semi-automatic combustion cannon

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
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Hailfire753
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Fri Aug 24, 2007 10:02 pm

geez, give the guy a chance! At least let him get the schematics up before you rip on him! :lol: Then let the carnage begin! :twisted:
UPDATED MARCH '08
field-legal paintball semi
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Pilgrimman
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Fri Aug 24, 2007 10:46 pm

If you want a truly semi-auto combustion, i.e. fires as often as you can pull the trigger, you would need a single switch to complete a circuit for a chamber fan or other venting apparatus, a circuit for electronically controlled fuel metering, and a high voltage sparking device. The changes in voltage between the device would be extreme, so it'd be very difficult to pull off. However, if you can find a way to do it, more power to you!
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jackssmirkingrevenge
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Sat Aug 25, 2007 8:34 pm

geez, give the guy a chance!
Someone with no concept of fuel/air ratios talking about a semi-auto combustion as a first project cannot really expect to be taken seriously :roll:
hectmarr wrote:You have to make many weapons, because this field is long and short life
silverdooty
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Sat Aug 25, 2007 10:15 pm

Pilgrimman wrote:If you want a truly semi-auto combustion, i.e. fires as often as you can pull the trigger, you would need a single switch to complete a circuit for a chamber fan or other venting apparatus, a circuit for electronically controlled fuel metering, and a high voltage sparking device. The changes in voltage between the device would be extreme, so it'd be very difficult to pull off. However, if you can find a way to do it, more power to you!
it's called a relay. most automotive lighting accessory manufacturers use them to control many lights. they can even control more relays. all you would have to do is design each system and then actuate them via one relay switch.

i'm sure if you search through the forums you can find an example of each system, then modify it to your needs.

remember to use these posts as guidelines not gospel. some of the members really do know what they are saying, others are just cavemen who stumble upon fire. :wink:

good luck
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CannonCreator
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Fri Aug 31, 2007 7:34 pm

use the oxygen in the bottle for welding !!!! I did this on a fully auto cannon I made with my uncle and it worked great!
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Redcoat
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Fri Aug 31, 2007 10:48 pm

I think you sould give him a chance though. It would be slack not too.
I think it's possible but like i said earlier i would like tosee the schematics out of interest.
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Tom
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Wed Sep 05, 2007 7:31 am

I gave up, but :D I had the idea last to make combustion cartridge's. Has somewhone on this forum done something like this?, i think that that work if I use a bolt for reloading :idea: .
GR. Tom
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jackssmirkingrevenge
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Wed Sep 05, 2007 7:48 am

Tom wrote:I had the idea last to make combustion cartridge's. Has somewhone on this forum done something like this?, i think that that work if I use a bolt for reloading
Yep, and it looked something like this:

[youtube][/youtube]

The original thread on spudtech is here but most of the pics are dead, though I posted most of them in this thread.
hectmarr wrote:You have to make many weapons, because this field is long and short life
Tom
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Wed Sep 05, 2007 9:35 am

Do you still have the diagram of it?
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jackssmirkingrevenge
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Wed Sep 05, 2007 9:57 am

Tom wrote:Do you still have the diagram of it?
go here
hectmarr wrote:You have to make many weapons, because this field is long and short life
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