maximum angle speed of up to 60 degrees per second. "Mayak" seeker also included new, efficient
anti-countermeasures (flares) implemented. In addition to an increased sensitivity range for the
photo-detector array, a pulse-time signal modulation was applied, and a digital signal processing unit
with several independent channels was introduced. To increase engagement efficiency, the steering
point logic was adjusted to aim for a point forward of the targets engine nozzles. This allowed the
warhead to damage more critical parts of the aircraft system, such as the pilot.
Despite the formal absence of an all-aspect engagement requirement, K-73 developers pursued the
"Mayak" seeker because it was evident that sooner or later this requirement would be demanded.
Providing these capabilities required that the K-73 size and weight increase.
The initial, wingless design had limited maneuverability. High angle of attack is generally required
when dog fighting, and this is generally not favorable for such a design. For a time, the designers
considered a missile variant without aerodynamic control surfaces but instead use six, large six-
cantilevers.
However, the use of gas-only control units limited the flight time by motor operation time. This
significantly decreased tactical employment flexibility. When reviewed at a headed by G.Dementiev, it
was decided to adopt a aerodynamic design similar to that of the K-60. However, unlike the
prototype, they had to provide bank stabilization when the missile was equipped with an autopilot
with traditional gyroscopes. Use of kinematically connected ailerons rather than rollerons was not
accompanied by a missile weight increase. This was because earlier variants had surfaces actuators
elements for gas-dynamic control units operation in the tail section. For control routines, the
autopilot used information from the angles-of-attack and sideslip sensors that are positioned in front
of destabilizes. Like the P-60, this also ensured air flow straightening before the aerodynamic control
surfaces.
A set of sensors, destablators and control surfaces form the characteristic "pine cone" on the first
missile section. Aerodynamic control surfaces, along with a pair of aerodynamic connectors, are used
by the steering motors in the forward part of the second section. This is located behind the autopilot
and active radio proximity fuse. The third section is occupied by a solid propellant gas generator. The
produced actuating fluid is sent to the actuators of aerodynamic controls and through the gas
pipeline coming through the fairing. This in turn actuates the ailerons and exhaust vanes positioned
in the missile’s tail section. The fourth section contains an expanding-rod warhead; inside the
warhead is a safety-and-fusing device. The warhead blast radius is about 3.5 m. The fifth section is a
single-mode solid propellant motor. In the missile’s tail section are the actuators of the ailerons and
gas-dynamic vanes.
Except for the steel engine body, most of the airframe is made of aluminum alloys. The sections are
joined by bayonet joints, except for the end sections that are connected by flange joints. The fully
assembled missile is delivered in a hermetically sealed in a wooden packing crate. The missile is
suspended from the aircraft by the P-72 or P-72D launchers (APU-73-1 or APU-73-1D).
As a result of the joining of two "air-to-air" missile design teams, the K-73 development was
completed at "Vympel" design bureau. The missile went into operational service as the R-73 by
Resolution June 22, 1984. The maximum launch range of the R-73 is 30 km in the forward
hemisphere and high altitude. On the whole, missile’s performance characteristics exceeded the initial
goals, but at the same time the missile’s weight was 1.5 the initial design specification.
The R-73 was exported abroad as the K-73E variant; the first deliveries were made to East Germany
in 1988. The missile was named АА-11 Archer in western terminology. The R-73, when combined
with helmet mounted cueing device "Shel-3UM", enables a pilot to achieve air superiority in close air
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