LOP vs ROP
Re: LOP vs ROP
How much in which way?
-Esa
-Esa
Re: LOP vs ROP
Well, basically you get a bit more power when ROP by that amount, however, quite a bit cooler (and maybe cleaner) engine and better efficiency if LOP.
-Esa
-Esa
Re: LOP vs ROP
A picture can be worth a thousand words!
TJ
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- Piper_EEWL
- Chief Master Sergeant
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- Joined: 26 Nov 2014, 14:14
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Re: LOP vs ROP
Yes that's a very nice diagram. Explains a lot.
Thanks for sharing!
Thanks for sharing!
B377&COTS, J3 Cub, B-17G, Spitfire, P-40, P-51D, C172, C182, Pa28, Pa24, T-6 Texan, L-049&COTS, Bonanza V35B
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- Senior Airman
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Re: LOP vs ROP
I was flying yesterday morning, and I was LOP, but I felt the RPM was moving a bit. A little unstable. Too lean, I presume, but when I slightly enriched the temps shot up a lot. I'm not comfortable yet with this LOP operation. I don't do it in real life, in my older 172, so it's all new to me.
Re: LOP vs ROP
What I do is I lean till the engine starts to run rough and then I richen one to two turns in and it smooths out but year I saw my EGT's at one point 1460
Re: LOP vs ROP
I just use the simplest possible economy lean: lean as far as you can get while keeping it smooth. It is very simple in the sim where the engine roughness is somewhat 'scripted' in Accusim too; as far as I've studied, in typical real world fuel distribution systems the less-than-smooth running gets progressively worse from being noticeable non-issue to real roughness; it depends subjectively on what is acceptable, not being a percent too lean of some borderline of roughness.
-Esa
-Esa
Re: LOP vs ROP
if it's silky smooth, you most likely enrichened right back to peak EGT. Lean it back out. In the 172 I shoot for two bars (roughly 50 degrees LOP). Stop cheating by using the tool tips. The real 172 doesn't read numbers, only degrees of change.awash2002 wrote:What I do is I lean till the engine starts to run rough and then I richen one to two turns in and it smooths out but year I saw my EGT's at one point 1460
See the graph I posted above as to why your EGTs are so high. You aren't past LOP yet.
TJ
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