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Simulated single-engine settings

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tfisher(at)commandergroup
Guest

Posted: Sat Aug 29, 2009 9:32 am Post subject: 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)

  

   [quote][b]

nico(at)cybersuperstore.c
Guest

Posted: Sat Aug 29, 2009 11:33 am Post subject: 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(at)matronics.com  [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of Tom  Fisher

Sent: Saturday, August 29, 2009 10:33 AM

To:  commander-list(at)matronics.com

Subject: 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)

  

[quote]



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[b]

John Vormbaum

Joined: 21 Aug 2006
Posts: 273
Location: SF Bay Area, CA

Posted: Sat Aug 29, 2009 11:56 am Post subject: 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(at)matronics.com  [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of nico  css

Sent: Saturday, August 29, 2009 12:31 PM

To:  commander-list(at)matronics.com

Subject: RE: 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(at)matronics.com  [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of Tom  Fisher

Sent: Saturday, August 29, 2009 10:33 AM

To:  commander-list(at)matronics.com

Subject: 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)

  

[quote]



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href="http://forums.matronics.com">http://forums.matronics.com

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[b]

white_rhino_ps(at)yahoo.c
Guest

Posted: Sat Aug 29, 2009 12:11 pm Post subject: Simulated single-engine settings

I use 18" and 2600 rpm on my IGO 540'sCraig

Sent via BlackBerry by AT&T

From:  "nico css" 

Date: Sat, 29 Aug 2009 12:31:01 -0700

To: <commander-list(at)matronics.com>

Subject: RE: Commander-List: Simulated single-engine settings

I remember 17" and 2300 on a direct drive = engine. Could be=20 wrong. I don't know if those settings will keep a geared motor out of = trouble,=20 though. 

 



From: = owner-commander-list-server(at)matronics.com=20 [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of =Tom=20 Fisher

Sent: Saturday, August 29, 2009 10:33 AM

To:=20 commander-list(at)matronics.com

Subject: Commander-List: = Simulated=20 single-engine settings



Folks,

 

I'm going to do some single-engine work but I am = not sure=20 what the numbers should be for MAP & RPM that I should use to = simulate=20 a feathered engine environement.

 

Tom

C-GISS

680FLP (Mr.RPM)

 

 	  Quote: 	
		    href=3D"http://www.matronics.com/Navigator?Commander-List">http://www.mat= ronics.com/Navigator?Commander-List href=3D"http://forums.matronics.com">http://forums.matronics.com href=3D"http://www.matronics.com/contribution">http://www.matronics.com/c=   _-=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D _-=3D          - The Commander-List Email Forum - _-=3D Use the Matronics List Features Navigator to browse _-=3D the many List utilities such as List Un/Subscription, _-=3D Archive Search & Download, 7-Day Browse, Chat, FAQ, _-=3D Photoshare, and much much more: _-=3D _-=3D   --> http://www.matronics.com/Navigator?Commander-List _-=3D _-=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D _-=3D               - MATRONICS WEB FORUMS - _-=3D Same great content also available via the Web Forums! _-=3D _-=3D   --> http://forums.matronics.com _-=3D _-=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D _-=3D             - List Contribution Web Site - _-=3D  Thank you for your generous support! _-=3D                              -Matt Dralle, List Admin. _-=3D   --> http://www.matronics.com/contribution _-=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

aquadiver99(at)yahoo.com
Guest

Posted: Sat Aug 29, 2009 4:30 pm Post subject: Simulated single-engine settings

I use 22" and 2300 rpm thereabouts

 

 Donnie Rose 

205/492-8444

  

 



 

   From: John Vormbaum <john(at)vormbaum.com>

To: commander-list(at)matronics.com

Sent: Saturday, August 29, 2009 2:47:20 PM

Subject: RE: 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(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of nico css

Sent: Saturday, August 29, 2009 12:31 PM

To: commander-list(at)matronics.com

Subject: RE: 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(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of Tom Fisher

Sent: Saturday, August 29, 2009 10:33 AM

To: commander-list(at)matronics.com

Subject: 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)

  

 	  Quote: 	
		  


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http://www.matronics.com/N======================== forums.matronics.com/" rel=nofollow target=_blank>http://forums.matroni--> [/quote]



  start: 0000-00-00 end: 0000-00-00        [quote][b]

cschuerm(at)cox.net
Guest

Posted: Sat Aug 29, 2009 5:32 pm Post subject: Simulated single-engine settings

Donnie Rose wrote:

 	  Quote: 	
		   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

BobsV35B(at)aol.com
Guest

Posted: Sat Aug 29, 2009 6:15 pm Post subject: 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!!  <G>

  

 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(at)cox.net writes:

  	  Quote: 	
		  -->    Commander-List message posted by: Chris <cschuerm(at)cox.net>



Donnie    Rose wrote:

 	  Quote: 	
		   I use 22" and 2300 rpm thereabouts


	


For simulated    zero thrust?!?  That's a LOT more than zero thrust on most 

direct    drive  ===============================================

_-=    Use the  ties  Day  ================================================               - MATRONICS WEB FORUMS  ================================================             - List Contribution Web Site  sp;                             ===================================================



	


 

  [quote][b]

tfisher(at)commandergroup
Guest

Posted: Sat Aug 29, 2009 7:09 pm Post subject: Simulated single-engine settings

Thanks Bob, that was a flurry of answers, I like your  method.

 Tom

 C-GISS

 680FLP (Mr.RPM)

 [quote]   ---

cschuerm(at)cox.net
Guest

Posted: Mon Aug 31, 2009 7:51 am Post subject: Simulated single-engine settings

BobsV35B(at)aol.com wrote:

 	  Quote: 	
		   Choose a MP that is about an inch below what it took to get to the 

 governing range.

I've used that technique as well Bob.   I've compared carefully measured 
	


performance with one actually feathered (which I do occasionally for 

practice) to your method and the numbers are certainly close enough to 

provide valid simulation.

For my two cents, I think some practice with one engine at idle (more 

drag then actually feathered) is valuable too.  Dragging one around in 

that configuration for a while makes the real thing feel a lot easier.  

I also do occasionally make landings (under safe conditions of course) 

with one actually feathered.  Landings ARE different with an actual 

feathered engine versus simulated zero thrust.

chris

BobsV35B(at)aol.com
Guest

Posted: Mon Aug 31, 2009 9:51 am Post subject: Simulated single-engine settings

Me Too Chris!

  

 That's why I said higher and lower powers are often handy for training  purposes.<G>

  

 As Always, It All Depends!

  

 Happy Skies,

  

 Old Bob

  

  In a message dated 8/31/2009 10:52:24 A.M. Central Daylight Time,  cschuerm(at)cox.net writes:

  	  Quote: 	
		  -->    Commander-List message posted by: Chris    <cschuerm(at)cox.net>



BobsV35B(at)aol.com wrote:

 	  Quote: 	
		   Choose a MP    that is about an inch below what it took to get to the 

 governing    range.

I've used that technique as well Bob.   I've compared    carefully measured 
	


performance with one actually feathered (which I do    occasionally for 

practice) to your method and the numbers are certainly    close enough to 

provide valid simulation.

For my two cents, I think    some practice with one engine at idle (more 

drag then actually feathered)    is valuable too.  Dragging one around in 

that configuration for a    while makes the real thing feel a lot easier.  

I also do occasionally    make landings (under safe conditions of course) 

with one actually    feathered.  Landings ARE different with an actual 

feathered engine    versus simulated zero  ================================================[b]

	


 

  [quote][b]

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