Market Overview

Parker Aerospace Wins Cessna Denali Contract; Technology Innovations Yield Greater Bleed Air Control System Efficiency and Reliability


System design integrates new technologies for innovative turboprop

, a business segment of Parker Hannifin Corporation
(NYSE: PH), the global leader in motion and control technologies, today
announced that its Fluid
Systems Division
was awarded the bleed air control system (BACS), a
major component of the environmental control system, for Textron
Aviation's Cessna Denali turboprop aircraft. The Denali BACS controls
the flow and temperature of bleed air from the aircraft's engine that
serves to pressurize the cabin. The system includes four valves and an
electronic controller.

Having successfully completed the development-testing phase, Parker
Aerospace's BACS modulates high-pressure bleed air from the engine,
which is used to draw cool ambient air from outside the aircraft as it
takes off. Once the outside air pressure is too low to draw in and the
bleed air temperatures are cooler, the BACS will transition to use only
low-pressure bleed air to pressurize the cabin. At very high altitudes,
the BACS will also supplement the low-pressure air with additional
high-pressure air as required to meet flow requirements.

The system's ability to measure and respond to constantly changing
variables is what sets it apart. To enable Parker's controller software
to make decisions about which air sources to draw upon in a given flight
scenario, special sensors were engineered that measure the mass air flow
rate and the temperature of the air.

Another challenge was using electronically actuated valves in a hot
environment. To keep heat away from the electronics, the valves use
standoffs made of a unique ceramic material to hold the actuators. This
ceramic has a thermal conductivity one-third that of titanium, a thermal
expansion rate similar to stainless steel, and a tensile strength
similar to aluminum and so proved to be an ideal candidate for the
standoffs at a lower cost than titanium or mica alternatives.

In addition to its in-house design and manufacturing activities, Parker
is working closely with its suppliers to optimize other system
components, such as the efficient and reliable high-temperature stepper
motor used to drive the flow control valves.

"The Cessna Denali is expanding the envelope in turboprop aircraft
design and performance, and Parker's bleed air control system reflects
that commitment to innovation," said Joe Stilla, pneumatics project
engineer, for the Parker Aerospace Fluid
Systems Division
. "We invested significantly in the up-front design
of the system and were able to demonstrate the effectiveness of our
solution to Cessna. The Denali program will be a significant piece of
business for us, and we believe the win can lead to additional
opportunities for Parker."

The Parker Aerospace stand is in Hall 4, #4660, at the Farnborough
International Air Show, July 16-22, 2018.

About Parker Aerospace. Parker Aerospace is a global leader in
the research, design, integration, manufacture, certification, and
lifetime service of flight control, hydraulic, fuel and inerting, fluid
conveyance, thermal management, lubrication, and pneumatic systems and
components for aerospace and other high-technology markets. The company
supports the world's aircraft and aeroengine manufacturers, providing a
century of experience and innovation for commercial and military

About Parker Hannifin. Parker Hannifin is a Fortune 250 global
leader in motion and control technologies. For 100 years the company has
engineered the success of its customers in a wide range of diversified
industrial and aerospace markets. Learn more at
or @parkerhannifin.

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