REFLECTOR: Fuel Consumption Performance

[Scott Derrick]

But Bernard, to have all the cylinders Lean of 50 LOP, you have to lean
to the "Last to Peak", not the first.  The first is the leanest
cylinder, all the rest are richer.

You use the "First to Peak" for ROP operations.

Scott


Bernard Despins wrote:
> 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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