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Weak ignitor = weak blast?

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Weak ignitor = weak blast?

Unread postAuthor: v3ngence » Thu Apr 21, 2005 6:59 pm

Well i discovered sumtin very puzzleing today, i finally got my mix right so I could test differant ignitors. First I tried a BBQ one and the blasts were strangly weak, big yellow flame. Then I tried an electric one and the blasts were some of the biggest since I built my gun. (They were so big the front end cap came off so I redid the solvent and bolted it)

I din't think that the ignitor could affect the blast this much, any insights as to why?
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Unread postAuthor: julz » Thu Apr 21, 2005 7:17 pm

i suppose it could be the oxygen mix. you vented the old fumes right? otherwise i dont know, maybe the spark being smaller means slower combustion and less power.
good luck working it out though.
bye!
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Unread postAuthor: iamthewalrus » Thu Apr 21, 2005 7:30 pm

i think ur right, a stronger spark prolly means a fasted combustion makeing it stronger, just like with pnumatics, the faster the air flow the stronger the shot.
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Unread postAuthor: PCGUY » Thu Apr 21, 2005 8:55 pm

Some of you that know a bit about cars may get where i'm comming from.

Sometimes people replace the spark plugs with ones that make a "bigger" spark, and they may add a box (forgot what it's called) which does something (adds more power, not sure) to the plug to make hotter spark. It's supposed to help you in a car where there is a combustion, so why not a spudgun? :)
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Unread postAuthor: v3ngence » Thu Apr 21, 2005 9:52 pm

Hmm I guess so, still, if this holds true than, theoretically, you could increase performance a lot simply by buying a more powerful ignitor....
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Unread postAuthor: CS » Fri Apr 22, 2005 9:37 am

Ive noticed that about my gun also. I have a flint sparker and a BBQ sparker. When i use a BBQ sparker it shots way farther then when i use a flint sparker. I thought maybe a bigger spark would help ignite the gas faster therefore giving you a bigger explosion with more force. This is one of those things im going to have to try out or it will bug me not knowing if it is true or not.
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Unread postAuthor: iamthewalrus » Fri Apr 22, 2005 2:27 pm

im jstu wondering, what is the strongest igniter?? is it a stungun??
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Unread postAuthor: v3ngence » Fri Apr 22, 2005 5:29 pm

i would assume so, in the category of realistic. I think an arc welder would be the best unless your chamber started to melt...
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Unread postAuthor: theexp » Fri Apr 22, 2005 5:55 pm

WHAT!!! about an arc welder. There are a couple really good strong ones. There is a flyback, a camera flash with ignition coil and a bunch of others.
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Unread postAuthor: v3ngence » Fri Apr 22, 2005 8:17 pm

O yea i dunno if ppl will still read this post but how do u guys get the camera flash ones to spark? 4 me the only way I get anything is to touch the 2 electrodes together, but thats pretty kool when I do lol....
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Unread postAuthor: iamthewalrus » Fri Apr 22, 2005 8:43 pm

i hear a camara has a fary small gap margin and the electrods need to be very close together to work.
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Unread postAuthor: julz » Fri Apr 22, 2005 10:04 pm

there is a tutorial somewhare on spudtech i looked at yesterday. those sparks go about 10mm.
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Unread postAuthor: iamthewalrus » Fri Apr 22, 2005 10:16 pm

then i guess i hurd wrong, sry
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Unread postAuthor: drac » Sun Apr 24, 2005 9:28 am

The size of a spark is no indication of power. Remember, a spark can light a fire just as easily as a propane torch. IT all depends on the oxygen/fuel mix. If it is poor, your ignition will be poor. POwer also depends on the size of your chamber, but I'm assuming that you used the same gun for both.
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Unread postAuthor: p8ntoer » Tue Apr 26, 2005 8:39 pm

he's right. All you need is a tiny amount of electrical spark source, and you could have the biggest explosion ever to be recorded. All you're going to need is the best fuel in the world! Good luck with that!
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