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| brplatz |
 Posted: 04/17/2008 16:44 PM Post subject: New Combution Cannon! |
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Sergeant Major
Joined: 21 Mar 2008
Posts: 178
46.98 Spud Bux
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here is my new cannon. took about 2-3 days and multiple Lowe's runs to get er' done. Paint coming soon. 70"by 2" barrel and about a 20" Chamber. spark strip, chamber fan and Grill ignitor.
Almost done!
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| STHORNE |
| Posted: 04/17/2008 16:46 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1170
500.99 Spud Bux
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| wow, very nice job. damage pics? |
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| starman |
| Posted: 04/17/2008 18:14 PM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1370
2550.30 Spud Bux
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Looks like a powerful cannon you have there...lots of chamber, lots of barrel...metered fueling...nice effort!
You should get yourself back down to Lowe's one more time and pick up some hose clamps to replace that duct tape. Also, it looks like you have forever sealed your spark system and fan inside your chamber with no way to service them if needed. Something to keep in mind for future combustions.
Have you shot the thing yet? |
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| bigbob12345 |
| Posted: 04/17/2008 18:20 PM Post subject: |
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Experienced n00b
Joined: 01 Dec 2007
Posts: 1516
370.57 Spud Bux
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Great job
And cool ball valve, where did you get it |
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| STHORNE |
| Posted: 04/17/2008 18:37 PM Post subject: |
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Master of Spuds
Joined: 14 Feb 2007
Posts: 1170
500.99 Spud Bux
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yeah man...thats about the most unique ball valve i've ever seen (never seen it b4).
I haven't seen them at lowe's, so you got them somewhere else? |
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| brplatz |
| Posted: 04/17/2008 18:52 PM Post subject: |
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Sergeant Major
Joined: 21 Mar 2008
Posts: 178
46.98 Spud Bux
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@starman
thanks i plan to get that duct tape off of there but it was much better that the bulky wood supports i made before. And no i have not been able to get it to fire yet. one calculator said about 85 PSI with my metering system but it didn't ignite. i must have tried it 5-6 times. so i tried another calculator and it gave me 50 psi to put in but i haven't tried it yet.
the ball valve you see there is one i found at Lowes right next to the one like http://img.diytrade.com/cdimg/430486/4037921/0/1185526668.jpg
i had one like that but it was a B!&@% to open and close. so i found this one and it is extremely easier.
COST me $90 bucks to make ugh! most expensive for me yet lol. Where can i get new propane tanks like the one pictured? i found that one in a cabinet in my garage lol |
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| brplatz |
| Posted: 04/17/2008 21:26 PM Post subject: |
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Sergeant Major
Joined: 21 Mar 2008
Posts: 178
46.98 Spud Bux
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anyone have an opinion on the PSI i should inject the propane at that would be great!
thanks
EDIT: forgot about double post sorry |
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| starman |
| Posted: 04/17/2008 21:36 PM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1370
2550.30 Spud Bux
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| brplatz wrote: | anyone have an opinion on the PSI i should inject the propane at that would be great!
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Be sure you are taking into account the volume of your rear elbows as part of the tank volume...all the way around to the potato breech. Also, your meter looks a tad bit smallish for your tank size, just eyeballing it from here...even using 1/2" pipe..maybe not. Check that again. If not you should have to be running a fairly high meter pressure to get the right amount. Check out Pat123's meter calc here:
http://www.spudfiles.com/forums/viewtopic,p,169995.html#169995
ALSO, one ugly thing I just noticed. You've got your propane tank mounted where it will essentially be upside (or tilted downward) most of the time...not good, will tend to liquidize and "flood" your meter plumbing. Turn it around the other way.
Last edited by starman on 04/17/2008 21:57 PM; edited 2 times in total |
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| brplatz |
| Posted: 04/17/2008 21:47 PM Post subject: |
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Sergeant Major
Joined: 21 Mar 2008
Posts: 178
46.98 Spud Bux
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i tried it at 90 psi and nothing. im thinking my spark system is failing. i might have to go get a more powerful ignitor like a stungun and such.
the Propane tank is like that just for the pictures. its usually the other way around.
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| DYI |
| Posted: 04/17/2008 21:48 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2216
1325.97 Spud Bux
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| Just take the 5 minutes and do the meter calculations yourself. It won't kill you, and it might do a lot more good than all these "calculators" people are using. |
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| starman |
| Posted: 04/17/2008 21:51 PM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1370
2550.30 Spud Bux
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| brplatz wrote: | i tried it at 90 psi and nothing. im thinking my spark system is failing. i might have to go get a more powerful ignitor like a stungun and such.
the Propane tank is like that just for the pictures. its usually the other way around.
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OK I get you on the upside down tank...hose is a bit long then. Also check with the calculator I edited into my last post.
Also, you should be able to hear a spark in there...and see one if you open the rear intake valve. Make sure you air it out good first... 
IMO, it's hard to beat a stun gun for advanced combustions... |
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| BlackH |
| Posted: 04/18/2008 1:46 AM Post subject: |
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Specialist
Joined: 01 Feb 2007
Posts: 50
125.22 Spud Bux
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| brplatz |
| Posted: 04/18/2008 7:55 AM Post subject: |
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Sergeant Major
Joined: 21 Mar 2008
Posts: 178
46.98 Spud Bux
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ok burnt latke gave me a Psi of about 53 so ill try that today. i was hitting 90ish on my first attempts. Burnt Latke has some great info and tools!
i make the spark strip like yours but less gaps because its just a regular BBQ lighter. im thinking i dont have enough power to jump the gaps. ill see if i can go find a electronic one or a stungun somewhere also. |
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| stevenarroyo |
| Posted: 08/01/2008 16:08 PM Post subject: |
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Corporal
Joined: 27 Jul 2008
Posts: 77
121.96 Spud Bux
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damn i have to see what that cannon can do!!
show us some more pic's plz |
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