You guys are in trouble:

From: al p wick <alwick@juno.com>
Date: 2005/06/01 Wed PM 05:53:06 EDT
To: Cozy_Builders@mailman.qth.net
Subject: COZY: Rotary risks

I'm part way thru measuring Rotary risks. Using Tracy's newsletters as
basis(what a neat guy). One thing is abundantly clear, it is a very high
risk install. Substantially higher than the Lycoming. I know this is
going to upset a lot of people. I don't want to remain silent when I have
facts that may save a life.
Each change you make to a system increases your risk. Tons of changes.
Marginal cooling of oil and water 6+ years later. Having to watch
something is a root cause of pilot oversight.
High shut down risk of his EFI system(too bad, as his EFI could be a huge
risk reduction if designed differently).
Repeat root cause failures to design changes... the same pattern to all
the failures.

Doesn't mean don't use rotary, Perry had much lower risk as he didn't
modify all those systems. It means, if you go that route, you better make
sure you use every skill you can muster to anticipate failures and
qualify each change while on the ground.

I'll itemize the risk items in future, too many pans in fire right now. I
also have to look at other info sources.

Risk is not measured by how many moving components you have. That is
propaganda. As are terms like "hand grenade" and "melting aluminum". It's
the total system that counts.

Fire away!

-al wick
Artificial intelligence in cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on engine/airframe from Portland, Oregon
Prop construct, Subaru install, Risk assessment, Glass panel design info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html

On Wed, 1 Jun 2005 09:13:16 -0700 "Keith N91KS" <kspreuer@yahoo.com>
writes:
 The rotary guys are coming in much lighter and

the reliability of those engines sounds like they have made great
improvements.

Keith
Cozy N91KS

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