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3 inch piston

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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3 inch piston

Unread postAuthor: richardbridges » Wed Aug 23, 2006 5:48 pm

[img]
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77.jpg
77.jpg (4.9 KiB) Viewed 1919 times
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22.jpg
1. 3" rubber washer

2. 3" pvc disks

3. 2 5/8" dia., 1/4" thick pvc disks
(1/4" for ring expansion)
4. 1 9/16" pvc disks (inside dia. of
1 1/2" pcv pipe)

5. AS568A-334 orings (2 5/8" inside,
3" outside, 3/16" thick)

6. 4 1/4" long 1 1/2" pvc pipe

7. 2" to 1 1/2" bell reducers
22.jpg (17.28 KiB) Viewed 1919 times
11.jpg
I have not made equalization holes yet.
All disks were boiled and pressed from scrap pipe. Disks were cut out on a vertical lathe (an old drill press). Tell me what you all think.
11.jpg (9.13 KiB) Viewed 1919 times
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Unread postAuthor: Velocity » Wed Aug 23, 2006 5:50 pm

it looks a bit big, but nonetheless beautiful! I would love to have a lathe, but I cannot justify spending $300+ just to make oring grooves; its barrel sealers for me!
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Unread postAuthor: richardbridges » Wed Aug 23, 2006 5:52 pm

hit garage sales for old drill presses. You can find them for 50 and under
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Unread postAuthor: noname » Wed Aug 23, 2006 6:15 pm

Wow. That is very nicely done. Is that for a barrel sealing piston or chamber sealing? (rmich, it could be for either)
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Unread postAuthor: saladtossser » Wed Aug 23, 2006 6:20 pm

thats a pretty nice looking piston, was any glueing done between the disks? or is it just held together by the bolt?
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Unread postAuthor: Shrimphead » Wed Aug 23, 2006 6:45 pm

Looks great! Nice work.
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Unread postAuthor: richardbridges » Wed Aug 23, 2006 6:54 pm

no glue yet. Wanted to be able to show the pieces.
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Unread postAuthor: SpudStuff » Wed Aug 23, 2006 7:14 pm

Very Well Done.
You should make a 4" version
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Unread postAuthor: Bluetooth » Wed Aug 23, 2006 7:29 pm

You should use rubber sement to glue them because it would make a kind of like rubber padding and you could still take them apart if you needed to fix something.
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Unread postAuthor: richardbridges » Wed Aug 23, 2006 8:03 pm

It is for a barrel sealing cannon. I'll put it together this weekend.
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Unread postAuthor: Flinchy » Wed Aug 23, 2006 8:17 pm

i like how cleanly you were able to construct it, great job!

-flinch :)
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Unread postAuthor: huse_spud » Wed Aug 23, 2006 8:26 pm

sweet! too bad my life's too busy to build spudguns anymore :(
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Unread postAuthor: mark.f » Wed Aug 23, 2006 9:31 pm

Holy crap that thing is sexy!

I like how you combined a crapload of components into one smooth and steamlined piston. Great work.
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Unread postAuthor: badkitty » Tue Sep 12, 2006 9:05 pm

may i ask ...how much u spent on all those parts ? if u kept track
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Unread postAuthor: MrCrowley » Tue Sep 12, 2006 10:56 pm

wow, nice piston, beats my pringles 3" anyday, how much does that thing weigh?
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