newbie planning to go all out :-)

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
natas
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Sun Apr 15, 2012 3:04 am

guess ill just stick to the plan, and do finetuning when the cannon is up and running.

My calculations are :

chamber: 5700ml x 0.042= 239.4ml
measuringpipe: 239.4ml at 3bar = 79.8ml

so im trying to make my new pipe as close to 80ml as possible :-)


thnx alot for all your inputs :-) it really helps to get feedback for a first timer :-)
Last edited by natas on Sun Apr 15, 2012 2:21 pm, edited 1 time in total.
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natas
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Sun Apr 15, 2012 5:47 am

I got this idea of using a old panasonic drill as handle for my cannon. I get a ok handle, and a rechargeable battery :-)

Making room for the "trigger" micro switch

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Blue Leds to indicate when the fan is running

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Red Leds to indicate armed trigger

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overall wiev of the handle, with the switches on the side for the ignitor and fan.

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will come back with more soon :-)
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natas
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Sun Apr 15, 2012 2:30 pm

the new fuelmeeter done :-)

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jackssmirkingrevenge
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Sun Apr 15, 2012 2:33 pm

coming along very nicely!

should have used one of these though :D
hectmarr wrote:You have to make many weapons, because this field is long and short life
natas
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Sun Apr 15, 2012 3:12 pm

they have been considered :-) i actually have two of those switches laying on my shelf after a NOS project on one of my old cars (red ones, not carbon). but i found them too big for my handle :-)
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natas
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Tue Apr 17, 2012 5:29 am

Ha ha ha.. just did a pressure test on the meetering system, the regulator is leaking gass all over, and the two gauges differ 1 bar !!!.. lol..
Better get me a quality ones...
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natas
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Sat Apr 21, 2012 1:24 pm

replaced the cheap regulator and gauges with kickass quality regulator, and oilfilled gauges, high-end accurate stuff. did a dry testfire today, and was rewarded with a loud sharp bang with almost no flames :-)... cant wait to get this babe finnished :-).
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natas
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Tue Apr 24, 2012 4:59 pm

Ok.. so here is the new gauges and regulator, works like a dream !!
Trigger grip mounted with safety switches, and rechargeable battery :-)

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Now I only need to get the brackets for the gas tank done, and the spud is more or less finished :-)


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Here im working on the brackets for the gas tank holder, old scool style, CNC version 0.1 beta :-)


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natas
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Tue Apr 24, 2012 6:53 pm

BTW : the things i post now... should they rather be in the showcase area ?
or is that just for "finished" spudguns ? :-)

and or is it just irritating that i post progress at all ?


im just asking since im new here..
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warhead052
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Tue Apr 24, 2012 10:37 pm

Nah, these progress reports are pretty cool. Save the showcase for when its complete. Looks really good! Can't wait to see more from you!
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jackssmirkingrevenge
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Wed Apr 25, 2012 12:07 am

Very nice! And old machines yay!
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Moonbogg
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Wed Apr 25, 2012 2:23 am

Thats awesome. Did you bolt the camlock to the PCV wall?
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jackssmirkingrevenge
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Wed Apr 25, 2012 2:29 am

Moonbogg wrote:Did you bolt the camlock to the PCV wall?
I think that's the "standard" attachment from Ultimate Spudgun.
hectmarr wrote:You have to make many weapons, because this field is long and short life
natas
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Wed Apr 25, 2012 3:54 am

Moonbogg, its the utimate spudgun attachment.. if it works, dont fix it:-)

i have done a more or less standard project, and copied other peeps working cannons for my first project, to get a understanding of how things work. guess ill start experimenting with my own sollutions on my next one :-)
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Crna Legija
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Wed Apr 25, 2012 4:32 am

lol I wouldn't say that's standard its defiantly one on the best combustions on the files, especially for a first. Great work!
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