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PostPosted: Fri Oct 27, 2006 9:46 pm 
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Joined: Thu Jul 31, 2003 4:45 pm
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Location: USA

BigBang & Crusader


Here is my latest cannon. I call it the Crusader. I started this project a few weeks ago after I disassembled BigBang III. This was an older cannon that I had come to believe was not built to proper safety standards. It was my first propane gun, and I hated to get rid of it – but safety first!

To soothe my misery, I decided to build another bigger, better cannon. Crusader is what I came up with. Here she is...


Crusader & Barrels


The cannon is built from double walled SCH 40 PVC – as usual. The chamber has a nominal volume of 3800 ml, depending on which barrel I’m using. I currently have three interchangable barrels; two of them are breech loading pass-through "spud" barrels made from 1.5" SCH 40 PVC. The longer of the two barrels is 5 feet long (C:B = 1.79), while the shorter is made from 3 feet (C:B = 3.0) of scrap I had in the garage. The short one is going to be a Fourth of July noise maker!!! The third barrel is a five foot long (C:B = 1.67) golfball barrel made from 1.5" SDR-21 sleaved into 2" SCH 80. I plan on building a fourth barrel from 3â€Â


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PostPosted: Fri Oct 27, 2006 10:03 pm 
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Wait... is that just a simple combustion? If so, and if your velocities are in fact true, then that is really amazing! Even though you claim to be sure of the velocities, I am still a bit unsure...

BTW, the pictures do not work when you click on them, and I do not think the videos are working (at least for me...)


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PostPosted: Fri Oct 27, 2006 10:28 pm 
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Ugh! You found this before I got the bugs worked out. I think all the images work now. Still checking on the videos. They worked when I posted them at putfile. But they don't seem to be working for me now. I'll check. Give me a few more minutes.

And yes, this is for a "regular" combustion cannon shooting 1X MAPP. I think the chamber fan and ignition placement combined in an unexpected way to create these results.

I'm sure this will generate much discussion, but I assure you that the results are real. The data don't lie. My interest in what really goes on inside a combustion cannon is really keen now. I think there is much to be learned.

Anyway, back to working on the videos. I'm getting hungry and need a beer.


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PostPosted: Fri Oct 27, 2006 10:48 pm 
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Joined: Tue Jul 29, 2003 9:46 pm
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Location: USA
Coming from anyone else, my BS meter would be pegged by those numbers.

Coming from you, all i can say is HOLY S**T!


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PostPosted: Fri Oct 27, 2006 11:00 pm 
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Very Nice, as always nece paint. That is a little scepticle, the numbers. I think many people bus map but none have ever gotten thoes speeds (correct me if I am wrong). But anyway very nice!


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PostPosted: Fri Oct 27, 2006 11:14 pm 
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$%#^$@!!!!!!!!

Not much more to say. Outstanding construction, excellent post formatting, fantastic results. You "win teh intarwebs!1" :D

quote:

Anyway, back to working on the videos. I'm getting hungry and need a beer.

Cheers! Will Busch Light do? How about an old 40 of OE? You can have em, I'm not going anywhere near em :D

While you're in there, please take the old potato salad with you. I'm not much for leftovers


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PostPosted: Fri Oct 27, 2006 11:34 pm 
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Well, I've fiddled with the videos for as long as I can tonight. I can't get them to show up when I click on the thumbnails. On the other hand, I can't get any videos at PutFile to launch right now. Their site may be down for a while.

I've got a busy weekend this weekend, but will check in if I can and work on the videos (if necessary) as I get a chance. I tried to keep the resolution high enough that you could read the face of the chrony.


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PostPosted: Sat Oct 28, 2006 12:26 am 
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Joined: Tue Jul 29, 2003 9:46 pm
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They work fine for me...


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PostPosted: Sat Oct 28, 2006 2:13 am 
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Joined: Tue Apr 04, 2006 2:05 am
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Holy $%&^. Idid not even know those speeds were possible with a normal combustion. To tell you the truth I thought you were lying about breaking mach 2 on one of those shots, but those videos proved me wrong. Very high quality/high def. videos.

*And yes I know the video was not of the 2000 whatever fps one that broke mach 2 although knowing that the gun is capable of 1600fps I have no doubt in breaking mach 2 with it.

Awesome gun as normal. Also I wanted to point out the very nice post organization/format.

As you could tell above the vids work for me.


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PostPosted: Sat Oct 28, 2006 2:35 am 
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Joined: Tue Feb 01, 2005 12:36 am
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o_O

Holy Sunni (;))! Those are quite the insane measurements, especially with a combustion. I don't think it needs to be stated (restated) that our hats are off to you for this one! Definitely a great work of craftsmanship from you, as always.

Keep rollin em out.


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