AOPA Pilot Magazine - July 2022 - 87

RUDDER & WRENCH
FUTURE TECH /
Our turbine future
Can light GA ever have a viable
turbine option?
BY IAN J. TWOMBLY
®
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AND
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EXCEL LENT REL I ABI L I T Y, DECENT efficiency,
and easy to operate, all at a
reasonable cost. The wish list for a small
turbine engine that can make it in the
light GA world doesn't seem particularly
demanding. The specs don't have to measure
up to a piston in some cases. But look
at the lack of turbine power on anything
smaller than a Cirrus Vision Jet and it's
clear we have a long way to go.
Jet owners get to enjoy higher cruise
speeds, greater time between overhauls,
better reliability, and, in the case
of modern engines, significantly easier
operations. Owners of Beechcraft
Bonanzas, Cessna 210s, and others want
in. So, what's the problem? Previous small
turbine projects have come either from a
manufacturer that tries to scale down its
proven technology or one that moves from
military to civilian. Remember when an
Eclipse was $850,000, and then was suddenly
$1.2 million (which would balloon
further)? That was a scaling problem.
David Noland wrote a wonderful
break-down of this in Air & Space magazine
soon after it happened. Eclipse had
contracted with Williams International
to produce what would be dubbed the
EJ22, an 85-pound engine that could produce
770 pounds of thrust. Unfortunately,
it never worked. Already wildly successful
with its military cruise missile
business and FJ44 turbine on business
jets, Williams attempted to scale down
its three-stage design. Although it is
likely the various issues could have been
worked out in development, the engine
was quickly scrapped for the Pratt &
Whitney PW610F.
AOPA PILOT / July 2022
87
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MIKE FIZER

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AOPA Pilot Magazine - July 2022

Table of Contents for the Digital Edition of AOPA Pilot Magazine - July 2022

Contents
AOPA Pilot Magazine - July 2022 - Intro
AOPA Pilot Magazine - July 2022 - Cover1
AOPA Pilot Magazine - July 2022 - Cover2
AOPA Pilot Magazine - July 2022 - Contents
AOPA Pilot Magazine - July 2022 - 2
AOPA Pilot Magazine - July 2022 - 3
AOPA Pilot Magazine - July 2022 - 4
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AOPA Pilot Magazine - July 2022 - 6
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AOPA Pilot Magazine - July 2022 - Cover3
AOPA Pilot Magazine - July 2022 - Cover4
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