X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <rwstracy@gmail.com> Received: from mail-qy0-f200.google.com ([209.85.221.200] verified) by logan.com (CommuniGate Pro SMTP 5.3.2) with ESMTP id 4119883 for flyrotary@lancaironline.net; Wed, 10 Feb 2010 15:51:47 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.200; envelope-from=rwstracy@gmail.com Received: by qyk38 with SMTP id 38so375772qyk.1 for <flyrotary@lancaironline.net>; Wed, 10 Feb 2010 12:51:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=MWa3Le35GIdAX3ED8VSv4uXpmGIiJyR9MkX0Pelz1VY=; b=XTYV/EOZKQanEAGk+tqre8TCCkYeGlqY4mQhoop3/4WbslpNc9obL9Oj4FRuivTsNS xinkedudjml4n63xfl9Xocg3gkRgLDJ9nGWX/Uf8+Z09s2F9j0P7MUJRs5QEEuKfSyQA 28ytd3VxRwjW7gFj5Rr+j3dAxCPCsffIoVclc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=eR1l7pXeChtTBRY2ndxTmWT1JkupxjMbtMambE1Ow41PqSpUKvQH4jwqUqnvZ4wqT2 Weqqv/0xCCRvYZREzKYgW3Uvy+t7KllijPdcp+0EP6qpZUjI/kEaRrIVeei0X4XvL5Q1 uiCQYzfaRCWUKDumSZCLeujENhJzGba9FupDQ= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.63.133 with SMTP id b5mr449747qai.350.1265835072288; Wed, 10 Feb 2010 12:51:12 -0800 (PST) In-Reply-To: <list-4119865@logan.com> References: <list-4119865@logan.com> Date: Wed, 10 Feb 2010 15:51:12 -0500 X-Google-Sender-Auth: 5184197f22acf69c Message-ID: <1b4b137c1002101251w21b1ec99tff498ee88f9d1902@mail.gmail.com> Subject: Re: [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A. Renesis to turbo From: Tracy Crook <tracy@rotaryaviation.com> To: Rotary motors in aircraft <flyrotary@lancaironline.net> Content-Type: multipart/alternative; boundary=00c09f99e122d3f8df047f453151 --00c09f99e122d3f8df047f453151 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I won a pretty good bet on that logic once. The flaw is that an airfoil (= a prop is an airfoil) generates lift (or thrust in this case) at zero angle o= f attack due to mr Bernoulli's stuff. Trying to calculate airspeed based on those pitch numbers is a waste of time if all you have is that numerical pitch number which is usually based on the angle at the flat side of the airfoil. But then again, no 2 prop makers define it the same way. Tracy On Wed, Feb 10, 2010 at 3:27 PM, Jeff Whaley <jwhaley@datacast.com> wrote: > Hey Tracy, you=92re doing better than theoretical =85 > > 6300 engine rpm / 2.17 =3D 2903.225 prop rpm > > 2903.225 prop rpm x 60 =3D 174193.548 prop rph (revs per hour) > > 174193.548 rph x 71 inch pitch =3D 12367741.935 inches of forward travel = per > hour > > 12367741.935=94 / 12 =3D 1030645.131 feet per hour > > 1030645.161 fph / 5280 =3D 195.2 mph > > Your 209 mph appears to be better than best theoretical =85 > > 209 / 195.2 =3D 1.07; > > 1.07 x 2903.225 =3D 3108 prop rpm / or 1.07 x 71 =3D 75.97 inch pitch = =85 the > following table from Warp Drive gives same numbers. > > 210 mph at 2900 rpm requires 76=94 pitch; or conversely 210 mph at 71=94 = pitch > requires 3100 rpm. > > Jeff > > > > > > *Prop RPM* > > *Cruise Air Speed* > > *2600* > > *2700* > > *2800* > > *2900* > > *3000* > > *3100* > > *3200* > > *3300* > > *3400* > > *3500* > > *3600* > > *3700* > > *3800* > > *3900* > > *4000* > > *4100* > > *4200* > > *220* > > 89 > > 86 > > 83 > > 80 > > 77 > > 75 > > 73 > > 70 > > 68 > > 66 > > 65 > > 63 > > 61 > > 60 > > 58 > > 56 > > 55 > > *210* > > 85 > > 82 > > 79 > > 76 > > 74 > > 71 > > 69 > > 67 > > 65 > > 63 > > 62 > > 60 > > 58 > > 57 > > 55 > > 54 > > 53 > > *200* > > 81 > > 78 > > 75 > > 72 > > 70 > > 68 > > 66 > > 65 > > 62 > > 61 > > 59 > > 57 > > 56 > > 54 > > 53 > > 51 > > 50 > > *190* > > 77 > > 74 > > 72 > > 69 > > 67 > > 65 > > 63 > > 61 > > 59 > > 57 > > 56 > > 54 > > 53 > > 51 > > 50 > > 49 > > 48 > > *180* > > 73 > > 70 > > 68 > > 66 > > 63 > > 61 > > 59 > > 58 > > 56 > > 54 > > 53 > > 52 > > 50 > > 49 > > 48 > > 46 > > 45 > > > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Tracy Crook > *Sent:* Wednesday, February 10, 2010 8:35 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A= . > Renesis to turbo > > > > Sun 100 flown at 500 ft. > Top speed on a normally aspirated aircraft is always best at sealevel. > Best fuel economy is reached up high. > > Tracy > > On Tue, Feb 9, 2010 at 10:45 PM, Mike Wills <rv-4mike@cox.net> wrote: > > When you guys put out these numbers (RPM, speed, etc...) would also be > helpful to know at what altitude. I assume at or close to sea level? I > havent yet made any speed runs at low altitude. > > > > Mike > > > > *From:* Tracy Crook <tracy@rotaryaviation.com> > > *Sent:* Tuesday, February 09, 2010 5:27 PM > > *To:* Rotary motors in aircraft <flyrotary@lancaironline.net> > > *Subject:* [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: N.A= . > Renesis to turbo > > > > Tracy, if you have the data could you give us the RPMs you saw at the 20= 5 > and 217.5 air speeds? > > Dennis H. > Renesis RV-7A > Austin, Tx. > > That was 209 and 217.5 > > the 209 mph speed was with the 2.176 drive turning a 68 - 71 prop with > engine turning 6300 , mixture leaned to 17 gph. On other occasions I cou= ld > push it to 6400 at best power mixture burning 20 gph. > > The 217.5 mph was with a 2.85 drive turning a 74 - 88 prop with engine > turning 7250. I didn't get a good read on the fuel flow but obviously it > would have been higher. I remember requesting priority landing after the > race due to low fuel. > > Neither run was done at best power mixture but leaned a few gph less than > max. > > Tracy > > > > This message, and the documents attached hereto, is intended only for the > addressee and may contain privileged or confidential information. Any > unauthorized disclosure is strictly prohibited. If you have received this > message in error, please notify us immediately so that we may correct our > internal records. Please then delete the original message. Thank you. > --00c09f99e122d3f8df047f453151 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable I won a pretty good bet on that logic once.