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chamber truble

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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chamber truble

Unread postAuthor: chrissilvermancs » Sun Mar 22, 2009 1:35 am

so i have had this piece of 8inch pipe in my possession for a wile but im sure its not pvc its blue stranded got it from a friend who used it as a tunnel for his rabbit. its is like and inch and a forth thick i want to make a combustion out of it but idk what it is or how to put a cap or reducer on it. any ideas for makeshift reducer or cap (im not melting down plastic bags).

also i also have a piece of 6 inch i found randomly in a hardware store that i had but they didnt have any parts for it do you guys know any cheap places to order parts from.
thanks

i will try to get a picture soon

edit: pictures added
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Unread postAuthor: starman » Sun Mar 29, 2009 2:40 am

Yeah that's huge. You can get reducer bushings for this but they are expensive. You're going to have to go to a local commercial pipe supplier or order it from a place like McMaster.

Probably not worth fooling with....

Also, truble = trouble.... :wink:
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Unread postAuthor: c11man » Sun Mar 29, 2009 8:10 am

mcmaster is the MOST over priced place to buy pvc fittings from...

also even sch 80 8inch pvc only has a wall thickness of .500inches so i have noo clue what you have

might be fiber glass
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Unread postAuthor: frankrede » Sun Mar 29, 2009 3:49 pm

I would look for your local irrigation supply store.
Check here for a location near you
ewing1.com
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Unread postAuthor: c11man » Sun Mar 29, 2009 4:32 pm

how would looking for fittings help when he doesnt know what it is made of?

if it is not pvc then a pvc fitting would not work on it...

EDIT: for very cheap pressure rated parts look on www.flexpvc.com all of the parts are pressure rated unless noted. they have ALOT of parts online plus if you cant find the part you need just call them and see if they have it
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Unread postAuthor: chrissilvermancs » Sun Mar 29, 2009 11:55 pm

well if i could get my hands on some sheet pvc and bolt it on but is there any way to test if this hunk of plastic is presser rated

im going to drill through it with a cup bit to make sure that it is full plastic
i will repost when i find out!
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Unread postAuthor: mark.f » Mon Mar 30, 2009 1:43 am

It looks like SDR 13.5 drain pipe. We have some lying around, and Gort made a 12" bore cannon with it as well.

It's not pressure rated, and fittings can get a little pricey.
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Unread postAuthor: jook13 » Mon Mar 30, 2009 2:03 am

I think you mean "a lot pricey". depending on your budget of course.

Reminds me of when I got a big chunk of 6 inch pipe for free. I was all excited and decided to make a bigass cannon out of it. After I was done I realized I spent a couple hundred bucks on fittings and came to realize that the pipe itself would have cost me like 15 bucks. Remember that the fittings will cost WAY more than the pipe itself. It would make more sense financially to scale the pipe down to 4 or 6 inch for the sake of spending less on fittings.
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