Mailing List lml@lancaironline.net Message #14895
From: Rob Logan <rob@ct.picker.com>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: PRISM vs FADEC [again] was: leaning during climb
Date: Tue, 20 Aug 2002 14:46:10 -0400
To: <lml>
> 65% on economy (for some dumb reason) it switches to ROP.  I still
> don't agree with the system design,

who wants to spend $200k on a legacy and run it at best economy? (LOP
in go slow mode?) best power is the ONLY place to be! look how fast
the power drops off LOP:

http://www.avweb.com/articles/pelperch/graphics/pp18b.jpg
http://www.avweb.com/articles/pelperch/graphics/pp35_best_range.jpg

the only reason to run best economy is to reduce your fuel bill, fly
farther, or if you can't run best power because of excess heat.  now if
one has some kinda blower, you can get SOME of that power back, but I'm
normally aspirated and would love a computer that finds best power.  the
problem is FADEC wasn't ready when I was, so I'll hafta find it by hand.

also PRISM does not do mixture, so it offers protection (retards
timming) as you find best power or economy but will not find it for you.

Rob (with asbestos on)
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