=A0=A0 The flaw is that an airfo= il (a prop is an airfoil) generates lift (or thrust in this case) at zero a= ngle of attack due to mr Bernoulli's stuff.=A0 Trying to calculate airs= peed based on those pitch numbers is a waste of time if all you have is tha= t numerical pitch number which is usually based on the angle at the flat si= de of the airfoil.=A0=A0 But then again, no 2 prop makers define it the sam= e way.<br> <br>Tracy<br><br><div class=3D"gmail_quote">On Wed, Feb 10, 2010 at 3:27 PM= , Jeff Whaley <span dir=3D"ltr"><<a href=3D"mailto:jwhaley@datacast.com"= >jwhaley@datacast.com</a>></span> wrote:<br><blockquote class=3D"gmail_q= uote" style=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0= pt 0.8ex; padding-left: 1ex;"> <div link=3D"blue" vlink=3D"purple" lang=3D"EN-US"> <div> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">Hey Tracy, you=92re doing better than theoretical =85</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">6300 engine rpm / 2.17 =3D 2903.225 prop rpm</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">2903.225 prop rpm x 60 =3D 174193.548 prop rph (revs per hour)</span>= </p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">174193.548 rph x 71 inch pitch =3D 12367741.935 inches of forward tra= vel per hour</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">12367741.935=94 / 12 =3D 1030645.131 feet per hour</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">1030645.161 fph / 5280 =3D 195.2 mph</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">Your 209 mph appears to be better than best theoretical =A0=85 </span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">209 / 195.2 =3D 1.07;</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">1.07 x 2903.225 =3D 3108 prop rpm =A0/ or 1.07 x 71 =3D 75.97 inch pi= tch =85 the following table from Warp Drive gives same numbers.</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">210 mph at 2900 rpm requires 76=94 pitch; or conversely 210 mph at 71= =94 pitch requires 3100 rpm.</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">Jeff</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">=A0</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">=A0</span></p> <table style=3D"width: 525pt;" border=3D"1" cellpadding=3D"0" cellspacing= =3D"0" width=3D"700"> <tbody> <tr> <td colspan=3D"18" style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"> <b>Prop RPM</b></p> </td> </tr> <tr> <td style=3D"padding: 1.5pt; width: 38.45pt;" width=3D"51"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>Cr= uise Air Speed</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>26= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>27= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>28= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>29= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>30= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>31= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.65pt; -moz-background-clip: border; -moz-background-or= igin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>32= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>33= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>34= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>35= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>36= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>37= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>38= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>39= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>40= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>41= 00</b></p> </td> <td style=3D"padding: 1.5pt; background: rgb(255, 153, 102) none repeat scr= oll 0% 0%; width: 28.6pt; -moz-background-clip: border; -moz-background-ori= gin: padding; -moz-background-inline-policy: continuous;" width=3D"38"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>42= 00</b></p> </td> </tr> <tr> <td style=3D"padding: 1.5pt; background: rgb(255, 255, 128) none repeat scr= oll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -= moz-background-inline-policy: continuous;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>22= 0</b></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">89</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">86</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">83</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">80</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">77</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">75</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">73</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">70</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">68</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">66</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">65</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">63</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">61</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">60</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">58</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">56</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">55</p= > </td> </tr> <tr> <td