When Norway’s fleet of
Lockheed Martin F-35As comes online in 2015,
there will be little to distinguish them from jets belonging to the United
States and other programme partners.
That will change after 2017, when the Scandinavian nation will be the
first to receive a modular kit to equip its jets with drag chutes that
help the aircraft land on icy Arctic runways. The chute, which the
Netherlands and Canada also are eyeing as a modification to
their
F-35s, is the first aftermarket modification to the jets through
seven low-rate initial production (LRIP) lots.
Norway will take delivery of its first F-35A in 2015, but testing on
the chute will not begin for another two years. Until then, the
Norwegians will train in the United States with “clean,” unmodified
aircraft, Suku Kurien, Lockheed’s F-35 drag chute programme
manager, tells Flightglobal.
Norway’s first jets – included in LRIPs 7 and 8 ‑ will be equipped
with Lockheed’s Block 2B software configuration, which does not
include the capability to deploy an arresting chute. Norwegian
pilots still will train with the aircraft at Luke Air Force Base in Arizona.
The necessary hardware modifications, including airframe
reinforcements, are being performed on planes in the current LRIP 7
and 8, which Lockheed and the US government are negotiating. The
Block 3F software that will allow for chute deployment, will be the
standard configuration for all aircraft in LRIP lots 9 and beyond,
Kurien says.
Chute testing will begin in 2017 when the aircraft designated AF-2 –
currently performing load testing for the US air force’s conventional
takeoff and landing F-35 variant – will be outfitted in 2017 with a pod
containing the arresting chute. It will then undertake wet-dry
performance and flight manoeuvring testing through November 2017,
Kurien says.
Within a month of the completion of flight testing at Edwards Air
Force Base in California, the aircraft will begin two to three months of
testing in an arctic environment, likely at Eielson Air Force Base in
Alaska. There the jet will land with and without the chute and t
est ground taxiing to gauge its manoeuvrability over wet, icy
runways like those the Norwegian air force routinely operates from in
winter months.
The chute’s design borrows heavily from those already used by Norway
and other nations on the F-16 and
Eurofighter Typhoon, Kurien says.
Those aircraft use nylon chutes that will have to be made out of Kevlar
to suit the F-35, on which the drag chute is deployed from above
and behind the engine exhaust outlet.
Installed in the centre of the rear fuselage, the pod containing the
chute can act like a miniature rudder based on wind-tunnel
testing,
Kurien says. The Norwegian jets, therefore, will undergo extensive flight
testing with the pod installed. Data collected from the tests will be used
to train pilot from other nations that buy F-35s with drag chutes, he says.
“In harsh manoeuvres with high angles of attack, it seems to be pretty
invisible,” he says.
Norway intends to keep its pods installed permanently, but other
nations like the Netherlands and Canada, can remove them in warmer
months.
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