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Date: Sun, 15 May 2011 18:02:26 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Starter abuse.
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On 05/15/2011 09:36 AM, Mark Steitle wrote:
> Congrats Ernest.  If you're like me, it will take a little practice 
> before you have the starting technique down.  It will vary with OAT 
> and whether it is a hot start or a cold start.  On my setup and when 
> the OAT is low and doing an initial start, I typically use 2-3 primer 
> shots with the mixture set to full-rich.  If it starts and dies, I'll 
> give it another 1-2 primer shots.  If I'm doing a cold start, but 
> weather is warmer, I'll use 1-2 primer shots but only go to about 3 
> o'clock on the mixture.  On a hot start, I'll leave the mixture alone 
> and maybe give it only 1 primer shot.  It takes a little practice, but 
> not nearly as difficult as doing a hot-start on a Lycoming.  Of 
> course, this assumes the EC-2 is tuned properly and injectors are 
> working like they should.
>
> Loved the YouTube video.  Keep us up on future runs.
>
> Mark


I'm not using the EC-2, Mark.  The MegaSquirt takes a measurement of the 
temperature, and uses that to pull an enrichment value from a 
programmable look-up table.  It's exactly what you're doing, just under 
computer control.

I cut 10* off the advance, and set the "required fuel" parameter to 
correspond to the 450cc/min injectors I have (instead of the 550cc/min I 
don't have), and gave it another go today.  It fired right up and reved 
up to 4,000RPM, where I have the rev limiter set.  It would run for 
several seconds and then die.  I did it repeatedly.  Enough to get the 
muffler uncomfortably hot to the touch.  I have the data logs,  so I'll 
be able to get a handle on what the engine wants and move to a decent 
idle in short order.