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

[stevenarroyo]

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/cc21 ... G00290.jpg" target="_blank"><img src="http://i217.photobucket.com/albums/cc21 ... G00290.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/cc21 ... G00295.jpg" target="_blank"><img src="http://i217.photobucket.com/albums/cc21 ... G00295.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??

[TurboSuper]

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

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.

[psycix]

Have you read the whole wiki yet?
http://www.spudfiles.com/spud_wiki/inde ... hamber_fan
http://www.spudfiles.com/spud_wiki/inde ... park_strip
http://www.spudfiles.com/spud_wiki/inde ... ichiometry
http://www.spudfiles.com/spud_wiki/inde ... pane_meter
http://www.spudfiles.com/spud_wiki/index.php/Propane
http://www.spudfiles.com/spud_wiki/inde ... plications
The program HCMP: Metering tool for propane, butane, and mapp gas.

[stevenarroyo]

cool

psycix thanks

[stevenarroyo]

new website for all u spud cannons lovers!!! lol

[brogdenlaxmiddie]

new website for all u spud cannons lovers!!! lol

..... What are you talking about?....

[mark.f]

I think he means this one.

[stevenarroyo]

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

thanks

[psycix]

Yes that will work.
Why wouldnt it?