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Meter for 30ml chamber

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Unread postAuthor: Sticky_Tape » Sat Jan 03, 2009 9:58 pm

Epoxy my friend the whole 1/2'' slip to 3/4'' thread if filled with epoxy the olny thing going into the chamber is a piece of coat hanger wire. The spark jumps to the chamber wall. This way I can adjust the size of the spark gap by un threading the 1/2'' slip by 3/4'' thread bending the coat hanger wire towards the chamber wall or away and threading it back together. EDIT: Thanks starman I waited pretty long to attempt a hybrid almost a year about 27 days until a year.
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Last edited by Sticky_Tape on Sat Jan 03, 2009 10:00 pm, edited 1 time in total.
You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: Gippeto » Sat Jan 03, 2009 10:00 pm

How to you wire in your ignition without it shorting on the walls?


Epoxy perhaps? :)


Edit: Damn! I even refreshed the page to see if anyone had answered. :?
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Unread postAuthor: Sticky_Tape » Sat Jan 03, 2009 10:08 pm

I'm uploading a video on youtube exsplaining it. Anybody know how to use a piezo to ignite a mixhigher than 4x? The spark gap I have now is really small (.75mm) but is doesn't seem to ignite.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: jackssmirkingrevenge » Sun Jan 04, 2009 5:56 am

Lol, did your mum not appreciate you shooting indoors :D

Well done on getting it to work :)
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Unread postAuthor: Sticky_Tape » Sun Jan 04, 2009 11:33 am

She is hollering at me at the end of the video lol you noticed it was just a dryfire. I actually made a huge combustion out of 3'' pipe 5' tall and dry fired it in the house whoooooossh now they think I am going to blow up the house with everything even co2 cartridges lol... not doing that again, I don 't recommend that.[youtube]http://www.youtube.com/watch?v=xgRy7NvFHrQ[/youtube]
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
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Unread postAuthor: Sticky_Tape » Sun Jan 04, 2009 12:36 pm

Well I got a shot off at 8X mix BIG MISTAKE too loud my dad got pissed and now I'm banned from propane oh well back to pneumatics.
EDIT: sorry for the double post I should know by now.
EDIT#2: can anybody tell me the pressure created in a 30ml chamber propane / air at 8X mix I need to know.
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You can tell how awesome a cannon is by the pressure used.
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Unread postAuthor: jimmy101 » Sun Jan 04, 2009 2:05 pm

Sticky_Tape wrote:EDIT#2: can anybody tell me the pressure created in a 30ml chamber propane / air at 8X mix I need to know.

GasEq says 76.3 ATM (1120 psi).

Of course, that'll only happen in an ideal chamber (no heat loss) and without any kind of barrel, ammo or burst disk.
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Unread postAuthor: Sticky_Tape » Sun Jan 04, 2009 2:21 pm

DAYMN that's why it was so loud well I don't think I will be doing that again.
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Unread postAuthor: ALIHISGREAT » Sun Jan 04, 2009 3:03 pm

Sticky_Tape wrote:Well I got a shot off at 8X mix BIG MISTAKE too loud my dad got pissed and now I'm banned from propane oh well back to pneumatics.
EDIT: sorry for the double post I should know by now.
EDIT#2: can anybody tell me the pressure created in a 30ml chamber propane / air at 8X mix I need to know.


LOL FOOL! just apologize to him and ensure him it will never happen again...
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Unread postAuthor: jonnyboy » Sun Jan 04, 2009 3:34 pm

Sticky_Tape wrote:Well I got a shot off at 8X mix BIG MISTAKE too loud my dad got pissed and now I'm banned from propane oh well back to pneumatics.
EDIT: sorry for the double post I should know by now.
EDIT#2: can anybody tell me the pressure created in a 30ml chamber propane / air at 8X mix I need to know.

LOL how about mapp gas?:D

You've made me want to go make a tiny hybrid now.
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mobile chernobyl wrote:I can shoot a Canuter Valve off my '82 Chevy Ram F150 AT LEAST 3/4 Mile with 'ma cannon made of soup cans duct taped together, then I just squirt some bacardi 151 in the chamber and hold up my cigarrete lighta and WHOOSH! That thing flies at least 3/4 mile
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Unread postAuthor: Sticky_Tape » Sun Jan 04, 2009 4:56 pm

They are great but olny use them at lower mixes unless you don't have parrents that think everything will blow up.
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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Unread postAuthor: microman171 » Tue Jan 06, 2009 12:24 am

How do you fill the chamber with gas? Is is under pressure when you put the fuel in? Or do you meter in low pressure propane (with a rich mix) and then pressurise with air?

I got all I need to make one of these :-D. But I'm not sure about metering. I got butane, not propane. I was thinking trial and error (so no real mix number eg. 3.6X).

Anyway, I am going to try this for sure :-D
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Unread postAuthor: starman » Tue Jan 06, 2009 12:54 am

Sticky_Tape wrote:Well I got a shot off at 8X mix BIG MISTAKE too loud my dad got pissed and now I'm banned from propane oh well back to pneumatics.
EDIT: sorry for the double post I should know by now.
EDIT#2: can anybody tell me the pressure created in a 30ml chamber propane / air at 8X mix I need to know.


Oh man that really stinks. Maybe you should sit down with your dad and just go over what you are doing. Promise anything you need to...

Download HGDT and you will be able to get the data you are looking for.
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Unread postAuthor: jon_89 » Tue Jan 06, 2009 1:00 am

So how loud was the 8x mix? I think its time for me to one. I think I have all the parts. what are the dimensions?
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Unread postAuthor: Sticky_Tape » Tue Jan 06, 2009 6:47 am

I don't think that would work starman I can't get it into his head that even a X1 mix with propane will not exsplode. After I fired that bid combustion gun in the house that was pretty stupid but relatively safe he said to me ''you don't even know what you are talking about those people on that site don't know anything about exsplosives! And you sure don't! That thing is going to blow up and put shards into you!'' even though he lets me use 400psi air which is a quite alot more powerful than X1 propane /air mix :roll:
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You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
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