Defense Corporations
05-01-2009, 18:43
CM-39
Introduction: Inspired by the Advanced Cruise Missile, this weapon is intended to serve as a low-observable long-range subsonic anti-ship missile. Our 5-4-3 design goal was to deliver a 500kg warhead 4000km to within 3m of the target.
Airframe: We have incorporated a number of features into the airframe to reduce its RCS. These range from general features - radar-absorbent paints, a low-power controlled-emission guidance system, and a beavertail nozzle shield to reduce engine emissions - to frontal (sharp nose cone, forward-swept wings), shoulder (chines), and low-frequency (radome-structured fins and wings) RCS reduction. The missile itself is 9 meters long, allowing for more fuel and a heavier warhead to be carried.
Guidance: The CM-39 uses terrain-contour matching and an inertial navigation system. It is fitted with a GPS - though we expect most nations to attempt to destroy GPS systems on the outbreak of war, we also expect that there will be sufficient GPS systems for it to get at least commercial-level accuracy, and that GPS satellites will be cheap enough to launch to ensure the 3m CEP in our design goals. A DSMAC (digital scene matching area correlation) system is also incorporated into the guidance system in the land-attack variant, allowing the missile to correct its course based on previously-taken images. The CM-39's attack profile is low-altitude, low-observable, low-speed, and long-ranged; it remains subsonic throughout its flight, once released from the bomber that carried it. Terminal guidance is provided via IR sensors, which require less power and are harder to spoof than radar guidance.
Engine: We commissioned our subsidiary, Tsien Engines, to design a new turbofan to give the performance we wanted out of the CM-39; they came through with the TE-T-424 turbofan, which generates 4.24kN (432.4kgf; 953.2lbf) of thrust, sufficient to power the CM-39 at speeds of Mach 0.8. Our ship-based and sub-based variants include a small solid-rocket booster to launch the missile.
Warhead: We fitted a 500kg warhead into the CM-39. The land-attack variant is fitted with a MEPHISTO warhead, which combines a precharge and initial penetrating charge (total of 160kg) to penetrate a bunker or clear soil with a main warhead (338kg) triggered by a variable delay fuse.
Specifications -
Length: 9m
Wingspan: 3.1m
Diameter: 70.5cm
Weight: 1800kg
Max speed: Mach 0.8 (at 50m above sea level)
Range: 4000km
Warhead: 500kg HE or HEAP warhead; MEPHISTO 338kg main warhead (CM-39L); W-80 5-150kT nuclear warhead (CM-39N)
Propulsion: TE-T-424 turbofan, 432.4kgf thrust
Variants: UCM-39 (sub-launched; fins fold out after launch), SCM-39 (ship-launched from Mk.12 large VLS cells; fins fold out after launch), TCM-39 (launched from torpedo tubes), CM-39N (nuclear warhead), CM-39L (land-attack)
Price: CM-39 $700000, UCM-39 $750000, SCM-39 $745000, TCM-39 $725000, CM-39N $1.1 million, CM-39L $800000
OOC - for design discussion see here (http://z4.invisionfree.com/NSDraftroom/index.php?showtopic=5174).
Introduction: Inspired by the Advanced Cruise Missile, this weapon is intended to serve as a low-observable long-range subsonic anti-ship missile. Our 5-4-3 design goal was to deliver a 500kg warhead 4000km to within 3m of the target.
Airframe: We have incorporated a number of features into the airframe to reduce its RCS. These range from general features - radar-absorbent paints, a low-power controlled-emission guidance system, and a beavertail nozzle shield to reduce engine emissions - to frontal (sharp nose cone, forward-swept wings), shoulder (chines), and low-frequency (radome-structured fins and wings) RCS reduction. The missile itself is 9 meters long, allowing for more fuel and a heavier warhead to be carried.
Guidance: The CM-39 uses terrain-contour matching and an inertial navigation system. It is fitted with a GPS - though we expect most nations to attempt to destroy GPS systems on the outbreak of war, we also expect that there will be sufficient GPS systems for it to get at least commercial-level accuracy, and that GPS satellites will be cheap enough to launch to ensure the 3m CEP in our design goals. A DSMAC (digital scene matching area correlation) system is also incorporated into the guidance system in the land-attack variant, allowing the missile to correct its course based on previously-taken images. The CM-39's attack profile is low-altitude, low-observable, low-speed, and long-ranged; it remains subsonic throughout its flight, once released from the bomber that carried it. Terminal guidance is provided via IR sensors, which require less power and are harder to spoof than radar guidance.
Engine: We commissioned our subsidiary, Tsien Engines, to design a new turbofan to give the performance we wanted out of the CM-39; they came through with the TE-T-424 turbofan, which generates 4.24kN (432.4kgf; 953.2lbf) of thrust, sufficient to power the CM-39 at speeds of Mach 0.8. Our ship-based and sub-based variants include a small solid-rocket booster to launch the missile.
Warhead: We fitted a 500kg warhead into the CM-39. The land-attack variant is fitted with a MEPHISTO warhead, which combines a precharge and initial penetrating charge (total of 160kg) to penetrate a bunker or clear soil with a main warhead (338kg) triggered by a variable delay fuse.
Specifications -
Length: 9m
Wingspan: 3.1m
Diameter: 70.5cm
Weight: 1800kg
Max speed: Mach 0.8 (at 50m above sea level)
Range: 4000km
Warhead: 500kg HE or HEAP warhead; MEPHISTO 338kg main warhead (CM-39L); W-80 5-150kT nuclear warhead (CM-39N)
Propulsion: TE-T-424 turbofan, 432.4kgf thrust
Variants: UCM-39 (sub-launched; fins fold out after launch), SCM-39 (ship-launched from Mk.12 large VLS cells; fins fold out after launch), TCM-39 (launched from torpedo tubes), CM-39N (nuclear warhead), CM-39L (land-attack)
Price: CM-39 $700000, UCM-39 $750000, SCM-39 $745000, TCM-39 $725000, CM-39N $1.1 million, CM-39L $800000
OOC - for design discussion see here (http://z4.invisionfree.com/NSDraftroom/index.php?showtopic=5174).