Leaning during take-off/climb phase?

[NicoN]

I just saw an article about leaning techniques especially on Cirrus SR22 with the EMAX system.

I am just thinking if this or some of the procedures is advisable also for my M20K, equipped with an EDM830 engine monitor

1. lean your engine during taxi as much as possible

- I think, this is a good procedure and cannot damage my engine, right?

 

2. during take-off (and climb?) gardually lean your engine keeping the EGTs on the level of take off.

Hmm!?

 

3. This artcile suggests finding the correct setting for LOP coming from the lean side, not from the rich side

- Make a "big pull" and lean until the aircraft starts decelerating

- ENRICH until the FIRST clyinder  peaks (i.e. reaches the maximum EGT)

- Then lean a bitr more

Hmm, I hope I understand the procedure correct. The author says, that the engine is in the red box for a shorter time.

But, can my EDM830 do this? I think not

What is your opinion?

[KSMooniac]

You are correct, except don't lean in the climb with a turbo. I use the target EGT method to lean on takeoff/climb in my J, but turbos should just leave everything full forward.

Sent from my LM-V405 using Tapatalk

[ArtVandelay]

I lean to 150°F ROP on climb, on takeoff with full mixture it’s closer to 250°, but start leaning once above pattern altitude.

[carusoam]

Nico,

I think the thing that stands out…

You didn’t mention turbo and TIT…

Leaning during the climb is normal for NA engines…

Leaning continuously adds to the work load, even with a nicely calibrated TIT or EGT instrument…. (Blue/white box methodology)

Since a turbo engine is running high power all the way to the FLs…

… and leaning usually occurs after power levels are changed….

 

If you don’t change the power in the climb… leaning during the climb won’t make any sense…

Keeping an eye on the TIT is the usual method of leaning a turbo engine…

 

Now… if you said an SR22T was leaning in the climb….  Note the T at the end….  

Those silly Cirrus guys…. 
 

PP thoughts only, not a Cirrus driver…. Not familiar with Emax at all….

Best regards,

-a-

[A64Pilot]

IF you lean for taxi, be sure to aggressively lean, lean it so much that it won’t take much throttle, you do this to ensure you can’t make a mistake and takeoff leaned out, people have and have died doing so.

You have the LOP leaning procedure correct, your looking to lean from the richest cylinder and easiest way to get that is to sneak up on it  from the lean side.

Just remember this, if your LOP, then being a little extra lean is safe, and if your ROP, being a little rich is safe, don’t get locked into trying to be exactly 25 LOP for example, be at least 25 LOP, a little extra is just additional safety.

Your current monitor will I’m sure suffice, maybe not automatically but it gives plenty of info.

‘Oh and on edit, as Carusoam said TIT is very important, it’s the turbos temp limit of course. the engine has no max EGT, but the turbo does.

Edited January 26, 2022 by A64Pilot

[Fly Boomer]

On 1/26/2022 at 8:47 AM, A64Pilot said:

lean from the richest cylinder and easiest way to get that is to sneak up on it  from the lean side.

Boys in Ada advocate for the BMP (Big Mixture Pull) to get waaaaay into lean territory.  Then richen from there.  Minimizes time in the red box/fin.