Fri, Feb 20, 2009
Re-engined Plane Uses Williams FJ44-2A Turbofans
A new Sierra Stallion SP owned by Dr. Jack Vondrak will be the
company's 50th aircraft, and 100th engine delivery, since the
original FJ44 Eagle II STC was awarded to Sierra Industries in
"With multiple clinics in several widely separated southwestern
cities, my practice demands fast, reliable long-range air travel,"
said Dr. Vondrak. "The amazing performance of the FJ44-powered
Citation makes it possible to visit clinics in 3 or 4 different
cities -- even in different states -- all in a single day!"
The Sierra Stallion modification adapts the Williams
International FJ44-2A engine to the Citation 500/501SP airframe,
dramatically enhancing overall performance and providing a
cost-effective alternative to a brand new aircraft. The 2,300 lb.
thrust engine provides numerous performance improvements, including
a 25% reduction in fuel consumption, a 50-knot increase in maximum
cruise speed, and a range increase of more than 250 nautical
Featuring modern digital engine controls and full-time synching,
the FJ44-powered aircraft is also easier to fly, while
substantially reduced noise and vibration reduce pilot fatigue and
airport noise pollution.
Sierra Industries and Williams International have worked
together for more than a decade, beginning with the development of
Sierra's Citation retrofit program in the late 1990's. Since the
introduction of the Eagle II and Stallion programs, Sierra has
established itself as an industry-leading provider of FJ44-powered
Citation aircraft modifications.
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