REFLECTOR: Fuel Consumption Performance

[Bernard Despins]

I think Terry may be arriving at the same "sweet spot of leaning" as you 
are Scott.  He is just making all of his cylinders leaner than the sweet 
spot, and adding fuel until the FIRST cylinder reaches it.   The rest of 
the cylinders are cooler than the sweet spot.   The only problem with 
this is that when all the cylinders go leaner than the "sweet spot"  
(lets say 50 LOP) you may go a little too far on the lean side and the 
engine could run a little rough depending on how well balance the 
injectors are.   No harm done.

Scott just skips the step of making all the cylinders leaner than the 
sweet spot and leans starting on the ROP side of things until the LAST 
cylinder gets to 50 LOP.  The rest of the cylinders are cooler than the 
sweet spot.  Just like Terry's method.  The only problem would be 
leaning too slow and lingering in the "danger zone".  But once you get 
use to the "big pull", it is absolutely not a problem.

Hope this helps.

Bernard Despins



Terry Miles wrote:
>
> Al,
>
> Here is my cruz engine log to include this last IN to CO trip.  
> Westbound was full power.  10,000 will get me mid 180 Kts TAS and 
> 12,000 gets mid 190 kts TAS.  That runs about 11.5 at full throttle 
> and leaning 50 LOP.  Thanks to Scott I did it right and pulled the 
> mixture out until they were all LOP and enriched back on the first to 
> peak so to get 50 LOP. 
>

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