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Date: Thu, 06 Sep 2012 19:12:01 -0700
From: Cedric Gould <nghthwk@bellsouth.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Single lever control
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I think I'd be more interested in seeing these two plots with manifold 
pressure, rather than throttle position, plotted (same data).

-- 
Cedric Gould
Cozy MkIV S/N: 1515
Tehachapi, CA

On 9/6/2012 7:18 AM, Ernest Chrisltey wrote:
> This is what I was referring to in my previous email.  Throttle is
> graphed against RPM in both.  On the left, data points are colored based
> on coolant temps at the time the data point was captured.  The right
> graph uses AFR to set the color.
>
> The one on the left has the points colored according to coolant temp at
> the time the data point was collected. This graph tells me that a cold
> engine will make more power.
>
> The right graph has the points colored according to AFR, and is more
> interesting. My throttle plate is fully open at about 50% travel of the
> control lever.  My goal is to keep the mixture near cutoff lean until
> after the throttle plate is wide open. Until WOTP (wide open throttle
> plate) power increases from increasing the amount of intake charge.
> After that, pushing the lever forward increases power by enrichening the
> mixture.  I transition from changing the amount of mixture, to changing
> the makeup of it.   I would like a solid diagonal line, correlating
> throttle and RPM.  The graph shows me that I reach best power mixture to
> quickly.  I need to shift my target AFR a bit so that the lines flatten
> out with only 5% to 10% of lever travel left;  however, for the most
> part I've achieved the goal of having RPM directly correlated with
> throttle position.
>
>
> --
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