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camping explosion...

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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Unread postAuthor: Flying_Salt » Sat Jun 30, 2007 12:28 am

SpudBlaster15 wrote:
Scotty wrote:Metal will always be stronger than Plastic.

If you looked around this site, you would see that numerous others have constructed cannons using materials far less safe than what spudthug used, and gotten away with it.


Maybe now is a good time to bring up my ever famous tissue box combustion and my paper mache cannon? :D

EDIT: Here is the tissue box one

And I'm sorry about you getting burned and such. It kinda sucks in a major way. Now does your dad walk around with an "I told you so" attitude? I know I would :lol:
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Unread postAuthor: SpudBlaster15 » Sat Jun 30, 2007 12:41 am

Scotty wrote:Metal will always be stronger than Plastic.


Ultimate tensile strengths:

A514 high strength alloy steel: 110,000psi
Class 12.9 alloy steel (hardened): 180,000psi
6Al 4V titanium alloy: 130,000psi
Tungsten: 220,000psi
T6 7075 aircraft grade aluminum alloy: 80,000psi
Dyneema (UHMWPE fibers): 330,000 - 500,000psi*

*Plastic

Also,

Lead: 1,700psi
Aluminum (elemental): 5,800psi
Tin (elemental): 2,200psi
HDPE: 5,400psi*
Type 6/6 Nylon: 10,900psi*

*Plastic

So no, metals are not always stronger.
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Unread postAuthor: spudbud101 » Sat Jun 30, 2007 2:19 am

Dude, you could make the world's biggest hybrid with Dyneema, if they made it into pipe. (They don't, I checked their website. :D)
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Rawr.
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Unread postAuthor: to_live » Sat Jun 30, 2007 3:05 am

arguing over the internet is like competing in the special olympics, even if you win your still retarded. who cares about wether plastic is stronger than metal, that is offtopic to this thread, the main thing is, is that is this ok, and how serius the burns were and are you still allowed to build cannons?
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