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First spudgun :) Needing ignition help

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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Unread postAuthor: Silentone » Tue Oct 21, 2008 2:56 pm

iisthemuffin wrote:
Silentone wrote:Right i've wired up the Piezo starter.. It sparks fine..

I put in the potato *grin* and did a 2 second spray of deodorant and put on the end cap.. Clicked the piezo but no joy, Any ideas?

Something i can do to make it work? Too much deodorant? Not strong enough spark?

Just toy with the amount of fuel you use. And also make sure the deoderant you are using is actully flamable. Alot of aerosol sprays arent.

Just start with a quick spray and then try to fire. If nothing happens try a little more or less until you get it right.

The deoderant im using contains alcohol, propane, butane which i think i need?

jackssmirkingrevenge wrote:
Silentone wrote:Something i can do to make it work? Too much deodorant? Not strong enough spark?

2 seconds sounds like far too much, half a second should suffice as your chamber is relatively small. Also, why deoderant when you can use propane or butane? if anything, use starting fluid ;)

Ill have a shop around and see if i can find it in a local store :)

Tried again with lower amount of deoderant, I think ill try another kind.. The spark is only around 1-3mm given off by the piezo
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Unread postAuthor: TurboSuper » Tue Oct 21, 2008 5:31 pm

You really have to play with the fuel mixture alot to get it to fire. Don't lose hope and keep at it, I had the same problem :wink:
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