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What do you think of this design?

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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What do you think of this design?

Unread postAuthor: Davedom6766 » Thu Mar 27, 2008 4:19 pm

It is from advancedspuds.com
I built this as my first launcher and it works amazing! i can't find the spuds after launch but i never went to a field

I think that it is probably better than a normal chamber because it would concentrate the force through the reducers. What do you think

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Unread postAuthor: pat123 » Thu Mar 27, 2008 4:41 pm

Most reducers like that are dwv and not pressure rated. It should be ok for a basic combustion though.
I built this as my first launcher and it works amazing!

Post some pics
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Unread postAuthor: Davedom6766 » Thu Mar 27, 2008 4:49 pm

I don't have any pictures right now but will get some

I also meant to say that i had none to but these other kids who's sucked so bad they could use a bat to hit the potato!

THis is what it did to a tree though (pic is half a year after firing)

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Unread postAuthor: psycix » Thu Mar 27, 2008 5:08 pm

I think the performance doesnt change a crap when the chamber gradually reduces like that (with a poabably UN-pressurerated fitting).

Think this way:
If you take out the sloped section and replace it with a straight one (a bushing reducer) your chamber is somewhat closer to the barrel.

But still, it doesnt matter.
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Ok

Unread postAuthor: Davedom6766 » Thu Mar 27, 2008 5:12 pm

OK whatever just a though anyway. do you know if anyone has tested this?
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