"Rebel Yell" Update 2: Destruction

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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biggsauce
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Sun May 04, 2008 12:37 am

Well heres my first "advanced" combustion. I had the chamber and "tanks" since last summer and never got around to really starting it. Since me and the ole lady split about a month ago, I've had the time to play. :)

Some specs:

Chamber:
Comprised of 4 4" couplers, 4" cleanout adapter, 3x4" bushing, and 3" female adapter. (plus the various sections of pipe to slap it together) In HGDT, I enter the length as 14.4. It uses 3" bajo couplings to enable breach loading.

Barrel(s)
As of now, I have a 2.5"x48" barrel (C:B .8 ) which should be pretty fun with tennis balls. When the judge finished my 2" rifled barrel, I'll make it 72" (C:B .8 ) which should be pretty nasy with taters

Fueling/Ignition
As of now, I'm using propane. When this tank runs out, I'll switch to MAPP. My meter is 12" of 1/2" and I'm running 45psi. I have two gaps with the bbq ignitor, which is sexily tucked away in the 3/4" handle (notice the cut away coupler for somewhat of a safety. I currently have a single fan running of 18v, but I'll be adding a second smaller fan in the center of the chamber to hopefully induce turbulence.

Misc.
The "tank" with the switch holds spare batteries, and a tennis ball. Kinda cool. All my pipe clamps are sleeved in black vinyl hose. Very sexy. All thats left to do is get the clamps even. grrr...

When I finished up the meter, it was all systems go. My dad wanted to see this thing work. I stuffed a rag in the barrel, charged my chmaber, and clicked the ignitor. :shock: What? What did I do wrong? My dad suggested that the meter needed to be bled of air first. Oh yeah. Anyway, got it fuled up, click, BOOM. "Holy [poo]!" Wasn't expecting it to be that loud. It shot the rag a healthy 20yrds and stirred up my neighbors, who were, by that point on a friday afternoon, three sheets to the wind and came over laughing.

Also pictured below are some old projects and "The Enforcer" which has been used for a few parts including the barrel.

Anyway, Rebel Yell is almost done with the exeption of the rebel flag stickers I'm waiting on, and to get the clmps even. Hopefully next weekend I'll get some damage pictures/videos.

Whatchyall think?
Attachments
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04-19-08_2307.jpg
05-02-08_1614.jpg
DSCF3303.JPG
DSCF3304.JPG
DSCF3305.JPG
DSCF3306.JPG
DSCF3307.JPG
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my regulator setup
my regulator setup
Some old projects...
Some old projects...
Make a nice christmas card eh?
Make a nice christmas card eh?
Last edited by biggsauce on Fri Jun 27, 2008 10:48 pm, edited 3 times in total.
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MrCrowley
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Sun May 04, 2008 1:06 am

Wow very nice and very clean. Looking forward to more cannons from you :)
THUNDERLORD
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Sun May 04, 2008 1:22 am

I rate it two thumbs up and a Rebel Yell, WoooooooHooo Yeaaah!!!

I really like the Intimidator also, but your work is impressive, like always.

(In case some are wondering what a Rebel yell is it happens to be the sound of courage, bravery and love of country).
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Lentamentalisk
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Sun May 04, 2008 1:27 am

F\/<king beautiful! Great job!
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TwitchTheAussie
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Sun May 04, 2008 1:35 am

Bloody Beasty mate :thumbright:
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BigGrib
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Sun May 04, 2008 2:46 am

Holy Hell Yeah!!! Very nice work.
Yea, that's definitely going to get you at least a tazer.
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potatoflinger
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Sun May 04, 2008 7:11 am

That looks awesome, especially with the paint job, nice one!
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jrrdw
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Sun May 04, 2008 7:33 am

Question -- Why use 4, 4" couplers instead of one solid piece of pipe? I agree with all the above, looks great! Intimidating for sure. :wink:
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biggsauce
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Sun May 04, 2008 8:33 am

jrrdw wrote:Question -- Why use 4, 4" couplers instead of one solid piece of pipe? I agree with all the above, looks great! Intimidating for sure. :wink:
When I put the chamber together (almost a year ago) I wasn't sure where I would drill through for a meter, spark, fan etc, and this offers as much double layer options as possible. Plus I think it looks good 8)
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JDP12
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Sun May 04, 2008 9:25 am

thats one of the nicest combustions i've seen on here for a long time. So clean, and i love the forward handle nice job there!
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bigbob12345
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Sun May 04, 2008 9:27 am

Wonderful job
Guess what Im gouing to go as far as naming it my favorite combustion on this site. :)
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starman
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Sun May 04, 2008 9:39 am

I love this thing man, being a big bore combustion man myself :) Good attention to details and a great paint job. Believe it or not, just about the same direction I'm going on my next advanced combustion with the electrical guts of the thing stuffed into some PVC pipe...You beat me to the punch my friend.

That 3" camlock really adds an extra beefy look to it. Beware shooting real ammo with this, cans of veggies, etc. as recoil will be significant. I assume that's a tennis ball barrel there...won't be as bad.

My only other thoughts are to add another gap in the center of the spark strip...a few more percentage points of performance....maybe add some official looking stencils...

Awesome gun!

Edit: Oh and maybe shorten your propane hose a tad.
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biggsauce
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Sun May 04, 2008 4:24 pm

starman wrote:I love this thing man, being a big bore combustion man myself :) Good attention to details and a great paint job. Believe it or not, just about the same direction I'm going on my next advanced combustion with the electrical guts of the thing stuffed into some PVC pipe...You beat me to the punch my friend.

That 3" camlock really adds an extra beefy look to it. Beware shooting real ammo with this, cans of veggies, etc. as recoil will be significant. I assume that's a tennis ball barrel there...won't be as bad.

My only other thoughts are to add another gap in the center of the spark strip...a few more percentage points of performance....maybe add some official looking stencils...

Awesome gun!

Edit: Oh and maybe shorten your propane hose a tad.
Thanks for the compliments, im pretty proud of it. I had thought about redoing my spark strip with 3 sparks when I add the other chamber fan, but it may be a few weeks. The hose is long... yeah :D I kinda eyeballed it at first, then decided I liked the look, then decided that I'll add a 45 elbow to the male quick connect and shorten it. But for the time being, I like it. Also, I'm waiting for some rebel flag stickers to come in and that'll dress it up quite a bit. I'd also like to make some warning stickers, but I gots to figure out power point...

And thanks for warning with projectiles, I'm sure it'll be pretty hefty 8)
thats one of the nicest combustions i've seen on here for a long time. So clean, and i love the forward handle nice job there!
Thanks, the forward grip really makes it nicer to hold and adds some cool points :D
Wonderful job
Guess what Im gouing to go as far as naming it my favorite combustion on this site.
You make me blush :oops:

Thanks to all for the compliments. Any questions, just ask
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mark.f
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Sun May 04, 2008 4:26 pm

Looks good! I would also add another gap to the center. More burn time in spherical mode baby!

I was actually fixing to get some 3" cam-locks for my next cannon. It's easier to breech load (largest size that will pass through a 2" cam-lock is 1-1/4" pipe). Can a 2-1/2" pipe pass though a 3" cam-lock?
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elitesniper
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Sun May 04, 2008 4:27 pm

Wow I think this is my new favorite cannon :shock: Great job concealing everything, all you need is a ball valve vent :)
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