The Sukhoi Su-47
Berkut (Russian: Су-47 Беркут -
Golden Eagle) (NATO reporting name
Firkin), also known as S-32 and S-37
(not to be confused with the twin-
engined delta-canard design offered
by Sukhoi in the early 1990s under
the name Su-37) during the first
development, was an experimental
supersonic jet fighter developed by
Sukhoi Aviation Corporation. A
distinctive feature of the aircraft,
the forward-swept wing that the
device gave an excellent agility and
maneuverability. While the series
production of the type never came,
the sole aircraft produced served as
a technology demonstrator prototype
for a number of advanced
techhnologies later used in the 4.5
generation fighter SU-35BM fighter
and the current 5th generation
Sukhoi PAK FA prototype.
The Sukhoi Design Bureau of
Moscow, Russia has developed the
Su-47 (previously called the S-37
Berkut or Golden Eagle) fighter
aircraft, which first flew in
September 1997. Su-47 is a forward-
swept wing configuration and uses a
highly unstable triplane (with three
main lifting surfaces) aerodynamic
configuration. The Su-47 was
introduced in January 2000 and
completed the first phase of flight
tests in December 2001. The aircraft
is managed by the Russian Air Force
In May 2002 Sukhoi was selected as
prime contractor for the next
generation of Russian PAK FA fighter
program. The PAK FA fighter aircraft
is a development of the Su-47, but
without the forward swept wings.
The first test flight of the PAK FA
fighter aircraft was completed on
January 29, 2010.
The design of the high
maneuverability prototype is based
on the avionics and aerodynamics
technologies developed for the Su-27
upgrade program.
Part of the systems and components
designs from the Su-27, (the all-
weather supersonic fighter aircraft
with NATO reporting name Flanker),
have been used in the Su-47, for
example the design of the canopy,
landing gear, part of the avionics
and the almost vertical tails.
The Su-47 has extremely high agility
at subsonic speed of the aircraft to
the angle of attack and flight path
change very quickly, and it remains
maneuverability in supersonic flight.
Maximum turn rates and the upper
and lower air speed for weapon
launch are important criteria in
terms of fighting superiority. The
Su-47 aircraft has a very high degree
of maneuverability while maintaining
stability and controllability at all
angles of attack.
Maximum turn rates are important
in close combat and also medium
and long distance, when the mission
may involve working on consecutive
targets in different sectors of
airspace. A high rotational speed of
the Su-47 fighter aircraft, the pilot
quickly toward the next goal to
begin launching the weapon.
The swept-forward wing, compared to
a swept-back wing of the same area,
a number of advantages: higher lift
to drag ratio, a higher capacity in
dogfight maneuvers, higher range at
subsonic speed, improved stall
resistance and anti- spin features,
improved stability at high angles of
attack, a lower minimum flight
speed, and a shorter takeoff and
landing distance.
Trunk
The Su-47 fuselage is oval in cross
section and the hull is mainly
constructed of aluminum and
titanium alloys and 13% by weight of
composite materials. The nose dome
is slightly flattened at the bow and
has a horizontal edge to the plane
of the anti-spin characteristics to
optimize.
Wings
The forward swept midwing gives the
unusual and distinctive appearance
of the Su-47. A substantial portion of
the lift set by the forward-swept
wing occurs at the inner part of the
span. The lift is not restricted by
wingtip stall. The ailerons - the
wing-control surfaces - remain
effective at the highest angles of
attack, and controllability of the
aircraft is retained even in the case
of the airflow to separate from the
rest of the wings' surface.
The wing panels of the Su-47 is
made of almost 90% composites. The
forward-swept midwing has a high
aspect ratio, which contributes to
long-range performance. The leading
root extensions to run on the wing
panels, fitted with deflectable slats
on the front, flaps and ailerons on
the trailing edge. The all-moving
and small-area trapezoidal canards
are connected to the leading-edge
root extensions.
Weaponry
The Su-47 fighter pilot features 14
hard points (2 wingtip, 6-8 under
wing, conforming underfuselage 6-4).
The hard points are equipped with
R-77, R-77PD, R-73, K-74 air to air
missiles. It is also equipped with air
to surface missiles X-29T, X-29L,
X-59M, X-31P, X-31A, KAB-500,
KAB-1500.
Cockpit
The cockpit's design has focused on
maintaining a high level of comfort
for the pilot and the pilot the ability
to plane in extremely high G-load
maneuvers to control.
The aircraft is equipped with a new
ejection seat and life support
system. The variable geometry
adaptive ejection seat is an angle of
60 °, the impact of the high G-forces
on the pilot reduced. The chair
aerial combat maneuvers with
significantly higher g loads can
usually be tolerated by the pilot.
The pilot uses a side, low-travel
control stick and throttle
tensometric.
Landing gear
The aircraft uses a retractable
tricycle landing gear with a wheel
type for each unit. The smaller nose
wheel pulls to the back and the two
main wheels to slide forward in the
wing roots.
Engine
The Su-47 fighter aircraft powered by
two D-30F6 Permian Aviadvigatel
turboshaft engines. Around 83.4kN
dry thurst can be produced by each
motor. The engine is primarily used
in short-haul passenger aircraft.
The length and diameter of the
fantip 3.98m and 1.05m respectively,
motor, while dry weight and the
weight of the motor supply 1,550 kg
and 1,712 kg. The engine also
features a thrust reverser and a low
pressure compressor.
Performance
The Su47 fighter aircraft can climb
at a speed of 233m / s. The cruise
speed is 1.800 km / h. The range
and service ceiling of the aircraft
1,782 nm (3,300 km) and 18,000 m
respectively. The maximum takeoff
weight of the aircraft is 34,000 kg.
The wing loading and a maximum g-
force of the Su-47 to 360kg / m² and
9g respectively.
Specification :
Crew: 1
Length: 22.6 m (74 ft 2 in)
Wingspan: 15.16 m to 16.7 m (49 ft 9
in. to 54 ft 9 in)
Height: 6.3 m (20 ft 8 in)
Wing area: 61.87 m² (666 ft ²)
Empty weight: 16,375 kg (36,100 lbs)
Loaded weight: 25,000 kg (55,115 lb)
Max takeoff weight: 35,000 kg (77,162
lbs)
Powerplant: 2 × Lyulka 37FU AL
(planned) flying prototypes used 2
Aviadvigatel D-30F6 afterburning
Maximum speed: Mach 2.34 [2]
(2500 KMH, 1552 mph)
, At sea level: Mach 1.31 (1,400 km /
h, 870 mph [1])
Range: 3300 km (2050 miles)
Wing loading: 360 kg / m² (79.4 lb /
ft ²)
WEAPONS Su-47 Berkut
Machine guns: 1 × 30 mm GSh-round
30-1150
Missiles: 14 hardpoints
Missile Air-to-air: R-77, R-77PD, R-73,
K-74
Missile Air-to-surface: X-29T, X-29L,
X-59m, X-31P, X-31A, KAB-500,
KAB-1500
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