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newbie planning to go all out :-)

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: Zeus » Wed Apr 25, 2012 4:39 am

Very nice work, good to see more combustions. But there's one thing I'm not sure about. How do you disconnect the hose when you open the camlock? The picture shows what I mean.
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Unread postAuthor: natas » Wed Apr 25, 2012 5:06 am

The cannon is not finished yet :-)

On the to do list is a bracket for easy removal of the tank, and a coupling on the hose.
And im gonna use a HANSEN couppling on the hose for easy removal.



One like this, wich is airtight in both ends

Image

edit:
and i also plan to make a quick connect silencer... this baby is loud :-)
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Unread postAuthor: natas » Wed Apr 25, 2012 5:10 pm

Had to try brake something with potatoes, went straight trough :-)...
And im still on propane and not MAPP yet.

[youtube]http://www.youtube.com/watch?v=Yqnrlh1vnJU[/youtube]


was hard to stop breaking stuff.. :lol:

[youtube]http://www.youtube.com/watch?v=7Bj8PBWo3-c[/youtube]


:D :D :D
[youtube]http://www.youtube.com/watch?v=HgFks1KZ8iY[/youtube]
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Unread postAuthor: jackssmirkingrevenge » Wed Apr 25, 2012 8:16 pm

The evil laughter says it all, you can almost hear a child going "Daddy, my tractor! Why?!" in the background :)

Great job, I predict a hybrid soon hehe
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Unread postAuthor: Moonbogg » Wed Apr 25, 2012 10:02 pm

Thats a really clean cannon. Very well done. It sounds like you have ideas for a custom design at some point.
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Unread postAuthor: natas » Sun Apr 29, 2012 12:18 pm

hmmmm... having a problem with my igniter from ultimatespudgun.

i have fired about 50 rounds with the cannon, and it suddently stopped working. i have changed the battery, and checked that there is no potato shortsircut at the spark gap.

i have led diodes lighting up when the ignition is armed, and they drop a little in power when i try to fire. so therefore i assume that the unit is getting/drawing power :-)


any suggestions ??
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Unread postAuthor: jackssmirkingrevenge » Sun Apr 29, 2012 12:23 pm

Is it making any noise at all?
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Unread postAuthor: natas » Sun Apr 29, 2012 12:42 pm

nothing

its just dimming a littlebit in the diodes.
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Unread postAuthor: jackssmirkingrevenge » Sun Apr 29, 2012 12:52 pm

Hmmm... could you have burnt it out?
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Unread postAuthor: Fnord » Sun Apr 29, 2012 3:11 pm

Probably fried it, but check your wiring first.
I would think that, contrary to popular belief, stunguns are not really a durable solution for combustions. They're designed to put out a lot of power for a short time without much thought to being overbuilt.

Presumably if you burn out a stungun using it for what it's intended for, you're probably having a very, very bad day. The manufacturers don't worry about this because these types of people rarely get a chance to file a lawsuit.
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Unread postAuthor: natas » Sun Apr 29, 2012 3:21 pm

cant really understand if its fried...

is makes 2-3 sparks every time i fire.. and i have never made sparks for fun :-(

Guess ill have to do the crappy job of dismantle it from the chamber and see if i can se anything wrong.
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Unread postAuthor: natas » Tue May 15, 2012 6:08 pm

More parts done, now the cannon is nearly done :-)


Cutting out the aluminium brackets for the gas tank holder

Image


Nearly done, now im cutting out the rest with a band saw

Image


Test mount with the polished brackets, not sure i like the polished finish, think I will give them a layer of paint.

Image

Image


Now ill take the cannon apart, and give it all a last layer of paint, a lot of scratches after testing gear during the build and test shooting, and mount the MAP gas :D
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Unread postAuthor: mattyzip77 » Tue May 15, 2012 7:15 pm

Very nice cannon and very clean work. I am impressed to say the least. If you dont mind me asking, where did you get the chamber and or chamber material from??
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Unread postAuthor: natas » Tue May 15, 2012 7:39 pm

As described earlier in this thread, most of the pvc comes from utlimatespudgun, only reason for that, its not possible to get these PVC parts in Norway (i searched for 3 weeks)
This is my first spudgun, so when i had to order parts online anyways, i ordered them from ultimate, and got it all right the first time , instead of another random pvc supplyer, with trying and failing :-)
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Unread postAuthor: natas » Sat May 19, 2012 3:41 am

12mm. plywood.... just for fun :D

[youtube] www.youtube.com/watch?feature=player_em ... KFBQGl0UCM [/youtube]



edit: not able to post this right atm.. youtube tags dont seem to work :P
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