Page 16 - Aerotech News and Review 5-20-16

Icing tests open doors to ease flight restrictions
by Christopher Ball
Edwards AFB, Calif.

Whenever the Global Hawk begins Air Force photograph by Chris Higgins
a mission, it has to travel through a
certain area of the atmosphere that, Global Vigilance Combined Test Force members at Edwards Air Force Base, Calif., prepare a Global Hawk remotely piloted vehicle to perform icing test flights.
under certain conditions, can create The aircraft was fitted with a 3-D printed nylon structure to duplicate the weight and drag of ice forming on wings and tail.
ice on the aircraft, adding weight and
aerodynamic drag.

A cloud deck from about 8,000 feet
to 22,000 feet is the main concern for
the Global Hawk, according to project
engineer Jonny Kim, Global Vigilance
Combined Test Force at Edwards Air
Force Base, Calif.

According to Maj. Ryan Finlayson,
test pilot with the Global Vigilance
CTF, the ice only forms for about five
minutes on the way up, and again on
the way down through this cloud deck.

To assure that these variables will
not negatively impact the Global
Hawk’s role, members of the Global
Vigilance Combined Test Force here
are testing the aircraft in a unique way.

Rather than wait for the right
weather conditions, the formation of
the cloud deck, technology was used
to design 3-D printed nylon attach-
ments to mimic the ice that would
form on the aircraft during ascent and
descent.

“This was a first-of-type testing
done here at Edwards. No other pro-
gram or CTF has accomplished icing
testing in this manner,” said Lt. Col.

See GLOBAL HAWK, Page 17

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16 Aerotech News and Review May 20, 2016

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