The Boeing E-6 Mercury is an airborne command post
and communications relay based on the Boeing 707-320. The original E-6A
manufactured by Boeing's defense division entered service with the United
States Navy in July 1989, replacing the EC-130Q. It conveyed instructions from
the National Command Authority to fleet ballistic missile submarines, a mission
known as TACAMO (Take Charge and Move Out). The E-6B model deployed in October
1998 kept this role, but added further command post capabilities and control of
land-based missiles and nuclear-armed bombers. The E-6B replaced Air Force
EC-135Cs in the "Looking Glass" role, providing command and control
of U.S. nuclear forces should ground-based control become inoperable.
Design
and Development
Like the E-3 Sentry airborne warning and control
system (AWACS) aircraft, the E-6 is adapted from Boeing's 707-320 airliner. The
first E-6 made its maiden flight from Boeing's Renton Factory on 19 February
1987, when it was flown to Boeing Field, Seattle, for fitment of mission
avionics, being delivered to the Navy for testing on 22 July 1988. The E-6A,
which was initially named Hermes, entered service with VQ-3 on 3 August 1989,
with the second squadron, VQ-4 receiving its first E-6As in January 1991,
allowing the EC-130Q to be phased on in June that year. The E-6A was renamed
Mercury in Autumn 1991 by request of the US Navy. Sixteen were delivered up to
1992.
The E-6B is an upgrade to the E-6A. It includes a
battlestaff area and new flight deck systems replacing the aging 1970s-style
cockpit with an off-the-shelf 737 Next Generation cockpit. This greatly
increases the situational awareness of the pilot and saves significant cost
over a custom avionics package. The first E-6B was accepted in December 1997.
All 16 E-6A aircraft were modified to the E-6B standard, with the final
delivery taking place on 1 December 2006
Specification
General characteristics
Crew
|
12-25
|
Capacity
|
23
|
Length
|
150ft 4 in (45.8 m)
|
Wingspan
|
148 ft 4 in (45.5 m)
|
Height
|
42 ft 5 in (12.9 m)
|
Loaded weight
|
342,000 lb (154,400 kg)
|
Max. Takeoff weight
|
342,000 lb (154,400 kg)
|
Powerplant
|
4 x CFMI CFM-56-2A-2 high-bypass
turbifans
|
Performance
Maximum speed
|
Mach 0.862 (600 miles per hours, 520
knots; 970 kilometres per hour
|
Range
|
6,600 nmi (7,590 mi, 12,144 km) with 6
hours loiter time)
|
Service ceiling
|
>40,000 ft (12,200 m)
|
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