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From: Art Jensen <flycassutts@yahoo.com>
Reply-To: flycassutts@yahoo.com
Subject: RE: [LML] Re: Hartzell Prop Governor Low RPM Capability
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Valin,<br/><br/>I have a McCauley prop governor on my IO-550 with Hartzell prop, but cannot answer your question about it and an engine out situation.  Guess its time to find out!<br/><br/>Art<a href="https://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a>
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<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top">Valin,<br/><br/>I have a McCauley prop governor on my IO-550 with Hartzell prop, but cannot answer your question about it and an engine out situation.  Guess its time to find out!<br/><br/>Art<a href="https://overview.mail.yahoo.com?.src=iOS"><br/><br/>Sent from Yahoo Mail for iPad</a></td></tr></table>            <div id="_origMsg_">
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                            <b>
                                <span style="font-weight:bold">From:</span>
                            </b>
                            Thorn, Valin B. (JSC-VA411) &lt;valin.b.thorn@nasa.gov&gt;;                            <br>
                            <b>
                                <span style="font-weight:bold">To:</span>
                            </b>
                             &lt;lml@lancaironline.net&gt;;                                                                                                     <br>
                            <b>
                                <span style="font-weight:bold">Subject:</span>
                            </b>
                            [LML] Re: Hartzell Prop Governor Low RPM Capability                            <br>
                            <b>
                                <span style="font-weight:bold">Sent:</span>
                            </b>
                            Mon, Apr 21, 2014 3:43:52 PM                            <br>
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<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;">For Legacy flyers, what rate of descent do you see in engine out scenarios, at best glide speed (120 KIAS), in a clean configuration, with your prop
 pulled all the way back for minimum drag?&nbsp; </span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;">Particularly curious for those with feathering props, what descent rate do you have in this configuration with your prop feathered?</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;">Thanks,</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;">Valin Thorn</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
<p class="MsoNormal"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;"> Lancair Mailing List [mailto:lml@lancaironline.net]
<b>On Behalf Of </b>Valin &amp; Allyson Thorn<br>
<b>Sent:</b> Monday, March 24, 2014 8:06 PM<br>
<b>To:</b> lml@lancaironline.net<br>
<b>Subject:</b> [LML] Hartzell Prop Governor Low RPM Capability</span></p> 
<p class="MsoNormal"> &nbsp;</p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">I was surprised to learn recently that the Hartzell propeller governor (S Series) cannot adjust the blade pitch with an engine speed below about 1800
 rpm.&nbsp; Seems like that could be a problem in an engine out glide scenario, where the prop stays at flat pitch, high drag.</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">I talked to a guy at Hartzell Technical Support and he confirmed that&#8217;s how their S series governors work.&nbsp; He said it&#8217;s not a problem and that they
 are on all the Cirrus airplanes.&nbsp; But, with the Cirrus&#8217; single lever control linkage, I don&#8217;t think Cirrus pilots can adjust the blade pitch in an engine out scenario anyway.</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">For the Legacy flyers out there flying with the Hartzell governor, when you&#8217;re at best glide speed of 120 KIAS, are you able to get enough engine rpm
 to get maximum blade pitch (low drag) or not&#8230;?</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">Thanks,</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;"> &nbsp;</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">Valin Thorn</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">Legacy Project</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F4E79;">Boulder, Colorado USA</span></p> 
<p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D;"> &nbsp;</span></p> 
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