wrote in message
...
On Wed, 5 Oct 2005 19:28:50 -0700, "Matt Barrow"
wrote:

Who is the "GAMI guy"? Not Deakin?

http://www.avweb.com/news/columns/182132-1.html

You'll have to forgive my language, but somehow if I tell an owner
something out on the shop floor, or in the 'groups based on my
personal experiences (and experiences of other "unknown" professionals
in the industry) it's hearsay and/or an OWT, but if it gets published
on Avweb, it's freakin' stone tablets handed down from the heavens.

And many people accept OWT with NO substantiation. Take it on "faith", ya
know. How much proof do youoffer when you tell someone something on the shop
floor? How many people have never heard one word of substantiation for doing
theings the way they did other than from the logical fallacy of Argument
From Authority?


Do me a real big favor and don't ask my professional opinion of "teh
$avvey aviaytor".

I won't ask you opinion on spelling and grammar, either! ! :~)

I am not disputing the advantages to PROPER LOP cruise operation-on
engines proven to operate LOP-for example, the TCM-powered Malibu was
specifically designed to operate LOP. BUT-if you do not know EXACTLY
what you are doing running a turbo-supercharged GA engine LOP you can
DESTROY your engine. If you don't want to take my word for it, re-read
the article at the link you provided.

You can destroy your engine running ROP, too. You can ruin it using numerous
techniques IF YOU DON'T KNOW WHAT YOU'RE DOING.


TC

BTW the "GAMI guy" is:

George Braly-Chief Engineer


From the article you referenced:

George Braly writes:

"The truth of the matter is, if one does a very, very careful
analysis of all of the Service Difficulty Reports, all of the NTSB
accident reports, and sorts through the data, one comes to the
conclusion that almost all of the detonation that is experienced by
pilots is a result of the following:

1. Fuel quality issues;

2. Magneto and harness cross-firing, or improper magneto
timing;

"There are some reports of detonation that were probably
mis-classified as pre-ignition events due to damaged spark plugs or
heli-coil problems in the cylinder.

"And, last, yes, there are some, a few, cases of detonation that
are "for real" and were caused by very misinformed engine operating
techniques by the pilot. If you get in a pressurized Cessna P-210 and
decide to lean the engine in the mountains for your short field
takeoff, because that is the way you used to do it when you had your
normally aspirated C-210, then you can destroy the engine with pure
detonation by the time you turn cross wind in the traffic pattern. It
will absolutely ruin your day.

"However, in general, detonation is a very rare event and is
usually caused by fuel or ignition problems."

Yes...so?

Matt B.

(Five years and 1400 hours LOP in a TNIO-550 without a burp).