Buda, there's been discussion and the spark is nothing. The amount of current/voltage (as long as the mix ignites) will not change power in any way, unless you are pumping enough current to form plasma from your electrodes.

Not bad :wink:

Thanks! That just saved me a bunch of money and time ...

One area of improvement would be the spark. Although it works, there appears to be a split second delay in the firing and I'm thinking a "hotter" spark might lead to a faster, more powerful explosion. At least that's how it works with racecars and spark plugs.

jackssmirkingrevenge wrote:Nice bit of theatre, though you need heftier projectiles to do some real damage

What do you suggest? I'm open to try anything.

far_cry wrote:oh my god you blow up a large (52" ??) lcd( plasma?)

you have a lot of mony i guss

Glad to see the video fooled someone.

We used the same psi for each shot; before I could start trying different values the cpu fan broke and the gun wouldn't fire.

I need to put in a new fan and hotter ignition for a faster response and better explosion.

Enjoy.

-video link is dead-

My first post on this cannon is in the showcase section.

My buddy has a 65" Mitsubishi big screen TV that no longer works; we plan to take it out this weekend and go to town on it with potatoes. I'll film it and post once completed.

Update: new video is posted on youtube.

Those large screw in drain plugs are a real hazard especially on higher powered advanced models. Don't be surprised when it blows out someday soon.


I filled the end-cap with epoxy to hopefully make it stronger.


Also the air vent...right behind your trigger hand. If you should forget to ...

I just created this video a few minutes ago.

This BMF is frickin' LOUD!!

I can't wait to test a potato where there's no leakage around the ammo like there is with the paper/duct tape balls I make. THEN it should really give me some distance.

[youtube]http://www.youtube.com/watch?v=OomT4qR-ZO8 ...

Moonbogg wrote:Screw it. Start with 5% then tweak from there.

That's funny...that's what I was thinking.

Hey REALLY nice gun man 8)
Hey how did you get the electric igniter onto your handle like that? :shock:

I started with a 1" PVC T and cut out a notch for the ignitor, then used JB Weld to smooth out the seams and hold it together. Then I sanded it all down.

To attached, I sanded (via dremel) a ...

The proper fuel ratio for MAPP is a bit of a problem. MAPP is a mitutre of things, primarily methyl acetylene, propadiene and propane. The exact mixture is ...?

Methyl acetylene and propadiene have the same fuel ratio (since they are chemical isomers and have the same molecular formula); 4.98% if ...

Oh...Sorry for spamming you but I had to mention another thing I liked...The LACK of a regulator! I am starting to think to hell with regulators. It keeps it cleaner, simpler and less expensive. It allows you to easily tweak the pressure and experiment on the fly. Either way is great, but what i'm ...

Very clean! The only suggestion I [had] was to simply go with one fan to vent and mix the fuel, but that's already been suggested. The extra fan isn't hurting performance or anything like that, it's just draining your battery more.

Overall A+.

The second fan draws (I think) something like .06AMP ...

I like this a lot.. I was gonna say that looks like a airsoft battery pack.. what type of connectors are you using for the battery?
It is...good call. It has a Tamiya connector on it and I can plug it into the cannon and easily unplug it to plug into my charger.


I know it would be more cohesive ...