Mailing List flyrotary@lancaironline.net Message #17605
From: Bartrim, Todd <Steve.Bartrim@canfor.com>
Subject: RE: [FlyRotary] Re: Digital Fuel Monitoring System / EC2 Primer function
Date: Mon, 21 Feb 2005 13:44:17 -0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Excellent work Tracy;
    I just received my DPDT mom-on push button switch (I'm surprised that these aren't really that common) for the primer circuit I was going to install on my EC2 as discussed earlier, but hadn't actually installed it yet. 
    But your solution is a little more elegant, so I'll definitely upgrade. I'll be happy to report it's effectiveness in our weather, however spring is coming early this year and I rode my motorbike to work today, so it looks like the coldest part it over.
 
Todd

I have never run into the cold start problems that some builders have mentioned but Ed did show me that it can happen on a cold morning, even in Florida.  I finally got around to adding a primer function to the EC2 code and it will be incorporated in all future EC2s.  If any of you cold climate builders feel the need, a chip swap can get this function in earlier EC2s.  Contact me via email.
 
It works like this:
 
When the engine is not running and the mode select switch is set to zero, pushing the Store switch will give a 10 ms shot on all 4 injectors.  How many shots are required for a really cold start will depend on manifold design, temperature, injector position, etc, and will have to be determined experimentally.
 
Tracy
 
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