Mailing List flyrotary@lancaironline.net Message #25223
From: Tracy Crook <lors01@msn.com>
Subject: Re: [FlyRotary] Re: Tracy's Coil Order
Date: Thu, 21 Jul 2005 10:47:20 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bill, Most modern ignition systems are migrating to an integral coil/igniter module rather than a separate igniter near the coil or in the ECU.  The igniter refers to the module that switches the high current on and off to charge & fire the coil.  This was the job done by points and capacitors back in the dark ages.   
 
The LS-1 and the Renesis have the igniter built as a single module.  The ECU just sends a logic level signal to the igniter to tell it to turn on & off.   This is the reason I keep having to say "no" to builders who ask me if they can use these really nifty "insert brand here" coils they have laying around the shop.
 
Tracy  (going down to hangar to test new coil & razor sharp wingtips)
 
 
Subject: [FlyRotary] Re: Tracy's Coil Order

 
Santa just arrived in a big brown truck, got my coils.  I ordered from Rockauto.com.   Not super fast but dependable and fair pricing. 
 
It was my fault for not having a spare on hand - dumb.  Never had an actual coil/igniter failure before if you don't count the ballast resistor failure on my early 2nd gen installation.  They are generally very reliable.  I'm wondering if I have them located in a 'too hot' location.  I used a blast tube on the 2nd gen coils but thought that I was being too conservative so deleted that on the Renesis installation.  May have been a mistake. 
 
Tracy  (installing temperature probe near coils to measure temp in-flight)
 
Tracy, Pardon my ignorance but what is the ignitor? The coil I understand, is it a capacitor or other device?
Bill Jepson
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