Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 65 users online :: 5 registered, 0 hidden and 60 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Peizo, sparker or 9V?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Peizo, sparker or 9V?

Unread postAuthor: dan-27 » Thu Oct 28, 2010 4:57 am

Hi there. I'm having some issues with my spudgun (My first!)

I started by using a peizo sparker from a gas fire, this worked really well arcing about strongly with 1/8" - 1/2" gaps. The problems began when the antiperspirant went into the chamber, then I think it coated the electrodes in something but for whatever reason it wouldn't spark or cause ignition.

So I moved on to a lantern sparker, this worked really well and we launched some spuds & apples. But I get about 30 sparks before the flint needs changing which requires dismantling the whole gun. On top of that it rusted terribly, so much so that the spring gets stuck and wont push the flint.

So now I'm looking for a third method of ignition. I don't really want to spend too much money if possible, and the weight involved with using an ignition system from a car isn't too appealing. I have been looking at the $22 9V igniter's on http://ultimatespudgun.com. How well do these work, how easy are they to fit and how often does it require maintenance / new batteries.

All advice appreciated.

Thanks a lot

Dan
  • 0


dan-27
Private
Private
 
Posts: 3
Joined: Fri Sep 10, 2010 10:29 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Thu Oct 28, 2010 5:11 am

It seems a shame to compensate for poor fuel choice by changing the ignition, have you tried starting fluid, or syringe metering from a gas burner or lighter refill butane?

Image

Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Hubb » Thu Oct 28, 2010 6:25 am

Like ^ stated, I'd change the fuel before changing the sparking system again. My current cannon has seen over 100 shots off of the same piezo sparker now, simply because I'm using a better fuel. My spray-n-pray saw about the same number yours did.
  • 0

User avatar
Hubb
Major General
Major General
 
Posts: 2390
Joined: Mon May 28, 2007 8:39 am
Location: South Georgia
Reputation: 2

Unread postAuthor: motorfixer1 » Thu Oct 28, 2010 5:13 pm

You might want to search a little more before asking questions. However you might look at your local hardware store for a single AA grill igniter. Should run you around $15usd. If you still want to use spray fuels, you might try something that contains no water and leaves no residue, that's all I can tell you about spray fuels. Your electrodes should most certianly be stainless to prevent the corrosion on top of better fuel choices.
  • 0


motorfixer1
Sergeant
Sergeant
 
Posts: 91
Joined: Wed Jul 07, 2010 5:28 pm
Reputation: 0

Unread postAuthor: Zeus » Thu Oct 28, 2010 10:35 pm

Powered igniters are the way to go, and the triggers can be a lot nicer.

Also shorten your spark gap so it will allways fire, have the gap half the length of the maximum spark that the igniter will create. That ensures reliable ignition.
  • 0

/sarcasm, /hyperbole
User avatar
Zeus
Major General
Major General
 
Posts: 1422
Joined: Tue Oct 27, 2009 7:34 pm
Location: 'Straya, C*nt
Reputation: 2

Unread postAuthor: dan-27 » Fri Oct 29, 2010 2:25 am

Thank you all. I shall revert back to the piezo and try different fuel types.

Thanks

Dan
  • 0


dan-27
Private
Private
 
Posts: 3
Joined: Fri Sep 10, 2010 10:29 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Fri Oct 29, 2010 6:01 am

Good man, have a read through the Image and if you need further advice just ask if the search feature doesn't satisfy your request.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Sponsored

Sponsor
 


Return to Combustion Cannon Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'