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| demilus |
 Posted: 09/25/2006 18:19 PM Post subject: Spark Placement |
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Joined: 09 Apr 2006
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| I'm working on a combustion right now and am using a BBQ ignitor for the spark. The chamber is about 16" x 4" so it is decently sized. Where should the spark be placed (front, back, middle, etc.)? Does where it is placed affect the performance? Thanks |
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| markfh11q |
| Posted: 09/25/2006 18:46 PM Post subject: |
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Magic Dust Man
Joined: 06 May 2006
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It'll work great (best) at the back of the chamber.
Dual sparks work well also, if you want to try that. |
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| Blackspire |
| Posted: 09/25/2006 22:18 PM Post subject: |
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| markfh11q wrote: | It'll work great (best) at the back of the chamber.
Dual sparks work well also, if you want to try that. | How would you recommend doing that with bbq sparkers? |
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| markfh11q |
| Posted: 09/26/2006 4:37 AM Post subject: |
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Magic Dust Man
Joined: 06 May 2006
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| Wire two spark gaps in a series. Just make sure they're not too far apart, (a gap of about 1/16" - 1/8", or they won't spark. |
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| FiveseveN |
| Posted: 09/26/2006 6:12 AM Post subject: |
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Joined: 14 Oct 2005
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| I do believe it has been demonstrated that a spark in the center is the best option with single sparks. If you want dual sparks, put one at 1/3 and the other at 2/3. I don't think a piezo BBQ sparker can handle dual sparks, though. |
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| boilingleadbath |
| Posted: 09/26/2006 15:35 PM Post subject: |
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Joined: 12 Mar 2005
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.23cal, that would be true if the chamber was compleatly closed.
However, it's not - so you get some advantage from putting the spark closer to the rear.
(more air flow towards the barrel, causing more turbulence, which increases burning rate [from the gexcon handbook of gas explosions]) |
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| brumby |
| Posted: 10/06/2006 22:49 PM Post subject: |
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| Ok so ill place my spark about 1/3 at the back |
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