go to spud wiki and search "flyback" if you can get the parts for one your set

so far its the best igniter next to carge box igniter

the plan is for a mix of fuels im going to concoct using some knowledge of chemistry and so teenage injanuity (lol) as my choice of fuel

i came across a web page on fuel combustion and basicly i can make a simpler form of tri poxy hexane wich is like using jet fuel and liquid nitrogen together

so ...

well sa potatoes are way denser and longer giving them a longer shape in the barrel

more punch!!!!

its ok i my dad can get the parts for me through his work and itll cost me a fraction

the reason im going for thease particular sizes is for the methanol mist combustion theory

it needs lots of air and makes big presure so the sizes are all good but i might make the chamber i bit smaller

chamber:
20cm diameter (outside)
50cm lenght

barrel:
150cm lenght
5cm diameter (outside)

ignition:
9 volt car battery-charge coil-automotive spark plug

fuel:
airosole spry maybe lynx (due to hight alchole content)

if i get it right ill try methanol in mist form (squirted into ...

to answer your one might as well save the propane and add a little more air instead, right?

yes the optimal for single fuel to oxy is around 2:1 (2 oxy for 1 fuel)
but when you use mix gas fuel it gets more complex

it depends ont the 2 (or more!!?) fuels you use, and this is where carbon ...

i wonder what the rules in new zealand are as im on task to build my first spudzooka (its gona be a baaad boy!!) and i dont wont to get a crimanal record as im trying to get into the navy further down the track

no but a south african sweat potato could do it straight from the barrel

have you seen how dens they are but yes you are right on the way back down not even one of my home land monstre potatos could make it through sheet metle

i thought so too....lol

this is nuts i would love to make one

pain in the but to reload i bet

the mechanism works with a powder charge used in concrete nail guns
the release time of the iris is faster, discs has to blast into little peises wich means that there is a delay time. physics lesson, to blast something into little peises needs energy, opening something with separate energy source ...

thanks ill look into it some more

see my dad will only let me build a spudzooka if i present full plans and ideas and that it will work well and safe

an iris system on powder opening charge is the fastest release valve on the planet

ill post again with some pics of the system

how about a car spark plug??

ever thought of using one of them
i've never had a go at using one in fact i'm in the middle of designing my first cannon so mabye i should open a topic just for my spark plug theory?

price wise yes burst disc are un matched but i was merely stating the insane things that can be achieved