M-13 MSRA

M-13 MSRA
A MSRA being fitted to the wing of an EF-135 Draken
Type	Active radar guided air-to-air missile and surface-to-air missile
Place of origin	Acrea
Service history
In service	2008-Present
Used by	Acrea
Wars	Zemplen War
Production history
Designer	NordEX Försvarssystemet AB
Manufacturer	NordEX Försvarssystemet AB
Specifications
Weight	160 kg (350 lb)
Length	3.4 m (11 ft 2 in)
Diameter	160 mm (6.3 in)
Effective firing range	In excess of 100 km (54 nm)
Warhead	High explosive blast-fragmentation
Detonation mechanism	Proximity or direct impact fuse
Engine	Throttleable ducted rocket
Speed	Mach 4
Guidance system	Mid-Course: Inertial guidance and Datalink Terminal: Active radar homing

The M-13 MSRA (Missil, strids, radar-activ), often called the "Misrah", is an active radar guided air-to-air missile and surface-to-air missile designed and manufactured by Kobalt-Zeiss AG and NordEX Försvarssystemet AB. The missile was designed to achieve the long range, multi-target capability of the previous M-10C DRAAM missiles, while utilising a smaller missile with very high kinematic performance. It was designed in tandem with the M-9 IRSS infrared missile for use with the EF-633 Mako and EF-662 Vampyr fighters, as well as to equip the EF-135 Draken and EF 161 Raven with more capable armament. The missile has an operational range exceeding 100 km, or approximately 54 nm.

Design

Propulsion

The MSRA follows the Ossorian DAAMR in adopting a throttleable air-augmented rocket to increase range. Substantial development funding and time went into delivering this capability in a compact system intended for increased capacity within the weapons bays of 5th generation fighters, as well as shaving off unnecessary weight from the missile. This included several variations on the design, including streamlined intakes built into the missile body at the root of the rear wings which open upon launch of the missile to reduce drag, as well as a more compact motor.

A significant feature of the MSRA is its use of thrust vectoring control. Adopted from development of the M-9 IRSS, thrust vectoring was added to better utilise the TWS guidance features that new AESA radars being designed into the EF-633 and EF-662, and which were being upgraded into the EF-135, were capable of. Focus went into ensuring that the MSRA was able to retain energy as it closed to the target, which in combination with the thrust vector control provides significantly improved performance against hard-maneuvering targets compared to other contemporary radar-guided missiles. The kinematic performance and energy preservation capabilities of the MSRA were a significant design focus.

Control

Being designed with the sensor fusion and data link capabilities of EFX-series fighters in mind, the MSRA has extensive functionality via datalink in addition to its own inertial navigation system. The use of the MSSL data link allows the aircraft to receive mid-course updates to its flight path as well as be redirected to a new target while in flight. Guidance of the missile can be passed off to other aircraft mid-flight using the datalink, and with this method it can also be targeted onto radar contacts obtained by another aircraft even if the launching aircraft itself does not have a radar lock. Terminal guidance is provided by the missile's onboard AESA radar, and has a pitbull range of approximately 9 to 11 nm.

Beginning in 2010, development began on the MSRA-EM, a next-generation update for the MSRA utilising a dual infrared/radar seeker head. Continued development of this missile has continued with the C-model body as a base.

Variants

• M-13A MSRA - Model with improvements to control surfaces, retrofitted to all missiles in late 2010
• M-13C MSRA - Model with improved onboard radar, inertial navigation system, and rocket motor adopted in 2016
• M-13C MSRA-EM - Model with dual radar/IR seeker head in testing

Operators

Current

• Royal Acrean Air Force
• Royal Acrean Navy