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A place to ask general spud cannon related questions.
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Unread postAuthor: boom_o_matic_2.0 » Tue Apr 28, 2009 2:37 pm

yea. do they make them in like 1"?
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Unread postAuthor: Moonbogg » Tue Apr 28, 2009 2:41 pm

inonickname wrote:Hijacked? This thread is for everyone mate.


I know, sorry lol. I was really tired and totally misjudged the thread and thought I created it haha. Of course, its been here for decades and made for everyone to join.
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Unread postAuthor: inonickname » Wed Apr 29, 2009 3:55 am

Moonbogg wrote:
inonickname wrote:Hijacked? This thread is for everyone mate.


I know, sorry lol. I was really tired and totally misjudged the thread and thought I created it haha. Of course, its been here for decades and made for everyone to join.


Yep, getting close on two weeks :roll:

No problem, that gun should be a monster when it's done.

I considered making the engine double acting but decided against it. This should have power a plenty but the final design (final final final) will run on unregged CO2. (not this engine, probably 1 cylinder- it's for my Aussie version of pinewood derby)

Edit:

If I had pneumatic legos (like the only kind of legos I don't have!)I'd build something like this:

Image

Image
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Unread postAuthor: i-will » Wed Apr 29, 2009 5:30 am

40mm combustion cartridge 6pack launcher for airsoft. i can't find anything that will fit in the tubes perfect enough so i might make the cartridges out of rolled paper. hopefully i'll actually start on it so i can show it off on the forum.
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WHY PAY FOR IT WHEN U CAN MAKE IT?
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Unread postAuthor: SubsonicSpud » Wed Apr 29, 2009 6:01 am

inonickname wrote:
Moonbogg wrote:
inonickname wrote:Hijacked? This thread is for everyone mate.


I know, sorry lol. I was really tired and totally misjudged the thread and thought I created it haha. Of course, its been here for decades and made for everyone to join.


Yep, getting close on two weeks :roll:

No problem, that gun should be a monster when it's done.

I considered making the engine double acting but decided against it. This should have power a plenty but the final design (final final final) will run on unregged CO2. (not this engine, probably 1 cylinder- it's for my Aussie version of pinewood derby)

Edit:

If I had pneumatic legos (like the only kind of legos I don't have!)I'd build something like this:

Image

Image


I was going to post a link to that. I made a 4cyl inline lego one about a year ago :D
They use the style or crank like I mentioned earlier

SubsonicSpud
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Unread postAuthor: inonickname » Sat May 02, 2009 4:56 am

Getting supplies for 5 kg (!) of thermite.

*To avoid being naughty I'm not going to say what thermite is, what to use it for or how to make it.

Heating up the foundry again tonight, made a new crucible. Any ideas on what to cast?
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Unread postAuthor: SubsonicSpud » Sat May 02, 2009 5:24 am

inonickname wrote:Getting supplies for 5 kg (!) of thermite.


Mmmmm Thermite :twisted: Great stuff :D
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Unread postAuthor: psycix » Sat May 02, 2009 6:28 am

Any ideas on what to cast?

Projectiles?
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Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

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Unread postAuthor: inonickname » Sat May 02, 2009 6:32 am

psycix wrote:
Any ideas on what to cast?

Projectiles?


My launchers are small bore mostly, and I use lead-split moulds for them.

Asides, aluminum is not that great as far as projectiles go.
May experiment with clay for the action for a new pcp..
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Unread postAuthor: inonickname » Sat May 02, 2009 11:19 pm

Here's a sneak peak, maybe the last one as this is a contest entry.

Here's the muzzle brake (.378 cal/9.6mm)

5 rounded cuts up the top, then flat vents with 2 holes in between (2 per side). Should work nicely.

Image

Image

I shouldn't show much more..

Edit: far out. For my set of contest photos def. borrowing dad's camera..look how focused the tin can is. But if I go that far away you can't see it.. This camera doesn't even have macro.

Here's a photo of a much smaller, more detailed thing with a better camera:

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Unread postAuthor: jackssmirkingrevenge » Sun May 03, 2009 2:32 am

Here's what I'm working on :)
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Unread postAuthor: inonickname » Sun May 03, 2009 2:36 am

May this be a contest entry JSR? If so it's nice to know I only need to compete with an 850 psi, 100 rps borderline supersonic cannon.
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Unread postAuthor: jook13 » Sun May 03, 2009 2:38 am

May this be a contest entry JSR? If so it's nice to know I only need to compete with an 850 psi, 100 rps borderline supersonic cannon.


Dude... It is ON!
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Unread postAuthor: jackssmirkingrevenge » Sun May 03, 2009 3:06 am

inonickname wrote:May this be a contest entry JSR? If so it's nice to know I only need to compete with an 850 psi, 100 rps borderline supersonic cannon.


What, there's a contest on? :D

Actually, I've been thinking. The whole reason I embarked on my full auto saga is because I was stuck with compressor pressures and wanted to increase the power of individual projectiles. Now that I have 850 psi on tap, well... that's 8 times the power potential, what's the point of a reciprocating mechanism? I've added a detent to give the pressure time to build up in the chamber, we'll see how it goes :)
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Unread postAuthor: inonickname » Sun May 03, 2009 3:24 am

jackssmirkingrevenge wrote:
inonickname wrote:May this be a contest entry JSR? If so it's nice to know I only need to compete with an 850 psi, 100 rps borderline supersonic cannon.


What, there's a contest on? :D

Actually, I've been thinking. The whole reason I embarked on my full auto saga is because I was stuck with compressor pressures and wanted to increase the power of individual projectiles. Now that I have 850 psi on tap, well... that's 8 times the power potential, what's the point of a reciprocating mechanism? I've added a detent to give the pressure time to build up in the chamber, we'll see how it goes :)


Making the bottle last 3+ seconds..

Bah, who knows..I just hope I get my gun finished before that little box with (XXXX contestant) appears..
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