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Message-ID: <5cf132c0802060924y1e67f358h3d86ee420a4bada5@mail.gmail.com>
Date: Wed, 6 Feb 2008 11:24:46 -0600
From: "Mark Steitle" <msteitle@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: 20B rotors / Renesis sensor wiring change
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Al,
I would love to see 9.5 gph in cruise.  The very best I've been able to get
was about 12 gph.  No, haven't followed the procedure spelled out in the
EM-2 manual.  But the "fuel remaining" after adding fuel is pretty close to
what the fuel gauges show.  I know this isn't very accurate, but it will
have to do until I do the formal calibration.

Tracy gave me a rule-of-thumb for fuel burn.  He said the rotary will burn
about 10 gph per 100 hp (.60 bsfc).  Based on that rule-of-thumb, I would
expect to see about 26-30 gph during full throttle, high rpm operations.  I
know this is a very simplistic analysis, but it seems to be in line with
other engines in this hp range.

Mark




On 2/6/08, Al Gietzen <ALVentures@cox.net> wrote:
>
>
>
> Yes, the 20B can be a thirsty beast.  My EM-2 registers 26gph on
> initial climb.  It will drop down to 12.5 - 16 gph in cruise, depending on
> MAP, prop speed and mixture.
>
> Mark
>
>
>
> Mark;
>
>
>
> Have you done EM2 calibration checks against measured fuel use?  I ask
> because I see about 20 gph on climb out and cruise at about 9.5 gph at
> 5300-5400 rpm.  Last check showed the measured fuel and EM2 agreeing pretty
> closely.
>
>
>
> Al
>

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<div>Al, </div>
<div>I would love to see 9.5 gph in cruise.&nbsp; The very best I&#39;ve been able to get was about 12 gph.&nbsp; No, haven&#39;t followed the procedure spelled out in the EM-2 manual.&nbsp; But the &quot;fuel remaining&quot; after adding fuel is pretty close to what the fuel gauges show.&nbsp; I know this isn&#39;t very accurate, but it will have to do until I do the formal calibration.&nbsp; </div>

<div>&nbsp;</div>
<div>Tracy&nbsp;gave me a&nbsp;rule-of-thumb for fuel burn.&nbsp; He&nbsp;said&nbsp;the rotary will burn about 10 gph per 100 hp (.60 bsfc).&nbsp; Based on that rule-of-thumb, I would expect to see about 26-30 gph&nbsp;during full throttle, high rpm operations.&nbsp; I know this is a very simplistic analysis, but it seems to be in line with other engines in this hp range.</div>

<div>&nbsp;</div>
<div>Mark</div>
<div>&nbsp;</div>
<div>&nbsp; <br><br>&nbsp;</div>
<div><span class="gmail_quote">On 2/6/08, <b class="gmail_sendername">Al Gietzen</b> &lt;<a href="mailto:ALVentures@cox.net">ALVentures@cox.net</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" vlink="blue" link="blue">
<div>
<p style="MARGIN-LEFT: 0.5in"><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">&nbsp;</span></font></p>
<div>
<p><font face="Times New Roman" size="3"><span style="FONT-SIZE: 12pt">Yes, the 20B can be a thirsty beast.&nbsp;&nbsp;My EM-2 registers 26gph on initial&nbsp;climb.&nbsp; It will drop down to 12.5&nbsp;- 16 gph in cruise, depending on MAP, prop speed&nbsp;and mixture.</span></font></p>
</div>
<div>
<p><font face="Times New Roman" color="black" size="3"><span style="FONT-SIZE: 12pt; COLOR: black">Mark</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Mark;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Have you done EM2 calibration checks against measured fuel use?&nbsp; I ask because I see about 20 gph on climb out and cruise at about 9.5 gph at 5300-5400 rpm.&nbsp; Last check showed the measured fuel and EM2 agreeing pretty closely.</span></font></p>

<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">&nbsp;</span></font></p>
<p><font face="Verdana" color="blue" size="2"><span style="FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: Verdana">Al</span></font></p></div></div></div></blockquote></div><br>

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