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Engine Monitor Range/Alarm settings

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n223rv(at)wolflakeairport
Guest

Posted: Sun Jan 09, 2011 10:25 am Post subject: Engine Monitor Range/Alarm settings

Does anyone have a list of engine monitor settings, like green-yellow-red settings for the engine parameters?  I have an IO-540 in a RV-10.  Just looking fir something to start with.  Thanks

-Mike Kraus



Sent from my iPhone

rv10builder(at)verizon.ne
Guest

Posted: Sun Jan 09, 2011 12:24 pm Post subject: Engine Monitor Range/Alarm settings

oops sorry! wrong numbers!

Look at the engine manual  or lycoming's site.. I saw it somewhere just donâ€™t 

recall where.



--

rv10builder(at)verizon.ne
Guest

Posted: Sun Jan 09, 2011 12:24 pm Post subject: Engine Monitor Range/Alarm settings

Vans has this on their site:

http://www.vansaircraft.com/pdf/speeds.pdf



--

Kelly McMullen

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

Posted: Sun Jan 09, 2011 1:01 pm Post subject: Engine Monitor Range/Alarm settings

Here are some conservative numbers:

CHT, 380 F yellow, 400 red, 200-380 green

Oil pressure, 25-50 yellow, 55-75 green,75-90 yellow, above that red

Oil temp 160-220 green 220-240 yellow 240 red.

Fuel pressure 20-28 green, below 18 and above 28 red,

 Fuel flow, above 27 or so red.

That should get you started. Keep in mind that Lycoming operator's handbook red lines are NOT conservative...like CHT redline 475-500 in climb and 425 in cruise...much too hot.



 

On Sun, Jan 9, 2011 at 11:18 AM, Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)> wrote:

 	  Quote: 	
		   --> RV10-List message posted by: Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)>

 

 Does anyone have a list of engine monitor settings, like green-yellow-red settings for the engine parameters?  I have an IO-540 in a RV-10.  Just looking fir something to start with.  Thanks

 -Mike Kraus

 

 Sent from my iPhone

 

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

mregoan(at)hispeed.ch
Guest

Posted: Sun Jan 09, 2011 10:36 pm Post subject: Engine Monitor Range/Alarm settings

I just read Sonja Englert’s book last night claiming that for a good engine break-in, the CHT needs to be above 400°F.  No specifics or justification is given, but combined with Kelly’s numbers below that would put you in the red for your first few hours of flight which would not seem such a good idea.    

   

Just a head’s up.  

   

Gordon Anderson  

#41015 tailcone priming  

     

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Kelly McMullen

 Sent: 09 January 2011 21:58

 To: rv10-list(at)matronics.com

 Subject: Re: Engine Monitor Range/Alarm settings  

  

   

Here are some conservative numbers:

 CHT, 380 F yellow, 400 red, 200-380 green

 Oil pressure, 25-50 yellow, 55-75 green,75-90 yellow, above that red

 Oil temp 160-220 green 220-240 yellow 240 red.

 Fuel pressure 20-28 green, below 18 and above 28 red,

 Fuel flow, above 27 or so red.

 That should get you started. Keep in mind that Lycoming operator's handbook red lines are NOT conservative...like CHT redline 475-500 in climb and 425 in cruise...much too hot.

 

     

On Sun, Jan 9, 2011 at 11:18 AM, Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)> wrote:  

--> RV10-List message posted by: Michael Kraus <n223rv(at)wolflakeairport.net (n223rv(at)wolflakeairport.net)>

 

 Does anyone have a list of engine monitor settings, like green-yellow-red settings for the engine parameters?  I have an IO-540 in a RV-10.  Just looking fir something to start with.  Thanks

 -Mike Kraus

 

 Sent from my iPhone

 

 ===========

 arget="_blank">http://www.matronics.com/Navigator?RV10-List

 ===========

 http://forums.matronics.com

 ===========

 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

 ===========

 

 

   

  

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dlm34077(at)q.com
Guest

Posted: Mon Jan 10, 2011 3:25 am Post subject: Engine Monitor Range/Alarm settings

My experience with a new certified engine from  Vans. Purchased in 4th quarter 2004 to buy before the $6k increase. ; first run  1st quarter 2008. Using GRT EIS, the initial 25 hour testing found that the CHTs  on takeoff occasionally would exceed 420 but would soon recede to 380-400 after  increased speed to 120 KIAS. First 5 hours I would see CHTs in low 400s on take  off and with minor leaning the temps would go to low 400s. Much flying was cross  country as my DAR gave me a run of about 90 miles as longest leg. Around 10  hours oil composition reduced  and temps also. Now at 379 hours, CHTs all  below 360 which is top of the green for my monitor setting. Typical LOP is  55-65%, fuel flow in the 9-12 range , CHTs high 200s/low 300s. EGTs highest  below 1420 where top of green is set for EGTs. Oil consumption is a quart for  about every 15 hours. I change oil every 35 hours, filter every other oil change  and consume about one quart between changes. I generally run LOP, low power  settings. This aircraft will climb at 65% at 800-1000 fpm so when asked "how  fast does it go?" My answer is "I don't know I have not been there yet.." When  the fuel flow indicates 24 gph at full throttle takeoff, one starts to reduce  power soon after takeoff. Be advised we reduced and then removed the air dams on  cylinders 1 and 2; but also keep in mind that I live and fly in Phoenix. If I  lived in IL, near my original home, my experience would be  different.