style=3D"padding: 1.5pt; background: rgb(255, 255, 128) none repeat scr= oll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -= moz-background-inline-policy: continuous;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>21= 0</b></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">85</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">82</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">79</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><span= style=3D"background: yellow none repeat scroll 0% 0%; -moz-background-clip= : border; -moz-background-origin: padding; -moz-background-inline-policy: c= ontinuous;">76</span></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">74</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><span= style=3D"background: aqua none repeat scroll 0% 0%; -moz-background-clip: = border; -moz-background-origin: padding; -moz-background-inline-policy: con= tinuous;">71</span></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">69</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">67</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">65</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">63</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">62</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">60</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">58</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">57</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">55</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">54</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">53</p= > </td> </tr> <tr> <td style=3D"padding: 1.5pt; background: rgb(255, 255, 128) none repeat scr= oll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -= moz-background-inline-policy: continuous;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>20= 0</b></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">81</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">78</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">75</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">72</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">70</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">68</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">66</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">65</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">62</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">61</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">59</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">57</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">56</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">54</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">53</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">51</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">50</p= > </td> </tr> <tr> <td style=3D"padding: 1.5pt; background: rgb(255, 255, 128) none repeat scr= oll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -= moz-background-inline-policy: continuous;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>19= 0</b></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">77</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">74</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">72</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">69</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">67</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">65</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">63</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">61</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">59</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">57</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">56</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">54</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">53</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">51</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">50</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">49</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">48</p= > </td> </tr> <tr> <td style=3D"padding: 1.5pt; background: rgb(255, 255, 128) none repeat scr= oll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -= moz-background-inline-policy: continuous;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center"><b>18= 0</b></p> </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">73</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">70</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">68</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">66</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">63</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">61</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">59</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">58</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">56</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">54</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">53</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">52</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">50</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">49</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">48</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">46</p= > </td> <td