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Brplatz and Sddds13 new hybrid

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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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 2:30 pm

brplatz wrote:i think i will put an oring on the union if it doesnt seal very well. Does it need one on each side or not?


it needs one (or two) on the chamber side. the chamber side should be the male part
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Unread postAuthor: brplatz » Sun Jun 22, 2008 4:02 pm

it will be like so:
you fuel it and all the gas is in the back of the chamber, then you add air pushing all the fuel away from the spark plug.


Diffusion?

it needs one (or two) on the chamber side. the chamber side should be the male part


ok sweet that will work i have some
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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 4:04 pm

what do you mean by "diffusion"?
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Unread postAuthor: brplatz » Sun Jun 22, 2008 4:18 pm

diffusion- http://members.aol.com/profchm/graham.html

Basically if you put the propane in then the air it moves it away from the ignition but the propane will diffuse and spread evenly throughout the chamber. Then it will ignite in the back, front, middle, wherever.
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Unread postAuthor: DYI » Sun Jun 22, 2008 4:32 pm

What pressure have you tested that sparkplug to? Because the current design is almost guaranteed to leak between the wire and its casing, unless there's something in the middle which prevents that.

How close do you plan on standing to that thing? 160 psi precharge should be fine (about 11x) as long as you go about it safely. That should still give you a safetly factor of almost 2.
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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 4:51 pm

DYI you noticed you said almost 2? then your hybrid would have been shreads
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Unread postAuthor: brplatz » Sun Jun 22, 2008 4:55 pm

Havent tested the sparkplug yet but it will be filled with epoxy. Will that hold up to the 11x pressures you speak of?

Im not sure what X we will bring it to but it will most definalty be remote detonated 6-8x and over
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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 5:01 pm

brplatz wrote: Havent tested the sparkplug yet but it will be filled with epoxy. Will that hold up to the 11x pressures you speak of?

Im not sure what X we will bring it to but it will most definalty be remote detonated 6-8x and over


DDT? :P

and look at the "brass bruiser" for the wire problem.
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Unread postAuthor: DYI » Sun Jun 22, 2008 5:11 pm

DYI you noticed you said almost 2? then your hybrid would have been shreads


Not quite sure I follow here. You do realise that oxy/fuel mixes, for a given amount of fuel, only have slightly over half the power of air/fuel mixes, right? My 20x shots have all been oxy/fuel.
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Unread postAuthor: brplatz » Sun Jun 22, 2008 5:22 pm

:P Haha sorry when i was typing that my dad was telling me how they make bombs and detonate them out of steel like this.
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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 5:22 pm

ohh i see.. and you used a "weak" disk
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Unread postAuthor: brplatz » Sun Jun 22, 2008 5:27 pm

brass bruiser has no pics

should i just read the whole thing? :D
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Unread postAuthor: SpudFarm » Sun Jun 22, 2008 5:29 pm

he had leaks through a wire and put some drops of super glue on the end and it was air tight. :)
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Unread postAuthor: brplatz » Sun Jun 22, 2008 5:32 pm

Ok thanks

I dont have any super glue ATM but i think epoxy should hold correct?
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Unread postAuthor: sddds13 » Sun Jun 22, 2008 6:22 pm

I can get us superglue. lol for cheap. pressure rated to 1750 PSI
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