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PostPosted: Fri Oct 27, 2006 4:46 pm
by BigBang
<div align="center"><a href="http://www.spudfiles.com/uploader/uploadFiles/BigBangCrusader.jpg"><img src="http://www.spudfiles.com/uploader/uploadFiles/BigBangCrusaderTMB.jpg"></a>
<b>BigBang & Crusader</b></div>

Here is my latest cannon. I call it the Crusader. I started this project a few weeks ago after I disassembled <a href="http://www.spudfiles.com/forums/viewtopic.php?t=221&">BigBang III</a>. 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...

<div align="center"><a href="http://www.spudfiles.com/uploader/uploadFiles/Crusader.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/CrusaderTMB.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/ChamberOutside.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/ChamberOutsideTMB.jpg"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/PassThruBarrel.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/PassThruBarrelTMB.jpg"></a>
<b>Crusader & Barrels</b></div>

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

PostPosted: Fri Oct 27, 2006 5:03 pm
by Velocity
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...)

PostPosted: Fri Oct 27, 2006 5:28 pm
by BigBang
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.

PostPosted: Fri Oct 27, 2006 5:48 pm
by Freefall
Coming from anyone else, my BS meter would be pegged by those numbers.

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

PostPosted: Fri Oct 27, 2006 6:00 pm
by SpudStuff
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!

PostPosted: Fri Oct 27, 2006 6:14 pm
by Mr.Plow
$%#^$@!!!!!!!!

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

<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">
Anyway, back to working on the videos. I'm getting hungry and need a beer.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Cheers! Will Busch Light do? How about an old 40 of OE? You can have em, I'm not going anywhere near em :D

<font size="-2">While you're in there, please take the old potato salad with you. I'm not much for leftovers</font>

PostPosted: Fri Oct 27, 2006 6:34 pm
by BigBang
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.

PostPosted: Fri Oct 27, 2006 7:26 pm
by Freefall
They work fine for me...

PostPosted: Fri Oct 27, 2006 9:13 pm
by An Apple Pie
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.

PostPosted: Fri Oct 27, 2006 9:35 pm
by draculon
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.