taiwanluthiers Posted January 27, 2015 Share Posted January 27, 2015 Where can I find some information on making conductive primers for igniters as well as the pyrogen to ignite composite motors? I have potassium perchlorate, some parlon, and barium nitrate... Link to comment Share on other sites More sharing options...
FlaMtnBkr Posted January 28, 2015 Share Posted January 28, 2015 The internet? You really need conductive lampblack for it to work well. Supposedly graphite can work but I couldn't get them to work well. A capacitive discharge type box might get them to fire more reliably or maybe I never got the right amount of graphite needed. Flakes probably work better than a powder. Link to comment Share on other sites More sharing options...
dagabu Posted January 28, 2015 Share Posted January 28, 2015 Pyrogen Search Link to comment Share on other sites More sharing options...
taiwanluthiers Posted January 28, 2015 Author Share Posted January 28, 2015 I have googled, but I haven't really found anything good. I'm just thinking of soldering up bridge wires and then dipping it in a MgAl based star comp (bound with Parlon) such as Emerald green or Buell red. Hopefully they burn hot enough to ignite APCP motors. Link to comment Share on other sites More sharing options...
dagabu Posted January 28, 2015 Share Posted January 28, 2015 http://www.amateurpyro.com/forums/topic/10391-electric-lift-igniters/?hl=pyrogen&do=findComment&comment=138041 http://www.amateurpyro.com/forums/topic/7684-pyrogen/?hl=pyrogen http://www.amateurpyro.com/forums/topic/6185-need-a-new-ignition-system-semi-newbie/page-2?hl=pyrogen&do=findComment&comment=80060 http://www.amateurpyro.com/forums/topic/6006-boron-matchhead-success/?hl=pyrogen http://www.amateurpyro.com/forums/topic/5540-alice/?hl=pyrogen&do=findComment&comment=74717 Link to comment Share on other sites More sharing options...
Arthur Posted January 28, 2015 Share Posted January 28, 2015 DIY igniters are usually rather insensitive to ignition and unreliable. If you have any possibility of getting the commercial part then please do. Link to comment Share on other sites More sharing options...
taiwanluthiers Posted January 29, 2015 Author Share Posted January 29, 2015 (edited) Actually most composite motor igniters are rather insensitive, they require at least 1 amp to fire reliably. The requirement is that it produces a very HOT flame for a long time to bring the motor up to pressure. E matches are not good for this because if you hook it up to most commercial rocket launch controllers, the continuity test would fire it! Also the large chip means the possibility of a CATO due to the nozzle becoming obstructed. E matches have its uses, mostly for air starting motors (ie. staging) but I don't think their pyrogen is strong enough to ignite composite motors without being augmented with something... I read about thermalite being used but you also need a ATFE license to have it too. I'm actually thinking metal fueled star comp should work... Edited January 29, 2015 by taiwanluthiers Link to comment Share on other sites More sharing options...
chand Posted March 25, 2015 Share Posted March 25, 2015 How can I make ignitor but ignitor should ignite the large motor Link to comment Share on other sites More sharing options...
yelloj Posted April 15, 2015 Share Posted April 15, 2015 I have been making conductive igniters using powdered graphite with great success for quite a few years. I use them to ignite High power sugar rocket motors. My method is fleshed out on my web site: ajolleyplace.com/Igniters Link to comment Share on other sites More sharing options...
FlaMtnBkr Posted April 15, 2015 Share Posted April 15, 2015 That link isn't working for me FYI. Link to comment Share on other sites More sharing options...
MrB Posted April 15, 2015 Share Posted April 15, 2015 That link isn't working for me FYI.I think this is what he aimed for.B! Link to comment Share on other sites More sharing options...
chand Posted April 18, 2015 Share Posted April 18, 2015 Guys you place your ignitor in deep inside motor or at nozzle end except the este motor Link to comment Share on other sites More sharing options...
FlaMtnBkr Posted April 18, 2015 Share Posted April 18, 2015 Thanks B. I looked around the site but didn't find it. As for Ignitor placement, if your fuel is weak and you are trying to spice it up put it all the way in. If your fuel is hot and your motor is on the edge of blowing up Then put it just in by the nozzle. Hope that makes sense. Link to comment Share on other sites More sharing options...
chand Posted April 19, 2015 Share Posted April 19, 2015 My propellant is knsuMeans surcose based Link to comment Share on other sites More sharing options...
Recommended Posts