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frustration

A place to ask general spud cannon related questions.
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Unread postAuthor: sandman » Sun May 13, 2007 6:46 pm

ok, for a school project i was first going to build a combustion cannon, then i decided that it would be easier to get the parts for a pneumatic. well, i just went to lowes and they had nothing. And the project is due in a week.

So, i think i will try mcmaster.

this topic is to discuss how many people use mcmaster as their supply instead of local stores.
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Unread postAuthor: Velocity » Sun May 13, 2007 6:49 pm

Ok...

Well, Mcmaster has decent prices and great shipping times. When I place orders, I usually receive them the next day. If I could use Mcmaster all of the time, I would. I only really use other places like local hardware stores, lowes, or home depot if I need only 1 or 2 pieces, or if I am not 100% sure of what I need, so then I inspect them at the local stores instead.
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Unread postAuthor: sandman » Sun May 13, 2007 6:56 pm

ok, im seeing now if they have all the parts i need, and i cant find a sprinkler valve

could you help me out?
or tell me if they dont have them
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Unread postAuthor: mopherman » Sun May 13, 2007 7:00 pm

well, a good alteanative to a sprinkler would be qev. I know mcmaster has those
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Unread postAuthor: sandman » Sun May 13, 2007 7:11 pm

um, well i just looked them up and they are $200-$460
um, that is quite out out of my price range
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Unread postAuthor: super spuder » Sun May 13, 2007 7:18 pm

holy crap, just build your selfe a piston valve :D 20$ canadian
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Unread postAuthor: sandman » Sun May 13, 2007 7:21 pm

well, see im doing a how to paper, so i want to keep it in the range for people who never made one before.

also, ive never made one before
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Unread postAuthor: super spuder » Sun May 13, 2007 7:26 pm

i don't know about anyone else, but i find piston valves easier to understand than QEV's it is just a round thing sliding back and fourth :lol: well actually, i just don't know how QEVs work haha, anyways, hope you get a good mark :D i wish i could build a spud gun for a school project. :cry:
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Unread postAuthor: sandman » Sun May 13, 2007 7:34 pm

lol, i love when the teacher lets you pick the topic

and i think i might be in luck with a place near me with a valve, but all the pipe i need from mcmaster
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Unread postAuthor: boilingleadbath » Sun May 13, 2007 7:39 pm

You are looking at the wrong valves if they are costing 200-400$; mcmaster's qevs are about 10-20$.

Check page 941.
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Unread postAuthor: sandman » Sun May 13, 2007 7:47 pm

ok, i looked and i dont think that a 1/2'' valve will work with a 2'' barrel
but i may be wrong
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Unread postAuthor: super spuder » Sun May 13, 2007 8:05 pm

it would work, but not very well :wink:
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Unread postAuthor: sandman » Sun May 13, 2007 8:15 pm

ok, i got another question, would a thin wall cleanout plug adapter be ok, because they dont have sch 80 of it
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Unread postAuthor: super spuder » Sun May 13, 2007 8:18 pm

for combustion i would say yes
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Unread postAuthor: frankrede » Sun May 13, 2007 8:24 pm

Use a threaded sch 80 plug if you need a plug.
And mcmaster has 4/4" qev's that work better than a 1" sprinkler valve.
for a 2" barrel it should work.
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