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LOP Article - FLYING magazine

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robin(at)PaintTheWeb.com
Guest

Posted: Mon Apr 22, 2013 6:13 pm Post subject: LOP Article - FLYING magazine

There is an article on LOP operations in the April issue of FLYING. Yes I know the May issue is in hand but I am just getting around to it. The article has a simple graph and  discusses the physics of LOP ops. It also discusses some history of why LOP ops and why there may be some historical misunderstanding or the procedure. Peter Garrison is an advocate of LOP operations as I am but he even goes LOP right after takeoff and climbs  out at 65% power or less. Not sure I would get acceptable climb rates but I may give it a try at some point. 

Article Name: The Passion of Mixture 

  

Robin 

    [quote][b]

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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Mon Apr 22, 2013 6:22 pm Post subject: LOP Article - FLYING magazine

 	  Quote: 	
		  No reason to limit yourself to 65% power LOP for climb. Many of the 

Bonanza guys operate at 85% power LOP by doing the big mixture pull once 

safely into cruise climb. If you simply pull back to 14.8 gph while at 

full throttle, you will be LOP at 85%. 	




On Mon, Apr 22, 2013 at 7:12 PM, Robin Marks <robin(at)painttheweb.com (robin(at)painttheweb.com)> wrote:

  	  Quote: 	
		          

 Peter Garrison is an advocate of LOP operations as I am but he even goes LOP right after takeoff and climbs  out at 65% power or less. Not sure I would get acceptable climb rates but I may give it a try at some point. 

Article Name: The Passion of Mixture 

  

Robin 

     	  Quote: 	
		  



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Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

rv10flyer(at)live.com
Guest

Posted: Mon Apr 22, 2013 6:46 pm Post subject: LOP Article - FLYING magazine

Robin;

 I do just that, I take off full power, at 1000ft AGL reduce rpm to 2500rpm,  pull the throttle back to 65% and Lean out to 10.5 gph- which is what I know is  close enough for normal, based on testing this scenario, my CHTâ€™s stay low and I  climb out at 120-130kts as I climb, I continue to give it more throttle to keep  it at 65%, the plane like this more, shown with lower pressures and temps, than  full throttle and so do I when 20gph goes down by half but my speed  doesnâ€™t.

 I also will do this and go to full throttle (after EMT) to get above the  hills to the north of us. the forward speed keeps the temps lower than if I had  left the throttle in the whole time.

    

  From: Robin Marks (robin(at)PaintTheWeb.com) 

 Sent: Monday, April 22, 2013 7:12 PM

 To: rv10-list(at)matronics.com (rv10-list(at)matronics.com) ; rv-list(at)matronics.com (rv-list(at)matronics.com) 

 Subject: LOP Article - FLYING magazine

  



   

There is an article  on LOP operations in the April issue of FLYING. Yes I know the May issue is in  hand but I am just getting around to it. The article has a simple graph and  discusses the physics of LOP ops. It also discusses some history of why LOP ops  and why there may be some historical misunderstanding or the procedure. Peter  Garrison is an advocate of LOP operations as I am but he even goes LOP right  after takeoff and climbs out at 65% power or less. Not sure I would get  acceptable climb rates but I may give it a try at some  point. 

Article Name: The  Passion of Mixture 

  

Robin

[quote]



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[b]

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rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Mon Apr 22, 2013 7:08 pm Post subject: Re: LOP Article - FLYING magazine

I only climb LOP in cooler temps, light loads and over forgiving terrain. During the summer at gross, I want my "free A/C" asap, climb better than a 172(500-700 fpm) and remain in glide range of the airport on climb out.

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Wayne G.

Mauledriver(at)nc.rr.com
Guest

Posted: Mon Apr 22, 2013 7:26 pm Post subject: LOP Article - FLYING magazine

I generally do WOT climbs to cruise, only leaning to keep "the same" EGT 

temps to altitude.  "The same" being the EGTs I get at say 1,000' AGL 

with the mixture full rich (or at least at the mixture I decided to use 

at a high elevation field).



As I understand it, this is not a LOP climb but rather a climb that 

conservatively maintains the cooling effects of a full rich climb 

without overdoing it.  I then go to LOP cruise.



Bill "I couldn't afford to do this without some LOP ops" Watson

On 4/22/2013 11:08 PM, rv10flyer wrote:

 	  Quote: 	
		   



 I only climb LOP in cooler temps, light loads and over forgiving terrain. During the summer at gross, I want my "free A/C" asap, climb better than a 172(500-700 fpm) and remain in glide range of the airport on climb out.



 --------

 Wayne G.

 SB 12/01/2009-12/01/2011

 TT= 103





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