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Building first combustion need advice

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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Building first combustion need advice

Unread postAuthor: colty-bear » Tue Mar 03, 2009 8:02 pm

I want to make a cannon but not just a cannon a breach load cannon i want to open the back with the threaded cap and put in the potato from there can anyone help me?
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Unread postAuthor: brplatz » Tue Mar 03, 2009 8:11 pm

It really isnt to hard. Just do it like they do on Burnt Latke

http://www.burntlatke.com/
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Unread postAuthor: Radiation » Tue Mar 03, 2009 8:13 pm

Ok now you've crossed the line from just honest questions into the realm of handholding type coddling. I gave you the benifit of the doubt with your first post, but now I'm going to agree with mavrick.
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Unread postAuthor: THUNDERLORD » Tue Mar 03, 2009 8:16 pm

It really isnt to hard. Just do it like they do on Burnt Latke...


WTF, like nobody did a breech-loaded spud cOmbustion on SpudFiles???? :?:

@colty-bear, I don't have a lot of time on-line right now, But a sleeve over the barrel would be easier to load than loading through your chamber...I suggest searching in the cOmbustion showcase a while then get an idea. :roll: 8)
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Unread postAuthor: MrCrowley » Tue Mar 03, 2009 10:01 pm

Lack of searching. Topic locked.
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Unread postAuthor: sgort87 » Thu Mar 05, 2009 4:49 pm

We don't have to lock something up just because it's been built or talked about before. Topics get buried and only the people who saw the topic before has a good chance of finding it. Half the time I can't even find something I know existed. Plus, maybe there's more to talk about, keeping some of us on the forum from being bored.

Colty, take a look here at one of Joel's launchers. It's what's known as a coaxial combustion, meaning the barrel runs through the chamber.
Image
Sure, it's a cool concept, but in all practicality, it's gonna suck getting that spud in there while trying to not tear up your knuckles. There's a reason why most people don't make them. Now if you planned to use golf balls or something, that would be a lot better...
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Unread postAuthor: colty-bear » Thu Mar 05, 2009 5:05 pm

omg! thats exactly what i was looking for thank you very very much!! :D :D :D
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Unread postAuthor: THUNDERLORD » Tue Mar 10, 2009 11:50 am

Yeah, if IRC co-axial combustions have very diminished performance.
(Just from research on SF's)

So, what would be the benefit of that?

If you are dying to load through the endcap, it would certainly work better to make the barrel slide rearward (to load co-axial), and back into normal combustion position after loading, By using a barrel sleeve or similar(?):roll:
8)

EDIT: Besides that all the left over spud crap will get into the chamber if you load that way....
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