 [quote]   ---

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Mon Jan 10, 2011 7:02 am Post subject: Engine Monitor Range/Alarm settings

It is a question of whether you want to set alarms for what you want in 

the long run or if you are worried about having a few brief alarms on 

first few flights while the engine is breaking in.

Myself, if the engine starts to go above 400, I want to be watching it 

like a hawk and taking action to limit the temperature increase, like 

nosing over for more airspeed, richening mixture, if not full rich, and 

possibly reducing power setting. 425 would be my absolute do not exceed 

red line, but that is why I want yellow and red line alarms below that 

value, so I can take action to prevent exceeding my real limit.

John Deakin's Pelican's Perch articles on Avweb give some good 

background on temps and metallurgy to consider CHT limits lower than 

Lycoming's official numbers.



As for a good break-in, temperature is a secondary consequence of what 

is needed for good ring seating. That is high pressure against the rings 

from high power settings. Temperatures limit how high a power you can 

use. Some advocate achieving a higher power setting by going very lean 

of peak, say 80 degrees, and using 80-85% power. The extreme leaness 

limits the CHT and gives a broader pressure peak during combustion, 

where rich of peak the engine runs hotter and each combustion peak is 

very sharp and brief.

How you do your break-in is going to be based more on warranty 

considerations and instructions from your engine builder than anything 

else. If you choose to do other than those instructions, you are on your 

own if something bad happens.

On 1/9/2011 11:22 PM, Gordon Anderson wrote:

 	  Quote: 	
		  

 I just read Sonja Englert’s book last night claiming that for a good 

 engine break-in, the CHT needs to be above 400°F. No specifics or 

 justification is given, but combined with Kelly’s numbers below that 

 would put you in the red for your first few hours of flight which 

 would not seem such a good idea.



 Just a head’s up.



 Gordon Anderson



 #41015 tailcone priming



 *From:*owner-rv10-list-server(at)matronics.com 

 [mailto:owner-rv10-list-server(at)matronics.com] *On Behalf Of *Kelly 

 McMullen

 *Sent:* 09 January 2011 21:58

 *To:* rv10-list(at)matronics.com

 *Subject:* Re: Engine Monitor Range/Alarm settings



 Here are some conservative numbers:

 CHT, 380 F yellow, 400 red, 200-380 green

 Oil pressure, 25-50 yellow, 55-75 green,75-90 yellow, above that red

 Oil temp 160-220 green 220-240 yellow 240 red.

 Fuel pressure 20-28 green, below 18 and above 28 red,

 Fuel flow, above 27 or so red.

 That should get you started. Keep in mind that Lycoming operator's 

 handbook red lines are NOT conservative...like CHT redline 475-500 in 

 climb and 425 in cruise...much too hot.



 On Sun, Jan 9, 2011 at 11:18 AM, Michael Kraus 

 <n223rv(at)wolflakeairport.net <mailto:n223rv(at)wolflakeairport.net>> wrote:



 

 <n223rv(at)wolflakeairport.net <mailto:n223rv(at)wolflakeairport.net>>



 Does anyone have a list of engine monitor settings, like 

 green-yellow-red settings for the engine parameters? I have an IO-540 

 in a RV-10. Just looking fir something to start with. Thanks

 -Mike Kraus



 Sent from my iPhone



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 arget="_blank">http://www.matronics.com/Navigator?RV10-List

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 http://forums.matronics.com

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 le, List Admin.

 ="_blank">http://www.matronics.com/contribution

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 *  *

 *  *

 **

 **

 **

 **

 **

 **

 *http://www.matronics.com/Navigator?RV10-List*

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 **

 **

 *http://forums.matronics.com*

 **

 **

 **

 **

 *http://www.matronics.com/contribution*

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 *

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

dlm34077(at)q.com
Guest

Posted: Mon Jan 10, 2011 7:26 am Post subject: Engine Monitor Range/Alarm settings

My CHTts are set as 200-360 green, 361-420 yellow  421-red



EGTs are set as 1000-1420 green, 1420- yellow

---

rv10builder(at)verizon.ne
Guest

Posted: Mon Jan 10, 2011 8:04 am Post subject: Engine Monitor Range/Alarm settings

I mentioned looking at the Lycoming specs for the engine, I found the 

"Lycoming key operations" in there it states:

For maximum service life, maintain the following recommended limits for 

continuous operation.

Minimum in-flight CHT should be 150Ëš F (65Ëš C), and maximum in most 

direct-drive normally aspirated Lycoming engines is 500Ëš F (260Ëš C). Some of 

our higher-powered more complex

engines have a maximum limit of 475Ëš F (245Ëš C). Although these are minimum 

and maximum limits, the pilot should operate his or her engine at more 

reasonable temperatures in order to achieve the expected overhaul life of 

the power plant. In our many years of building engines, the engines have 

benefited during continuous operation by keeping CHT below 400Ëš F in order 

to achieve best life and wear of the power plant. In general, it would be 

normal during all-year operations, in climb and cruise to see head 

temperatures in the range of 350Ëš F to 435Ëš F.



I tend to believe this is a Lycoming "general", when the time comes I'll 

call my engine builder and get their thoughts on the temps as well.



--

Jim Berry

Joined: 10 Jan 2006
Posts: 237
Location: Denver

Posted: Mon Jan 10, 2011 3:08 pm Post subject: Re: Engine Monitor Range/Alarm settings

FWIW Mike Busch's webinar on cylinders states that cht's above 400* reduces the tensile strength of that head by 50%. I am not clear if he means reduced strength while the temp is elevated, or permanently. If the latter, that is scary.



Jim Berry

N15JB

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