The R-73 was developed to replace the earlier R-60
(AA-8 'Aphid') weapon for short-range use by Soviet fighter aircraft.
The R-73 is an infrared-guided (heat-seeking) missile with a sensitive,
cryogenic cooled seeker with a substantial 'off-boresight' capability:
the seeker can "see" targets up to 45° off the missile's centerline. It
can be linked to a helmet-mounted sight, allowing pilots to designate
targets by looking at them. Minimumengagement range is about 300 meters,
with maximum aerodynamic range of nearly 30 km (18.75 mi) at altitude.
The missile is used for engaging modern and future
fighters, attack aircraft, bombers, helicopters, drones and cruise
missiles, including those executing a maneuver with a g-force up to 12.
It permits the platform to intercept a target from any direction, under
any weather conditions, day or night, in the presence of natural
interference and deliberate jamming. It realizes the "fire and forget"
principle.
The missile design features a canard aerodynamic
configuration: control surfaces are positioned ahead of the wing at a
distance from the center of mass. The airframe consists of modular
compartments accommodating the homing head, aerodynamic control surface
drive system, autopilot, proximity fuze, warhead, engine, gas-dynamic
control system and aileron drive system. The lifting surfaces have a
small aspect ratio. Strakes are mounted ahead of the aerodynamic control
surfaces. The combined aero-gas-dynamic control gives the R-73 highly
maneuverable flight characteristics. During flight, yaw and pitch are
controlled by four aerodynamic control surfaces connected in pairs and
by just as many gas-dynamic spoilers (fins) installed at the nozzle end
of the engine. Control with engine not operating is provided by
aerodynamic control surfaces. Roll stabilization of the missile is
maintained with the help of four mechanically interconnected ailerons
mounted on the wings. Drives of all missile controls are gas, powered
from a solid-propellant gas generator. The passive infrared homing head
supports target lock-on before launch. Guidance to the predicted
position is by the proportional navigation method.
The missile's combat equipment consists of an active
proximity (radar or laser) fuze and impact fuze and a continuous-rod
warhead. The engine operates on high-impulse solid propellant and has a
high-tensile steel case. Russia's Vympel weapons designers have
developed a one-of-a-kind air-to-air missile, which NATO has dubbed as
AA-11, for use on foreign fighter planes. Techically and militarily the
new missile, meant for quick-action dogfights, leave its foreign
analogues far behind. Vympel experts have also made it possible for the
new missile to be easily installed on all available types of aircraft.
The AA-11 can also be used on older planes which will now be able to
effectively handle the US' highly maneuverable F-15 and F-16 jets. The
AA-11 missile is based on all-new components, use new high-energy solid
fuel and an advanced guidance and control system which has made it
possible to minimize their size. Their exceptionally high accuracy is
ensured by the missile's main secret, the so-called transverse control
engine, which rules out misses during the final approach trajectory. The
transverse control engine is still without parallel in the world.
Russia has offered the export-version R-7EE
air-to-air missile system for sale so that it can be fitted to
foreign-made fighter aircraft. Developed by the Vympel state-sector
engineering and design bureau, the R-7EE is designed for close-quarters
aerial combat. Vympel specialists have developed a way of ensuring that
the missile system can be fitted to virtually any type of aircraft. It
can be fitted to older aircraft, which feature heavily in third-world
countries' air forces. The R-73 ("Archer"/AA-11) third generation
highly-maneuverable missile that has become the world's foremost IR
guided dogfight missile. The Vympel R-73 is now operational with the
MiG-23MLA (Flogger K) and all models of the MiG-29 (Fulcrum) and Su-27
(Flanker). All of these aircraft incorporate helmet mounted sighting
systems. The R-73 has been designed to be fitted on new attack
helicopter types such as the Mi-28 (Havoc) and the Ka-50 (Hokum). It is a
lock-on before launch with gymbol limits exceeding 40° during
acquisition and 70° off boresight after lock. It is of basic aluminum
alloy construction (axial-symmetric cruciform scheme with small
elongated tailfins) with the following component sections: seeker,
aero-rudder actuators, autopilot, prox-fuze, warhead, solid-propellant
motor, aero-surfaces, and thrust vectoring control vanes.
The unique combination aero and exhaust-gas maneuver
control represents the world's first operational thrust vector missile
providing an exceptional maneuver capability during the powered flight
phase. Fixed stabilizers and AOA transducers are installed in the nose
just aft of the seeker before fixed canard control surfaces. During the
high impulse solid-rocket motor burn, the missile is controlled by the
canards, joined in pairs on each control channel and by the four in-flow
jet exhaust vanes which also work in pairs. The fixed tail-fins have
ailerons on their trailing edges mechanically coupled to each other for
roll stabilization. After motor burn out, and there is no indication of
post boost cruise burn, missile control is provided only by the
aerodynamic surfaces. All of the missiles gas actuators are feed by a
power pressure accumulator that bleeds overboard and is estimated to be
of a lower pressure then Western missiles due to reduced aerodynamic
loadings on the optimized control surfaces. There is a 7.4 kg. (16.3
lbs.) rod-type warhead fitted with a dual active-radar proximity and
contact fuze. The R-73 is fited to a common launcher rail that holds an
internal cooling bottle.
The R-73 seeker is capable of being fired without any
limitations of "G", "AOA", or aircraft attitude. The seeker-head can be
cued to the target by matching the look angle of the locked up aircraft
radar and/or IRST, or the sighting line of the pilot's eye through the
helmet sight. Guidance to the intercept point is performed according to
proportional navigation methods. The missile can engage targets
maneuvering up to 12 G's. The minimum and maximum intercept ranges
against non-maneuvering targets are published as 300 meters (984 feet)
to 30 kilometers (16.4 NM). There has been a lot of press about a
possible rear-firing air-to-air missile and Sukhoi released information
about a reversed missile pylon for the R-27T ("Alamo B" AA-10b) IR
short-burn version. The R-73 appears to have a better aero-chance
because of its variable control exhaust jet vanes. Applications are
being directed at bombers, transports, and deep strike aircraft.
The R-73 is a highly maneuverable missile that in
many respects is believed to be superior to the United States AIM-9M
Sidewinder, prompting the development of a more sophisticated AIM-9X now
entering squadron service.From 1994 the R-73 has been upgraded in
production to R-74EM standard (originally R-73M), which entered CIS
service in 1997. The R-74EM has greater range and a wider seeker angle
(to 60° off-boresight), as well as improved ECCM (resistance to
countermeasures).
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