Lean Assist in FX-3

[hawgdrvr]

Lean Assist Demo - if I'm doing it wrong educate me and others. I'm new to this and initially was doing it wrong. Want to share things I've learned as it may help other new aircraft owners also new to panels like this.

https://youtu.be/ccOO5omJoXo

Note: I posted this on the Facebook CubCrafters group but the post was auto declined. Not sure why. (EDIT: fixed and posted)

[Andy]

Lean Assist Demo - if I'm doing it wrong educate me and others.

When I played the video the image was not only unstable but too small to see any detail. I'm not a fan of Youtube training videos. I'd far rather see a well presented document with good illustrations.

You seemed to take a long time to find peak and then the LOP point. I'm no expert on this but may be worth a read of this article -

https://resources.savvyaviation.com/...ox-red-fin.pdf

[hawgdrvr]

Video sucked as I'm still figuring out GoPro settings. I turned off Hypersmooth as it likes to pan on its own. I think that was the issue here. I've also been adjusting fps settings as the GNC refresh rate seems to match the GoPro refresh rate and goes black. 24 fps seems to work better. I think once I can get my settings figured out and get Premiere Pro figured out it would be better but I suck at videos. I do lean it out slowly. I'll review the PDF sent. I think I've tried to read that article before but it was confusing, reviewing next.

[jmorrical]

I do not want to misdirect this thread but it is interesting to me. I'm flying a CarbonCub EX(1) with a carbureted Titan CC340. I know the FX/EX-3 has the fuel injected CC363i. A statement in a Titan Operations Manual for the 340CC ASTM Certified Engine has cooled my interest in learning about Lean Assist. Can someone tell me why this statement has merit?

Note: There are some that advocate operating on the lean side of peak EGT. Although theoretically acceptable, It is generally not possible to operate lean-of-peak with an engine using a carburetor. (Found Chapter 3.5 - Cruise)

Here is a link to download that manual.

Titan_340CC_1.09.15.pdf


Savvy Aviation has a couple very good EAA Webinars on leaning. Here are links.

https://youtu.be/_VfiPuheeGw?si=WeqYDI_2ywKsbb-t

https://youtu.be/X-tKyiUZ3ts?si=O4VUesOvxF-eJEQI

[jmorrical]

Never give up... I found the rest of the quote and some good discussion on leaning carbureted engines.

While technically possible in some situations, it is generally not recommended to "lean over peak" (operate lean of peak) with a carbureted engine due to the uneven fuel distribution that can occur with carburetors, potentially causing rough running and engine damage; most experts advise leaning only slightly past peak on a carbureted engine and to use a fuel injected engine if you want to consistently operate lean of peak.

[Andy]

I fly a PA-28-180 with a Lycoming O-360 (mags and carb) and an FX-3 with a Lycoming YIO-360 (electronic iginition and fuel injection). There is almost no similarity between these aircraft when it comes to leaning technique.

The Titan with carb and electronic ignition probably falls somewhere in between but I have no experience with that engine. Generic advice is of far less value that advice from someone that really knows your specific engine. I have read about problems with burned valves in Titan engines so listen to people who have operated it without problems as well as those who have not been so fortunate.

One factor may be that electronic ignition allows leaner operation with carburetted engines than would be possible with mags. My O-360 is leaned to the slightest sign of roughness then richened slightly. It has run over 3,000 hours since overhaul.