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| kingjames488 |
 Posted: 05/21/2007 9:33 AM Post subject: WTF?? can someone help me out... |
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Specialist
Joined: 19 May 2007
Posts: 45
62.34 Spud Bux
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Hi
I just made my first potato cannon and it doesnt work.
http://www.spudfiles.com/forums/viewtopic,p,88155.html#88155
It worked for a test last night and now it doesnt.
It wasnt sparking reliably at all so I fixed the spark gap and now it has a constant, smaller, spark.
So I spray in some right guard (same thing I used before) and It wont fire.
wtf
I did the exact same thing and It doesnt work??
someone help. |
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| Spuddin |
| Posted: 05/21/2007 9:45 AM Post subject: |
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Donating Member
Joined: 16 May 2007
Posts: 260
664.94 Spud Bux
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hmm , could be a number of things, i had this same problem with my combustion gun. it was usually when i sprayed hairspray in the chamber it got on the tips of the metal rods so then it couldnt spark. i would wipe it off real good and that usually fixed it. after a few shots build up would happen again, just had to keep cleaining it. also it got to where the wires would short across where they were the closest. nice gun btw, i really like the grip.
check out my mortar: http://www.spudfiles.com/forums/mortar-ammo-t8237.html |
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| ShowNoMercy |
| Posted: 05/21/2007 9:47 AM Post subject: |
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Brigadier General
Joined: 19 Mar 2007
Posts: 1112
28.23 Spud Bux
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| I have the solution! Build a pnuematic! You will never have to worry about sparks or spraying in deoderant. |
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| kingjames488 |
| Posted: 05/21/2007 9:47 AM Post subject: |
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Specialist
Joined: 19 May 2007
Posts: 45
62.34 Spud Bux
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but it sparks constantly!!
It take the end cap off and look and its sparking.
Is the spark too small??
its about |-| maybe a bit smaller.
and I like combustion... |
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| ShowNoMercy |
| Posted: 05/21/2007 9:50 AM Post subject: |
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Brigadier General
Joined: 19 Mar 2007
Posts: 1112
28.23 Spud Bux
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| Sorry man I cant really give you much advice, I am pnuematic person myself. Although from what I have gathered, making a propane setup has a lot of benefits that will led to a more consistant approach to it. |
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| kingjames488 |
| Posted: 05/21/2007 9:56 AM Post subject: |
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Specialist
Joined: 19 May 2007
Posts: 45
62.34 Spud Bux
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| if your a pnuematic person then what are you doing in the combustion discussion?? |
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| super spuder |
| Posted: 05/21/2007 10:00 AM Post subject: |
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Colonel
Joined: 06 Apr 2007
Posts: 550
566.68 Spud Bux
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i to am a pneumatic guy, but i have heard the same thing so many times, try spraying less deodorant in, you may have got a little happy with the spray  |
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| ShowNoMercy |
| Posted: 05/21/2007 10:01 AM Post subject: |
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Brigadier General
Joined: 19 Mar 2007
Posts: 1112
28.23 Spud Bux
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Im bored thats why.
And I want to learn more about them, I really wanna build a propane one (gasp i know) |
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| keep_it_real |
| Posted: 05/21/2007 10:23 AM Post subject: |
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Captain
Joined: 23 Dec 2006
Posts: 308
453.06 Spud Bux
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Experiment with different amounts of hairspray. Sounds like you could be using too much.
Try a chamber fan or something to mix the oxygen and hairspray.
Ventilate the chamber after each shot. |
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| -BIGBEAR- |
| Posted: 05/21/2007 10:47 AM Post subject: |
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Private
Joined: 08 Mar 2007
Posts: 22
42.72 Spud Bux
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| sounds like your fuel to air ratio is too in favour of the fuel...like what has been said...test a very small amount and see if you get ignition...keep increasing until you cant get ignition and you will then know in future if you have put too much fuel in....like keep it real said...chamber fan will probably help alot |
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| anixon88 |
| Posted: 05/21/2007 10:51 AM Post subject: |
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Private
Joined: 15 May 2007
Posts: 13
48.61 Spud Bux
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Dont use aerosols that arnt going to burn clean
my suggestion would be to move to something that is a clean hydrocarbon
so you just get CO2 and H20 vapor, not grimy crap to get stuck on your electrodes.
When i made my first combustion, i used a can of butane (like the kind you use for a refillable lighter) and sprayed pure butane into my chamber then capped it and fired
just be careful cause butane comes out in liquid spray in that form, you wont need much at all. |
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| Spuddin |
| Posted: 05/21/2007 11:20 AM Post subject: |
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Donating Member
Joined: 16 May 2007
Posts: 260
664.94 Spud Bux
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| I agree, either too much spray, use only about 2 seconds. or u need to allow more oxygen in the chamber along with your spray, after i shoot mine i open it up and blow a couple times to get the vapors out. |
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| SpudBlaster15 |
| Posted: 05/21/2007 11:23 AM Post subject: |
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Human blast shield
Joined: 18 Oct 2006
Posts: 1539
11.03 Spud Bux
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Since you have found a working air/fuel mixture, this is not the issue, as the 4 people who failed to comprehend the original post suggested.
When using aerosol fuels without a chamber fan, it is often difficult to ignite the air/fuel mixture with a small spark gap, because the mixture tends not to diffuse adequately between the ignition electrodes.
Clean the electrodes, check all connections between the igniter and electrodes for integrity, and set the gap back to it's original position. If you do not get a spark, you are going to have to install a chamber fan, and use a smaller gap. |
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| mega_swordman |
| Posted: 05/21/2007 11:28 AM Post subject: Re: WTF?? can someone help me out... |
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Lieutenant Colonel
Joined: 29 Nov 2006
Posts: 476
811.87 Spud Bux
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Sorry, sorry. I didn't see that Spud. My mistake. 
Last edited by mega_swordman on 05/21/2007 12:40 PM; edited 2 times in total |
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| SpudBlaster15 |
| Posted: 05/21/2007 12:27 PM Post subject: Re: WTF?? can someone help me out... |
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Human blast shield
Joined: 18 Oct 2006
Posts: 1539
11.03 Spud Bux
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| mega_swordman wrote: | | Isn't Right Guard dead? If this is true, then the problem is the fuel isn't combustible. |
Sorry to be so blunt, but can you f*cking read?
| kingjames488 wrote: | It worked for a test last night and now it doesnt.
It wasnt sparking reliably at all so I fixed the spark gap and now it has a constant, smaller, spark.
So I spray in some right guard (same thing I used before) and It wont fire. |
Last edited by SpudBlaster15 on 05/21/2007 12:28 PM; edited 1 time in total |
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