---------------------------------------------------------- Commander-List Digest Archive --- Total Messages Posted Sat 08/29/09: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:32 AM - Simulated single-engine settings (Tom Fisher) 2. 12:33 PM - Re: Simulated single-engine settings (nico css) 3. 12:56 PM - Re: Simulated single-engine settings (John Vormbaum) 4. 01:11 PM - Re: Simulated single-engine settings (white_rhino_ps@yahoo.com) 5. 05:30 PM - Re: Simulated single-engine settings (Donnie Rose) 6. 06:32 PM - Re: Simulated single-engine settings (Chris) 7. 07:15 PM - Re: Simulated single-engine settings (BobsV35B@aol.com) 8. 08:09 PM - Re: Simulated single-engine settings (Tom Fisher) 9. 10:07 PM - basics (Donnie Rose) ________________________________ Message 1 _____________________________________ Time: 10:32:38 AM PST US From: "Tom Fisher" Subject: Commander-List: Simulated single-engine settings Folks, I'm going to do some single-engine work but I am not sure what the numbers should be for MAP & RPM that I should use to simulate a feathered engine environement. Tom C-GISS 680FLP (Mr.RPM) ________________________________ Message 2 _____________________________________ Time: 12:33:29 PM PST US From: "nico css" Subject: RE: Commander-List: Simulated single-engine settings I remember 17" and 2300 on a direct drive engine. Could be wrong. I don't know if those settings will keep a geared motor out of trouble, though. _____ From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Tom Fisher Sent: Saturday, August 29, 2009 10:33 AM Subject: Commander-List: Simulated single-engine settings Folks, I'm going to do some single-engine work but I am not sure what the numbers should be for MAP & RPM that I should use to simulate a feathered engine environement. Tom C-GISS 680FLP (Mr.RPM) ________________________________ Message 3 _____________________________________ Time: 12:56:51 PM PST US From: "John Vormbaum" Subject: RE: Commander-List: Simulated single-engine settings I thought I used around 13" and 2300 or so on my 500B direct-drive engines. I don't know if those settings will yield zero-thrust on an IO-720 though... _____ From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of nico css Sent: Saturday, August 29, 2009 12:31 PM Subject: RE: Commander-List: Simulated single-engine settings I remember 17" and 2300 on a direct drive engine. Could be wrong. I don't know if those settings will keep a geared motor out of trouble, though. _____ From: owner-commander-list-server@matronics.com [mailto:owner-commander-list-server@matronics.com] On Behalf Of Tom Fisher Sent: Saturday, August 29, 2009 10:33 AM Subject: Commander-List: Simulated single-engine settings Folks, I'm going to do some single-engine work but I am not sure what the numbers should be for MAP & RPM that I should use to simulate a feathered engine environement. Tom C-GISS 680FLP (Mr.RPM) href="http://www.matronics.com/Navigator?Commander-List">http://www.matronic s.com/Navigator?Commander-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 4 _____________________________________ Time: 01:11:32 PM PST US Subject: Re: Commander-List: Simulated single-engine settings From: white_rhino_ps@yahoo.com I use 18" and 2600 rpm on my IGO 540's Craig Sent via BlackBerry by AT&T -----Original Message----- From: "nico css" Subject: RE: Commander-List: Simulated single-engine settings This is a multi-part message in MIME format. ________________________________ Message 5 _____________________________________ Time: 05:30:39 PM PST US From: Donnie Rose Subject: Re: Commander-List: Simulated single-engine settings I use 22" and 2300 rpm thereabouts=0A-=0ADonnie Rose =0A205/492-8444=0A =0A=0A=0A=0A=0A________________________________=0AFrom: John Vormbaum =0ATo: commander-list@matronics.com=0ASent: Saturday, August 29, 2009 2:47:20 PM=0ASubject: RE: Commander-List: Simulated single-engine settings=0A=0A=0AI thought I used around 13" and 2300 or so on my 500B dire ct-drive engines. I don't know if those settings will yield zero-thrust on an IO-720 though...=0A=0A=0A________________________________=0AFrom: owner- commander-list-server@matronics.com [mailto:owner-commander-list-server@mat ronics.com] On Behalf Of nico css=0ASent: Saturday, August 29, 2009 12:31 P M=0ATo: commander-list@matronics.com=0ASubject: RE: Commander-List: Simulat ed single-engine settings=0A=0A=0AI remember 17" and 2300 on a direct drive engine. Could be wrong. I don't know if those settings will keep a geared motor out of trouble, though. =0A-=0A=0A=0A______________________________ __=0AFrom: owner-commander-list-server@matronics.com [mailto:owner-commande r-list-server@matronics.com] On Behalf Of Tom Fisher=0ASent: Saturday, Augu st 29, 2009 10:33 AM=0ATo: commander-list@matronics.com=0ASubject: Commande r-List: Simulated single-engine settings=0A=0A=0AFolks,=0A-=0AI'm going t o do some single-engine work but I am not sure what the numbers should be f or MAP & RPM-that I should use to simulate a feathered engine environemen t.