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My 1st combustion sniper.

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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My 1st combustion sniper.

Unread postAuthor: mdazim » Sun Nov 06, 2011 4:18 am

Hi,this is my first ever built.I made it from a MP5 toy gun.and these are some materials I used.
3' of 1/2" pvc pipe for barrel.
2' of 2" pvc for chamber.
2" to 1/2" pvc reducer.
battery operated kitchen igniter.
1/2" T joint for scope.
laser pointer.
epoxy,black paint & some wire.
By the way I used methanol as fuel and glass marbel as ammo.I just squirts the methanol 7 to 13 times into the chamber from end plug located at the end of the chamber,load the marbel from the barel and shoot.It's a very simple basic design,but look cool I guess.
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Unread postAuthor: pneumaticcannons » Sun Nov 06, 2011 4:23 am

looking good! I like It :)
Have you considered syringe metering? normal metering would ruin the looks.
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Unread postAuthor: mdazim » Sun Nov 06, 2011 7:31 am

pneumaticcannons wrote:looking good! I like It :)
Have you considered syringe metering? normal metering would ruin the looks.

Thanks for liking,actualy this one only experiment for me.I'm working for my 2nd project.I'm planning to built a piston hybrid with metered butane & semi auto bridge loader.
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Unread postAuthor: pneumaticcannons » Sun Nov 06, 2011 7:37 am

wow, thats a big jump! :shock: most people prefer to start with a burst disk hybrid to get a feel of hybrids in general. However, If you feel your up to it, go for it!
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Unread postAuthor: Mr.Tallahassee » Sun Nov 06, 2011 1:07 pm

Word of warning for hybrids, always do preliminary testing behind a heavy shield and, if possible, in the middle of nowhere. Piston's are tricky to get right. Mr.Crowley had issues with his opening too early. Do you have a design in mind? If so can you draw up a sketch?
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Unread postAuthor: mdazim » Wed Nov 09, 2011 12:34 pm

Mr.Tallahassee wrote:Word of warning for hybrids, always do preliminary testing behind a heavy shield and, if possible, in the middle of nowhere. Piston's are tricky to get right. Mr.Crowley had issues with his opening too early. Do you have a design in mind? If so can you draw up a sketch?


Thank you for the advise,this is what I got in mind.Do you think It's gonna work.feel free to comment.
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Unread postAuthor: Mr.Tallahassee » Wed Nov 09, 2011 4:27 pm

That would be very difficult to get right for each shot. I would suggest using a regulated HPA tank and a propane or MAPP tank mounted if it's portability you want. You would definitely need a guage though. Alcohol is really not a suitable fuel for any type of metering.
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