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need help and conseils thank you

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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need help and conseils thank you

Unread postAuthor: romelectrofr » Thu Jul 25, 2013 12:20 pm

Hello i am french and i have try to make an new spud gun this is my 4 th spud gum
but he don't shoot i have an flash electronic allumage fonctionnal
and an fonctionnal ventalation systeme butvi think
he don't shoot because the ventilator can't left
the propane enter in the combustion chamber and i want
try an direct gaz injection systeme i use gaz of
deodorant can you help me [img] thank you
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Unread postAuthor: jackssmirkingrevenge » Thu Jul 25, 2013 12:50 pm

[youtube]http://www.youtube.com/watch?v=EoVDuh3ziNg[/youtube]
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Unread postAuthor: romelectrofr » Thu Jul 25, 2013 3:44 pm

thank you i will try
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Unread postAuthor: romelectrofr » Sat Jul 27, 2013 6:29 am

My spud gun shoot but the combustion in the chamber is very
rare and i want injecte comburant on my chamber but i don't
Know how to with h2o2 35% or with pure oxygen bottle or with simple
bike pump inject exterioor air in chamber ?
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 27, 2013 8:42 am

Quelle est votre système d'allumage, peut-on le voir?
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Unread postAuthor: romelectrofr » Sat Jul 27, 2013 11:50 am

J'utilise un simple allumage de flash d'appareil photo il fonctionne 10
fois sur 10 le probleme ne provient pas de l'allumage je pense

i use an flash allumage he is very good this is don't the problem
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 27, 2013 12:19 pm

how big is your spark gap?
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Unread postAuthor: romelectrofr » Sat Jul 27, 2013 6:16 pm

Sorry i don' understand sorry for my english
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Unread postAuthor: jackssmirkingrevenge » Sat Jul 27, 2013 7:30 pm

Quelle est la distance entre vos électrodes?
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Unread postAuthor: romelectrofr » Sun Jul 28, 2013 5:14 pm

Environ 2mm

2mm
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Unread postAuthor: jackssmirkingrevenge » Sun Jul 28, 2013 9:55 pm

Trop petit! Try 5mm and see if you get more reliable firing :)
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