rotor& "wing" wrote in
message ...

Newps;645107 Wrote:


You can read up on this and when your pea brain realizes the engine
manufacturers are the last people to refer to for proper engine
operation we'll discuss the next Old Wives Tale. That you can reduce
plug fouling in a carb'd engine by leaning on the ground.

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http://tinyurl.com/6atqtu-

Wow......So now Mike Busch is smarter than the people that engineered
and designed the engine.

That wouldn't be hard.

While I enjoy some of Mr. Busch's writings, he's not a professional
mechanic....in fact he's never actually worked as a mechanic in his
life.

Argument from (false) authority.

Besides, Mr. Busch gets a lot of his information from the
manufacturer.

Cite?

From the article:

"Why would so many aircraft manufacturers publish such bad advice in their
POHs? Well for one thing, back in the 1960s and 1970s when many of the POHs
were written, the relationships between EGT, CHT and ICP were not as well
understood as they are today. The conventional wisdom at that time was that
richer mixtures were better for the engine, and leaner mixtures were worse.
A culture of fear evolved, promulgated by the flight instructors of the day:
If you leaned too aggressively, you'd blow up your engine.
With today's sophisticated instrumentation, we now know that this isn't
true. The hottest, most stressful mixture is about 50°F ROP, and mixtures
that are richer or leaner are better for the engine. At 75-percent cruise
power, you want to stay well away from that worst-case mixture setting,
either by operating at least 100°F ROP (preferably richer) or at least 20°F
LOP (preferably leaner), take your pick."

Just in case you didn't realize, the factory recommendation of 50 ROP, we've
come to realize, is the WORST possible setting to run. That's your
"brilliant" engineers.

To this day, IIUC, the engine manufacturers still HAVE NOT procured even
remotely the elaborate testing equipment that GAMI/TATurbo have developed.

http://www.engineteststand.com/