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systems, ground proximity warning system and a traffic alert and collision avoidance
system (TCAS).
CARGO
The fuselage cross-section of the 747-400 freighter is optimized to carry the
maximum cargo with a minimum total container weight. The freighter is fitted with
large cargo door and a nose cargo door which allow efficient use of the aircraft's large
internal volume and a shortened loading and unloading time. The aircraft carries up
to 30 pallets on the main deck and 32 standard LD-1 containers and additional bulk
cargo in the lower cargo hold.
The 747-400F has the same upper deck as the 747-200F and includes a revised
upper deck floor for two additional 3.1m-high pallets on the main cargo deck.
The upper deck access ladder was relocated, and the guide rails and the tie
down systems revised to accommodate the additional pallet position in the nose of the
747-400F. The changes result in an additional 21.9m³ of cargo deck space on the
main deck compared to the 747-200F.
An additional 19.8m³ of container cargo volume is available in the lower hold:
two additional standard LD-1 or LD-3 containers can be positioned in the aft lower
hold and two additional containers can be fitted in the forward lower hold.
The holds are equipped with an improved powered cargo handling system.
747-400 SPECIAL FREIGHTER
In January 2004, Boeing launched the Special Freighter Conversion Program.
33 firm orders and 29 options have been received for the freighter. Cathay Pacific is
the launch customer for the 747-400 Special Freighter with an initial agreement to
convert six, with options on a further six, 747-400 passenger airplanes into freighters.
Deliveries are planned to begin in December 2005. In May 2004, it was confirmed
that Nippon Cargo Airlines would be the second customer with an order for four Spe-
cial Freighters. In June 2004, Korean Air ordered up to 20 conversion kits. Except for
the first aircraft, the conversions will be carried out by Korean Air's Aerospace divi-
sion. In May 2005, Air France ordered the conversion of three of its Combi aircraft to
the Special Freighter configuration. Other customers include three aircraft for Japan
Airlines (JAL) and four for Guggenheim Aviation Partners.
To convert the 747-400 passenger jet to a freighter configuration, a side cargo
door, supplied by Mitsubishi Heavy Industries (MHI), is fitted. The layout is identical
to the production freighter. The main deck has capacity for 30 pallets and the upper
deck can seat up to 19 people. The main deck floor is specially strengthened and
lined. There is a new cargo handling system and revised avionics.
The Special Freighter will have an estimated capacity of 113,490kg
(250,200lb) and a range of 7,600km (4,100nm).
ENGINES
The aircraft is of wide fuselage, low wing design with four podded underwing
turbofan engines. Optional engine fits include Pratt & Whitney PW4062, General
Electric CF6-80C2B5F and Rolls-Royce RB211-524H2-T turbo-fan engines, devel-
oping between 252kN and 276kN. There are four main fuel tanks in the wings, a cen-
ter wing tank, a tailplane tank and reserve fuel tanks in the outer wing sections. The
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