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Posted: Wed Nov 01, 2006 10:26 pm
by ProfessorAmadeus
Those look like V-MAX bullets use in preision cartridges used for varmint hunting. Those are really nicely made and he did a great job!

Posted: Wed Nov 01, 2006 10:50 pm
by SpudStuff
CNC is Computer Navigated Cutting. It is pretty much a computer controles lathe that makes parts from CAM (computer aided machiening) drawing.

Posted: Wed Nov 01, 2006 11:01 pm
by reaper613
actually CNC stands for computer numerical control

Posted: Wed Nov 01, 2006 11:01 pm
by squeaks
Oh, they have one of those at the college here. I would never be allowed to use it though. Those things are super cool!

Posted: Wed Nov 01, 2006 11:08 pm
by SpudStuff
There is a problem with your write up reaper. You said you used a 20 PSI mux of actylene and OXY. The actylene and OXY mux self detonates ar ~15 PSI. There for I don't think you used that mix in the cannon. On top of thatwhere is the gauge to tell you the pressure?

Posted: Wed Nov 01, 2006 11:20 pm
by reaper613
where did u hear that? cause i can tell you from expirence that it dosent it just gets a little unstable and only explodes with extreme violence, such as dropping it

Posted: Sun Nov 12, 2006 11:35 pm
by spud-tom
what IS a hybrid?
is it like a combustion

Posted: Sun Nov 12, 2006 11:54 pm
by MrCrowley
OMFG tom....search next time ok.a hybrid uses compressed gas and fuel and ik got that from the forum index under "hybrid disscusion"

Posted: Mon Nov 13, 2006 12:03 am
by BC Pneumatics
Very nice job. (And yes, there is a reason this is the only build I have commented on in months.)

Posted: Mon Nov 13, 2006 1:05 am
by iamthewalrus
wow, just seeing this has made me want to start building again. the first cannon ive seen in a long time that brings me back to the good ol' days when people took time and effort to make their cannons worth while. i might actually take some time and make a new cannon now. thank you reaper. :D much respect.

Posted: Mon Nov 13, 2006 1:30 am
by rna_duelers
He might not reply to this but how is the sparkplug attached?I have searched around and asked at auto stores if there is a special type of tap used but it was to no avail.Or was it just welded in place?

Posted: Mon Nov 13, 2006 12:58 pm
by reaper613
mine is just welded in place (mistake cause its a pain to clean the damn thing) but you can buy a plug that has a sealing ring attached to it so that when you tighten it the ring squishes and seals. you can also buy little copper rings that do the same thing for regular spark plugs, you can buy them at the same place where you got the spark plug and if not look at the local auto parts store. also there are taps you can buy for spark plugs, and for some plugs the tap is just a regular one (sorry cant remember the size)

Posted: Wed Apr 07, 2010 5:00 pm
by reaper613
Well its been a while but I figured some of you might get a kick out of this

Posted: Wed Apr 07, 2010 5:19 pm
by deathbyDWV
It has been a while! Only 4 years... That is a cool flash though...

Posted: Fri Apr 09, 2010 2:26 am
by CpTn_lAw
Shock Diamonds at the exit?? What mix did you use this time? Have you put a burst disc on this baby? Still oxy-acetylene?

It's funny, it looks like a "pocket" of flame was "pushed" by the pressure blast :D

Oh and last but not least, damage pics? What performance do you get out of it in terms of muzzle velocity, energy?