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(edit more questions)new project and i need some help!

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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(edit more questions)new project and i need some help!

Unread postAuthor: stevenarroyo » Mon Sep 22, 2008 4:56 pm

i have make a combustion cannon before, but i want to make this new 1 a little big and better then my last 1. my last 1 was a inline, spray and pray. i want to make is 1 an under/over style with propane.

SPECS
chamber 3inch x 12inch PVC
barrel 1 1/2inch x 3 feet
over / under style
propane metering with chamber fan.

i have some questions i need to be answered if any1 can help me.

i know how to make the meter for the propane i just don't know what size to make it. here is i drawing i have of what i want it to look like.
<a href="http://s217.photobucket.com/albums/cc216/stevenarroyo/?action=view&current=IMG00290.jpg" target="_blank"><img src="http://i217.photobucket.com/albums/cc216/stevenarroyo/IMG00290.jpg" border="0" alt="Photobucket"></a>
if any1 can help me with the size to make it i will be thankful.

i also need to know what size fan i can put inside of my 3inch chamber.
and i don't know if i should use a standard grill igniter or a electric grill igniter? i would also like to make a spark strip, but i don't know how or if it would even work?

that's all the questions for now thanks for reading and helping me.


ok people i have a new question......
am going to use a electric BBQ ignitor and i spark plug. first do you think it can work?? and am planing on having it on the elbow before the barrel.
here is a picture of what an talking about....
<a href="http://s217.photobucket.com/albums/cc216/stevenarroyo/?action=view&current=IMG00295.jpg" target="_blank"><img src="http://i217.photobucket.com/albums/cc216/stevenarroyo/IMG00295.jpg" border="0" alt="Photobucket"></a>
my question for that is do you think it will work there?? if not where can i put it that will not get in the way??
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Last edited by stevenarroyo on Wed Sep 24, 2008 9:03 pm, edited 1 time in total.
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Unread postAuthor: TurboSuper » Mon Sep 22, 2008 5:39 pm

A spark strip can be just any closely placed strips of conductive metal so that multiple sparks arc across them as they travel from anode to cathode. A cheapo one can be made by sticking a CD in the microwave for a couple seconds :D

As for the fan...it can be any size you want really, as long as it fits in the chamber, just depends on what's available. I think 80mm would be too big, that just barely crams into my 4" one.

I prefer electric grill igniters because the "is it sparking?" factor all but dissapears, however a standard piezo sparker is cheaper and performs just as well.
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Unread postAuthor: psycix » Tue Sep 23, 2008 10:38 am

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Unread postAuthor: stevenarroyo » Tue Sep 23, 2008 12:05 pm

cool

psycix thanks
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Unread postAuthor: stevenarroyo » Tue Sep 23, 2008 6:33 pm

new website for all u spud cannons lovers!!! lol
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Unread postAuthor: brogdenlaxmiddie » Tue Sep 23, 2008 8:14 pm

stevenarroyo wrote:new website for all u spud cannons lovers!!! lol


..... What are you talking about?....
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Unread postAuthor: mark.f » Tue Sep 23, 2008 8:49 pm

I think he means this one.
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Unread postAuthor: stevenarroyo » Wed Sep 24, 2008 9:06 pm

i have a new question i edited the info on the top so please read and try to help me

thanks
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Unread postAuthor: psycix » Thu Sep 25, 2008 11:05 am

Yes that will work.
Why wouldnt it?
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