Oxy-MAPP gun that I built a while back, although the first one was pretty minor. The first time, I was down at a lake firing golfballs, and the end plug hadn't been tightened enough (I used it to vent the chamber after firing, the fuel injection was pl...
by DYI
Thu Jul 12, 2007 8:57 pm
Forum: Hybrid Cannons
Topic: Hybrid Questions
Replies: 13
Views: 847

Yes, it was, but the JAUSH was running a 7x mix when that happened. I think that SCH40 barrels are usually fine for hybrids running mixes below 4x, and they have been used succesfully on many PVC hybrids.
by DYI
Thu Jul 12, 2007 4:42 pm
Forum: Hybrid Cannons
Topic: Sam's Hybrid Plans H.V.S-1
Replies: 59
Views: 4257

I know that the pipe is steel, but I had always thought that the fittings were malleable iron (the names malleable or cast IRON are misleading, as they both contain a percentage of carbon. Malleable iron contains significantly less carbon than steel, and cast iron contains quite a bit MORE carbon th...
by DYI
Thu Jul 12, 2007 4:13 pm
Forum: Hybrid Cannons
Topic: Sam's Hybrid Plans H.V.S-1
Replies: 59
Views: 4257

You said that this hybrid will be all steel. Where do you plan on getting steel fittings? They are never sold at any hardware stores where I live. Hardware stores mostly just sell galvanised malleable iron fittings, which are only rated for 150 psi, although they have been used successfully in many ...
by DYI
Wed Jul 11, 2007 9:19 pm
Forum: General How-To & Discussion
Topic: How did you all get into Spudding?
Replies: 58
Views: 1636

I started out in October last year after I had seen a basic combustion cannon demonstrated at Science North. I found some plans for a spray n pray combustion at AdvancedSpuds.com, and built it, and it worked fairly well. It always had ignition problems so, in the spring, I came up with the bright id...
by DYI
Wed Jul 11, 2007 8:55 pm
Forum: Hybrid Cannons
Topic: the JAUSH (in operational stage)[[[[UPDATES 28/3/2008]]]]
Replies: 36
Views: 8502

I think someone on spudtech tried 8x in a plastic hybrid, or at least they claimed to. No one really believed them due to the fact that they were still living though...
by DYI
Tue Jul 10, 2007 12:59 pm
Forum: Hybrid Cannons
Topic: the JAUSH (in operational stage)[[[[UPDATES 28/3/2008]]]]
Replies: 36
Views: 8502

Have you done any damage shots yet? What is the estimated burst pressure of the chamber? What kind of ball valves are you using to separate the meter from the chamber? Most brass ball valves are only rated to 600psi. P.S.- I love how the gauge's needle is bent from the pressure spike. redacted will ...
by DYI
Mon Jul 09, 2007 12:04 pm
Forum: Pneumatic Cannons
Topic: Mini steam gun
Replies: 12
Views: 1072

The shot that I showed a video of wasn't a normal shot, it was the boiler venting. The boiler is the large piece at the back of the gun. The actual chamber is only 1/2"x6", the boiler is only used to fill that chamber. But yes, the barrel should be at least twice as long as it is. The only reason fo...
by DYI
Sun Jul 08, 2007 7:51 pm
Forum: Pneumatic Cannons
Topic: Mini steam gun
Replies: 12
Views: 1072

That "blast" was only at 55 psi, with an almost empty boiler. You should see it at 110.
by DYI
Sun Jul 08, 2007 7:48 pm
Forum: Pneumatic Cannons
Topic: Mini steam gun
Replies: 12
Views: 1072

The temp only goes up to about 300 F, and if the gauge does break, I don't really care, since it only cost $3. A coiled pipe from mcmaster would be the way to protect it, but I've had some bad experiences with them. I've fired multiple times and the gauge is still fine, even though it is not ment fo...
by DYI
Sun Jul 08, 2007 7:04 pm
Forum: Pneumatic Cannons
Topic: Mini steam gun
Replies: 12
Views: 1072

Mini steam gun

This is the miniature version of a MUCH larger steam cannon that I am building, and is my second working pneumatic. I built it to try and determine if it is worth proceding with the big version and have been fairly pleased with the results, although there is only so much power that one can squeeze o...