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EHVH Mk 1-(warning large pictures)

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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EHVH Mk 1-(warning large pictures)

Unread postAuthor: frankrede » Tue Nov 13, 2007 7:38 pm

Extreme High Velocity Hybrid
This is my latest hybrid, it is made of steel, with 1/4" npt threads and a 1" 3000 psi steel union. It is all welded with 6010 root and 7018 caps.

It will have a dual spark plug ignition which will be powered by a stun gun.

I plan on taking it to 10x mixes in hope of putting a sabotted dart through 1/4" steel plate.
or at least 1/8" steel.
It should be in working condition by christmas.
I will be using air-propane, air-mapp, and possibly oxy-propane or oxy-mapp mixes.

I have one question though.
I mounted my union backwards instead of the usual way that they are mounted.
Will the burst disk slip out of the union when pressurized?
If so, does anyone have a recommended solution.
And if it does I could always just buy a second union and weld it onto the old one.

btw

Those welds may look bad but I assure you that the 6010 root pass came out nice and those welds you see are only caps.

Oh and heres some pics.

<a href="http://photobucket.com" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/101_0865-1.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>



<a href="http://photobucket.com" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/101_0867.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>



<a href="http://photobucket.com" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/101_0866-1.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>



<a href="http://photobucket.com" target="_blank"><img src="http://i30.photobucket.com/albums/c325/redensekjf/101_0868.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
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Unread postAuthor: Killjoy » Tue Nov 13, 2007 8:28 pm

Thats a fine looking almost done hybrid you got there. As far as I know it shouldn;t matter that you put the union on back wards, It should still work fine. If not you could always grind the lip flat and glue on some gasket material liek Spudblaster did with his union.

You could also just grind the welds off and flip it round and re-weld it.
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Unread postAuthor: Novacastrian » Tue Nov 13, 2007 8:34 pm

Very solid looking set-up, good luck with the piercing. :)

Edit: Spelling
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Last edited by Novacastrian on Sun Dec 16, 2007 5:04 am, edited 1 time in total.
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Unread postAuthor: mopherman » Tue Nov 13, 2007 8:40 pm

Novacastrian wrote:Very solid looking set-up, gook luck with the piercing. :)

how did your peircing go? I remember you said you wanted to try it with your hybrid
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Unread postAuthor: frankrede » Tue Nov 13, 2007 9:03 pm

Killjoy wrote:Thats a fine looking almost done hybrid you got there. As far as I know it shouldn;t matter that you put the union on back wards, It should still work fine. If not you could always grind the lip flat and glue on some gasket material liek Spudblaster did with his union.

You could also just grind the welds off and flip it round and re-weld it.

Hmm yea, I think thats what I might do that, grind the lip off.
I wish I could just grind the welds off, but I used 6010 and it penetrates really deep.

@ Novacastrian: Thanks, Its going to take some luck, do you have any advice?
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Unread postAuthor: potatoflinger » Tue Nov 13, 2007 9:07 pm

Looks great, can't wait to see it finished!
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Unread postAuthor: noname » Tue Nov 13, 2007 9:20 pm

Looks fun; wish I could get a stun gun and weld stuff. I'd probably use some ridicuous 15-20x mixture though....
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Unread postAuthor: Killjoy » Tue Nov 13, 2007 11:08 pm

I wish I could just grind the welds off, but I used 6010 and it penetrates really deep.


You could cut the pipe near the union and then weld the union on the other way, and then you could just have a piece of pipe welded to the nut of the union.

Looks fun; wish I could get a stun gun and weld stuff. I'd probably use some ridicuous 15-20x mixture though....


Wait? you can weld stuff with a stun gun??? lol just kidding.
Actually I found that for hybrids an ignition coil with a camera flash capacitor discharged into it works much better then a stun gun for ignition of high mixes. It's much more reliable in my experience.
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Unread postAuthor: noname » Tue Nov 13, 2007 11:10 pm

I just need a bigger spark. My BBQ ignitor limits me to 6x. :cry:
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Unread postAuthor: Killjoy » Tue Nov 13, 2007 11:15 pm

Well with an ignition coil and capacitor, you'll be getting that spark.
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Unread postAuthor: frankrede » Tue Nov 13, 2007 11:43 pm

Does anyone know if spark plugs can be welded along the metal part above the threads?
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Unread postAuthor: Killjoy » Tue Nov 13, 2007 11:47 pm

Not sure, but wouldn't you want it to be servicable in case it failed for whatever reason? And I would think the heat from welding might have the possibilty of damaging it in some way.
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Unread postAuthor: frankrede » Tue Nov 13, 2007 11:50 pm

hmm I think I might need to try it on a piece of scrap steel and a old plug.
then test it for spark.
I want to weld it because I don't trust putting my own threads on the existing threads.
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Unread postAuthor: Killjoy » Tue Nov 13, 2007 11:56 pm

Sounds like a plan lol. You know you could always try you hand at making you own spark plug out of a threaded plug, wire, and epoxy.
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Unread postAuthor: frankrede » Tue Nov 13, 2007 11:59 pm

Yea, I have done that before. I used it on one of my other hybrids using a 1/8" nipple.
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