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[update](new vid)Piston material.

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: Counterstriker » Wed Mar 12, 2008 7:36 pm

hubb017 wrote:Sorry for not clarifying (and, yes, I simply edited the original pic).

First, the piece around the piston is something I did not erase from the original pic. It is whatever you intended it to be.

As far as connecting it together, tap a 1/8" npt hole in the end of the cap and put a pipe nipple (short piece of pipe threaded on both ends) through the hole. Secure the tee to that, then the schrader and blowgun.


Do I really have to drill a hole through it?

Click me!

I don't think he drilled any holes. I know that it is only 1/2", but I would guess they have reducers for a 3/4" or 1". Thanks for you patience :)
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Last edited by Counterstriker on Wed Mar 12, 2008 7:45 pm, edited 2 times in total.
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Unread postAuthor: bigbob12345 » Wed Mar 12, 2008 7:37 pm

To get the link to work replace the img at the start with url :)
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Unread postAuthor: Counterstriker » Wed Mar 12, 2008 7:38 pm

Counterstriker wrote:
hubb017 wrote:Sorry for not clarifying (and, yes, I simply edited the original pic).

First, the piece around the piston is something I did not erase from the original pic. It is whatever you intended it to be.

As far as connecting it together, tap a 1/8" npt hole in the end of the cap and put a pipe nipple (short piece of pipe threaded on both ends) through the hole. Secure the tee to that, then the schrader and blowgun.


Do I really have to drill a hole through it?

Click me!

I don't think he drilled anyholes. I know that it is only 1/2", but I would guess they have reducers for a 3/4" or 1". Thanks for you patience :)
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Unread postAuthor: Counterstriker » Wed Mar 12, 2008 7:40 pm

Sorry for the double post but I hit quote instead of edit.. and I can't delete it.. I am an idiot..
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Unread postAuthor: Hubb » Wed Mar 12, 2008 8:07 pm

I'm sorry. I was thinking of a larger PVC launcher. I guess that came from the diagram. With a smaller one, you could get a bushing (if necessary) to do the same.
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Unread postAuthor: Counterstriker » Wed Mar 12, 2008 8:56 pm

Ok I made a drawing on google sketchup.. it sucks because its the second thing I ever made..but I don't know how to convert SKBs..
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Unread postAuthor: Counterstriker » Thu Mar 13, 2008 8:00 pm

Hey! Sorry for the triple post :oops: . It won't let me delete.. (can a mod help me out :) ) But this is my basic design. I am hoping to order the epoxy this weekend, I will see if home depot has it but last time I was there it was all thick junk..
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Unread postAuthor: elitesniper » Thu Mar 13, 2008 8:21 pm

looks good, but is that square in the fount going to be a clean out or something?
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Unread postAuthor: Counterstriker » Thu Mar 13, 2008 9:16 pm

elitesniper wrote:looks good, but is that square in the fount going to be a clean out or something?


I just put it there to show that there will be some reducers : ) Will they have reducers to.. 8mm or.. 6.. aroung there? Or will I have to make some epoxy casts..
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Unread postAuthor: Counterstriker » Thu Mar 20, 2008 1:44 pm

[youtube]http://www.youtube.com/watch?v=tkCPPSnjlnA[/youtube]
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Unread postAuthor: bigbob12345 » Sat Mar 22, 2008 9:52 pm

looks quite good so far
Well I prefer the good old marine epoxy but yes there are better things to use.
one thing though.
when i made my coax it wouldnt actuate with just the blowgun normally I had to mod it. But a 1/4in ball valve gives much higher performance than even a modded blowgun.
Its probably already been mentioned but what pressure do you plan on useing?
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Unread postAuthor: Counterstriker » Sat Mar 22, 2008 10:38 pm

bigbob12345 wrote:looks quite good so far
Well I prefer the good old marine epoxy but yes there are better things to use.
one thing though.
when i made my coax it wouldnt actuate with just the blowgun normally I had to mod it. But a 1/4in ball valve gives much higher performance than even a modded blowgun.
Its probably already been mentioned but what pressure do you plan on useing?


Well.. I am guessing about.. 200 psi. I am buying a new 2 gallon compressor monday also with the rest of the pieces I need, (shrader, 3/4 reducer, 1/2 bushing and 3/8" pipe). But when you say a ball valve is faster, will the blowgun still be efficeint?
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Unread postAuthor: elitesniper » Sat Mar 22, 2008 10:39 pm

that blow gun is the wrong way, you should swtich it to the 1/4 npt side the other side leaks.
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Unread postAuthor: Counterstriker » Sat Mar 22, 2008 11:12 pm

elitesniper wrote:that blow gun is the wrong way, you should swtich it to the 1/4 npt side the other side leaks.


Yah I know it will still work, I made a topic on why I did that. I was told it will still work to pretty much the same potential.
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Unread postAuthor: Counterstriker » Mon Mar 24, 2008 4:50 pm

I had a change of plan. The piston will be in the 1/2" nipple (right next to the 1/2 tee). So the problem is the barrel will be long, I already cut it to right size, How can I stabalize a 3/8" barrel in a 3/4" chamber? (this is all steel, the barrel is copper).

Thanks!
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