style=3D"padding: 1.5pt;"> <p class=3D"MsoNormal" style=3D"text-align: center;" align=3D"center">45</p= > </td> </tr> </tbody> </table> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">=A0</span></p> <p class=3D"MsoNormal"><span style=3D"font-size: 11pt; color: rgb(31, 73, 1= 25);">=A0</span></p> <div style=3D"border-style: solid none none; border-color: rgb(181, 196, 22= 3) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium= ; padding: 3pt 0in 0in;"> <p class=3D"MsoNormal"><b><span style=3D"font-size: 10pt;">From:</span></b>= <span style=3D"font-size: 10pt;"> Rotary motors in aircraft [mailto:<a href= =3D"mailto:flyrotary@lancaironline.net" target=3D"_blank">flyrotary@lancair= online.net</a>] <b>On Behalf Of </b>Tracy Crook<br> <b>Sent:</b> Wednesday, February 10, 2010 8:35 AM<br> <b>To:</b> Rotary motors in aircraft<br> <b>Subject:</b> [FlyRotary] Re: rpm vs Power was : Throttle limits was Re: = N.A. Renesis to turbo</span></p> </div> <p class=3D"MsoNormal">=A0</p> <p class=3D"MsoNormal" style=3D"margin-bottom: 12pt;">Sun 100 flown at 500 = ft. <br> Top speed on a normally aspirated aircraft is always best at sealevel.=A0= =A0 Best fuel economy is reached up high.<br> <br> Tracy</p> <div> <p class=3D"MsoNormal">On Tue, Feb 9, 2010 at 10:45 PM, Mike Wills <<a h= ref=3D"mailto:rv-4mike@cox.net" target=3D"_blank">rv-4mike@cox.net</a>> = wrote:</p> <div name=3D"Compose message area"> <div> <p class=3D"MsoNormal"><span>When you guys put out these numbers (RPM, spee= d, etc...) would also be helpful to know at what altitude. I assume at or c= lose to sea level? I havent yet made any speed runs at low altitude.</span>= </p> </div> <div> <p class=3D"MsoNormal">=A0</p> </div> <div> <p class=3D"MsoNormal"><span>Mike</span></p> </div> <div> <div> <p class=3D"MsoNormal"><span style=3D"font-size: 10pt;">=A0</span></p> </div> <div> <div> <p class=3D"MsoNormal" style=3D"background: whitesmoke none repeat scroll 0= % 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-b= ackground-inline-policy: continuous;"><b><span style=3D"font-size: 10pt;">F= rom:</span></b><span style=3D"font-size: 10pt;"> <a href=3D"mailto:tracy@rotaryaviation.com" title=3D"tracy@rotaryaviation.c= om" target=3D"_blank"> Tracy Crook</a> </span></p> </div> <div> <p class=3D"MsoNormal" style=3D"background: whitesmoke none repeat scroll 0= % 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-b= ackground-inline-policy: continuous;"><b><span style=3D"font-size: 10pt;">S= ent:</span></b><span style=3D"font-size: 10pt;"> Tuesday, February 09, 2010= 5:27 PM</span></p> </div> <div> <div> <p class=3D"MsoNormal" style=3D"background: whitesmoke none repeat scroll 0= % 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-b= ackground-inline-policy: continuous;"><b><span style=3D"font-size: 10pt;">T= o:</span></b><span style=3D"font-size: 10pt;"> <a href=3D"mailto:flyrotary@lancaironline.net" title=3D"flyrotary@lancairon= line.net" target=3D"_blank"> Rotary motors in aircraft</a> </span></p> </div> <div> <p class=3D"MsoNormal" style=3D"background: whitesmoke none repeat scroll 0= % 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-b= ackground-inline-policy: continuous;"><b><span style=3D"font-size: 10pt;">S= ubject:</span></b><span style=3D"font-size: 10pt;"> [FlyRotary] Re: rpm vs = Power was : Throttle limits was Re: N.A. Renesis to turbo</span></p> </div> </div> </div> </div> <div> <p class=3D"MsoNormal">=A0</p> </div> <div> <div> <p class=3D"MsoNormal"><span style=3D"color: black;">Tracy, if you have the= data could you give us the=A0 RPMs you saw at the 205 and 217.5 air speeds= ?<br> <br> Dennis H. <br> Renesis RV-7A<br> Austin, Tx.<br> </span><br> That was 209 and 217.5=A0=A0=A0 <br> <br> the 209 mph speed was with the 2.176 drive turning a 68 - 71 prop with engi= ne turning 6300 , mixture leaned to 17 gph.=A0 On other occasions I could p= ush it to 6400 at best power mixture burning 20 gph.<br> <br> The 217.5 mph was with a 2.85 drive turning a 74 - 88 prop with engine turn= ing 7250.=A0 I didn't get a good read on the fuel flow but obviously it= would have been higher.=A0 I remember requesting priority landing after th= e race due to low fuel.=A0=A0 <br> <br> Neither run was done at best power mixture but leaned a few gph less than m= ax.<br> <br> Tracy</p> </div> </div> </div> </div> <p class=3D"MsoNormal">=A0</p> </div> <br> <font size=3D"1" color=3D"Black" face=3D"Arial">This message, and the docum= ents attached hereto, is intended only for the addressee and may contain pr= ivileged or confidential information. Any unauthorized disclosure is strict= ly prohibited. If you have received this message in error, please notify us immediately so that we may correct our = internal records. Please then delete the original message. Thank you.<br> </font> </div> </blockquote></div><br> --00c09f99e122d3f8df047f453151--