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Old 04 December 2008, 16:44   #11
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Does anyone know if the L200 wheels will fit my 3.2 52 Plate Shogun?

Just noticed the 'hole' in the middle is far too large for them to locate properly.



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Old 04 December 2008, 16:46   #12
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easy start, hairspray, lighter fluid, it all works. hairspray infact gives one of the biggest bangs and seems to ignite easily, wether its a stoichiometric mix or not, others are fussy and you need the fuel air ratio correct.
I did quite a bit of research on combustion pressures for all these making an F off big spud gun!
Hairspray Knackered the garage door at 10 feet,1.5" thick pine smashed to bits with a king edward slug
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Old 04 December 2008, 17:50   #13
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I love chemistry .. and tattie guns .. mind you,... there would have been a bit of 'experimental' use of propellants with the hairspray test I fear ? .... erm .. something like the more compressed the ignition space the faster they burn ... bet I get deleted for that tip
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Old 05 December 2008, 08:06   #14
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The absolute best is a stoichiometric mix of oxygen and acetylene
to get the pressure up you need a rupturable membrane of thick damp course polythene across the base of the launch tube, so pressure builds up before rupturing the membrane and launching the spudof course as you point out a bit of pre compression helps too!!
Turnips make better projectiles theyre tougher than spuds! but believe me there is a lot of energy in a litre of that mix going up i wouldnt recomend it. You shouldnt use plastic tube and if the barrell is 2" pipe it will floor you with the recoil when you pop the igniter.
DONT TRY IT AT HOME.
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Old 05 December 2008, 22:52   #15
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DONT TRY IT AT HOME.
Unless you're invited, right?
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Old 06 December 2008, 13:17   #16
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The absolute best is a stoichiometric mix of oxygen and acetylene
Oooooohh yes

When trying to keep the girl in the office awake, I used to fill a 250ml empty plastic water bottle and lob it into the fire now and again, such a big bang from such a small bottle Dont believe anyone who says it isnt volatile since one day I'd filled the bottle but forgot to put a flash hole in it , so I stabbed it with a screw driver, and gues what ? ...... yup cost me a pullover and some eardrums
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Old 07 December 2008, 16:33   #17
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i use liquid nitrogen..........time bomb
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Old 07 December 2008, 17:06   #18
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i use liquid nitrogen..........time bomb
.. erm for what seing as its almost inert? ..looks good when you throw it on the carpet mind you
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Old 08 December 2008, 07:08   #19
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well, if you put an inch in the bottom of a pop bottle, then screw the lid on, when it starts to warm up................

nitrogen cant remain liquid at above -147 no matter what pressure builds up ,and expands by around 700 times between the liquid and vapour phase .......bang just as good as hairspray but a bit cooler.
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Old 08 December 2008, 12:38   #20
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Well at least its non toxic just dont put ya finger in it
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