(Still adding to this, but I will go ahead and post.)
The SteadyKiller 1 (SK-1 or SRAAM-1) missile was designed as a lightweight, slow-speed, short-range, 'fire and forget' self-guided missile to be able to be effectively fired and carried from weight-sensitive platforms such as the Subsonic LFF-11. Raw StatBlock - SRAAM-1
- Weight: 68 kg
- Length: 2.5 metres
- Diameter: 114.3 mm
- Blast type: Annular blast fragmentation
- Warhead weight: 6.8
- Propellant: Solid-fueled
- Maximum operational range: 30 km (optimal) 35-40 km (maximum, tests only)
- Effective operational range: 19 km
- Statistical range: 30.8 nm
- Maximum speed: 1.5 mach (optimal)
- Guidance: Fire and forget infrared seeking
- Steering: control geometry
The SK missile was developed under the need for a domestic supply customized to fit lightweight platforms, mainly that of the AG-3 and the LFF-11, both mainstay attack and fighter craft of many contractors in Laissez-Faire. Designers conceived of a reduced-weight missile that would be slower in speed, yet more accurate in it's range. The smaller weights of the platforms the SRAAM-1 meant that not only would the SK need to be independently guided, but it would have to be able to be reliable within visual range.
As such, the SRAAM-1 was intended for visual range operations, or near visual range operations not exceeding around 30 km. While test reports indicate in some situations it has been able to take out targets after it's stages have completed, and beyond near visual range, it has been noted the missile's low speed becomes more of a vulnerability after around 30 km, leading the designers to name it's optimal operational range at that distance.Thrust and guidance
The SK missile is propelled by an ammonium perchlorate composite propellant rocket engine, which operates at thrust stages timed in seconds and optimized for low-speed and accuracy performance. The rocket engine maintains 445 newtons for one second after launch of the missile to clear the platform. After this, 10 seconds of 1,110 newtons of thrust are designed to acquire the target and make speed adjustments to optimize targeting. Afterwards, a slower stage provides a thrust level of 445 newtons for 100 seconds, after which the missile is unpowered (usually after anywhere from 35-40 km in tests).
The fire and forget guidance of the SK is based around an independent active radar guide. A major problem for early tests was optimization of low-weight and compact radar systems, and guaranteeing competitive accuracy that the design called for. However, the SRAAM/SK missile's guidance system departed from the infrared guided tradition and adapted itself to a radar-locking interface after the failures of cockpit guidance, however theoretically beneficial such guidance would be, were noted. The SK exponentially loses effectiveness against smaller targets, specifically at long ranges. Semi-active variants have been proposed in later SRAAM-2 missiles.
SRAAM-1 was later commissioned with an infrared seeker after proven ineffectiveness of the existing active radar systems. Infrared systems were also seen a more practical within visual range than radar systems, considering the independent nature of the missile.Guidance Stats - SRAAM-1
WarheadWarhead Stats - SRAAM-1
- Type: active infrared seeking
- Field of view angle: 360 degrees
- Aim strength ratio of control deflection: .05
- Type: Conventional
- Blast yield: Annular fragmentation
- Explosive type: High explosive
- Weight: 6.8 kg
The light warhead of the SRAAM-1 missile is designed to match with the extended guidance systems and overall lightweight framework design of the SK/SRAAM missile concept. It's annular fragmentation design was incorporated after the varying success of the active radar guidance systems to allow for greater target elimination rates and improve overall accuracy, if precision could not be achieved by varying conditions and by the slow speed of the SRAAM-1.Targeting
Targets are acquired in-cockpit by the missile, and the missile maintains active infrared guidance to the air target. The most effective targets are fairly large opposing/target aircraft, however fair effectiveness and tracking is given to targets such as fighters by it's slower speeds that allow for more accurate target acquisition and tracking in total, at least with manuverability in control geometry steering.Production
The solid propellant of the rocket engine is made from a class of propellant made to be repetitively produced on a scale sufficient to aerospace applications such as air-to-air missiles, specifically those in dogfights (visual range targeting)Variants
- Uses infrared guide for closer range acquisition in an attempt to improve precision and accuracy. Larger annular fragmentation warhead (7.5 kg) is utilized. Improvements were minimal.