Mailing List flyrotary@lancaironline.net Message #2646
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Safety: LED on EC2 and Power from injectors
Date: Thu, 21 Aug 2003 08:43:53 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
 
----- Original Message -----
Sent: Thursday, August 21, 2003 3:03 AM
Subject: [FlyRotary] Safety: LED on EC2 and Power from injectors

Thanks, Tracy, that’s a big relief.  However, today I was thinking about that.  It means that if you have your injectors and coils on the main bus like I do, then the “magnetos” are hot whenever the main bus is turned on.  This could in theory lead to the engine firing if the prop is turned a little with the main buss on – like pushing the plane around at night with the lights on etccc…  Something to be careful of – although I really like the additional source of potential power.

 

David Leonard

The Rotary Roster:

http://members.aol.com/_ht_a/rotaryroster/index.html

 

 

David, If I recall my conversation with Tracy correctly about the topic of inadvertent starting of the engine, I don't think you need to worry.  Tracy has designed a minimum rpm value in the code  necessary before the EC2 will produce the signal to trigger the ignition modules.  If I recall correctly this is around 150 rpm and I believe that speed has to be maintained for at least two revolutions of the eccentric shaft.  I may be incorrect on the details, but essential there is a safety feature.  So, it would seem unlikely that pushing the plane around by the prop would trigger a firing. Tracy does a pretty thorough job of thinking out a design.

 

Ed Anderson

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