=0A-=0ATom=0AC-GISS=0A680FLP (Mr.RPM)=0A-=0A=0A=0Ahref="http://www. matronics.com/Navigator?Commander-List">http://www.matronics.com/Navigator? Commander-Listhref="http://forums.matronics.com">http://forums.matronics. com=0Ahref="http://www.matronics.com/contribution">http://www.matronics.c om/c=0A=0A=0A=0Ahref="http://www.matronics.com/Navigator?Commander-List"> http://www.matronics.com/Navigator?Commander-List=0Ahref="http://forums.m atronics.com">http://forums.matronics.com=0Ahref="http://www.matronics.co ===========0A=0A=0A ________________________________ Message 6 _____________________________________ Time: 06:32:30 PM PST US From: Chris Subject: Re: Commander-List: Simulated single-engine settings Donnie Rose wrote: > I use 22" and 2300 rpm thereabouts For simulated zero thrust?!? That's a LOT more than zero thrust on most direct drive engines. Chris ________________________________ Message 7 _____________________________________ Time: 07:15:01 PM PST US From: BobsV35B@aol.com Subject: Re: Commander-List: Simulated single-engine settings Good Evening Chris and All, I agree with Chris in that 22' and 2300 sounds way high to me. However, I do not think there is a canned number that can be used. Too many variables. What I would suggest is that you set the RPM at a low number that feels smooth. Somewhere between 2000 and 2300 RPM. Then, throttle back until the RPM drops out of the governing range. Follow that by adding enough MP to make the RPM get back up to the governing range. Choose a MP that is about an inch below what it took to get to the governing range. That will be close enough to zero thrust for the particular weight, configuration, and speed at which the airplane is flying. Still just a WAG, but close enough for anyone's purpose. There ARE valid reasons to use a higher power for a few training purposes just as there are valid reasons to use a lower power. Once again, too many variables to discuss in this forum, but the method described previously will get awfully close to whatever performance would be available with the propellor actually feathered. If someone tells you that you must use such and such a number, all they are telling you is that they do NOT know what they are talking about!! Happy Skies, Old Bob AKA Bob Siegfried Stearman N3977A Brookeridge Air Park, Downers Grove, Illinois In a message dated 8/29/2009 8:33:11 P.M. Central Daylight Time, cschuerm@cox.net writes: --> Commander-List message posted by: Chris Donnie Rose wrote: > I use 22" and 2300 rpm thereabouts For simulated zero thrust?!? That's a LOT more than zero thrust on most direct drive engines. Chris ________________________________ Message 8 _____________________________________ Time: 08:09:35 PM PST US From: "Tom Fisher" Subject: Re: Commander-List: Simulated single-engine settings Thanks Bob, that was a flurry of answers, I like your method. Tom C-GISS 680FLP (Mr.RPM) ----- Original Message ----- From: BobsV35B@aol.com To: commander-list@matronics.com Sent: Saturday, August 29, 2009 7:13 PM Subject: Re: Commander-List: Simulated single-engine settings Good Evening Chris and All, I agree with Chris in that 22' and 2300 sounds way high to me. However, I do not think there is a canned number that can be used. Too many variables. What I would suggest is that you set the RPM at a low number that feels smooth. Somewhere between 2000 and 2300 RPM. Then, throttle back until the RPM drops out of the governing range. Follow that by adding enough MP to make the RPM get back up to the governing range. Choose a MP that is about an inch below what it took to get to the governing range. That will be close enough to zero thrust for the particular weight, configuration, and speed at which the airplane is flying. Still just a WAG, but close enough for anyone's purpose. There ARE valid reasons to use a higher power for a few training purposes just as there are valid reasons to use a lower power. Once again, too many variables to discuss in this forum, but the method described previously will get awfully close to whatever performance would be available with the propellor actually feathered. If someone tells you that you must use such and such a number, all they are telling you is that they do NOT know what they are talking about!! Happy Skies, Old Bob AKA Bob Siegfried Stearman N3977A Brookeridge Air Park, Downers Grove, Illinois In a message dated 8/29/2009 8:33:11 P.M. Central Daylight Time, cschuerm@cox.net writes: Donnie Rose wrote: > I use 22" and 2300 rpm thereabouts For simulated zero thrust?!? That's a LOT more than zero thrust on most direct drive ===================== ======================= - MATRONICS WEB FORUMS ======================= - List Contribution Web Site sp; ------------------------------------------------------------------------- ----- ________________________________ Message 9 _____________________________________ Time: 10:07:45 PM PST US From: Donnie Rose Subject: Commander-List: basics I know this will draw critcism,-but pilotage based on circumstance is how you do it.=0A-=0ADonnie Rose =0A205/492-8444=0A=0A=0A=0A ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message commander-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Commander-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/commander-list Browse Digests http://www.matronics.com/digest/commander-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.